{"id":102327,"date":"2026-09-05T15:54:47","date_gmt":"2026-09-05T20:54:47","guid":{"rendered":"https:\/\/www.loadview-testing.com\/blog\/realistic-traffic-patterns-for-enterprise-applications\/"},"modified":"2026-09-05T16:06:11","modified_gmt":"2026-09-05T21:06:11","slug":"modeles-de-trafic-realistes-pour-applications-d-entreprise","status":"publish","type":"post","link":"https:\/\/www.loadview-testing.com\/fr\/blog\/modeles-de-trafic-realistes-pour-applications-d-entreprise\/","title":{"rendered":"Comment g\u00e9n\u00e9rer des mod\u00e8les de trafic r\u00e9alistes pour les applications d&#8217;entreprise"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;section&#8221; _builder_version=&#8221;4.27.6&#8243; custom_margin=&#8221;0px||||false|false&#8221; custom_padding=&#8221;0px||||false|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row admin_label=&#8221;row&#8221; _builder_version=&#8221;4.27.6&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; custom_margin=&#8221;0px||||false|false&#8221; custom_padding=&#8221;0px||||false|false&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; admin_label=&#8221;Column&#8221; _builder_version=&#8221;4.27.6&#8243; custom_padding=&#8221;0px||||false|false&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_image src=&#8221;https:\/\/www.loadview-testing.com\/wp-content\/uploads\/hero-realistic-traffic-patterns.webp&#8221; alt=&#8221;Performance engineer reviewing traffic pattern graphs for an enterprise application load test&#8221; title_text=&#8221;hero-realistic-traffic-patterns&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.27.6&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;]La plupart des tests de charge d&#8217;entreprise commencent avec un nombre choisi lors d&#8217;une r\u00e9union. Cinq mille utilisateurs virtuels. Dix mille. Le test r\u00e9ussit, le rapport est archiv\u00e9, et l&#8217;application plante toujours le premier lundi du trimestre.<\/p>\n<p>Les nombres ronds sont faciles \u00e0 convenir et ne vous disent presque rien. Le trafic r\u00e9el arrive par rafales, se r\u00e9partit in\u00e9galement entre les fonctionnalit\u00e9s, et modifie sa composition au moment pr\u00e9cis o\u00f9 le volume atteint son pic. Un test qui envoie un flux plat de requ\u00eates identiques exerce un chemin de code diff\u00e9rent de celui de la production, avec un comportement de cache, des plans de requ\u00eate, et une contention de verrouillage sans rapport avec le syst\u00e8me en direct.<\/p>\n<p>Voici comment construire un mod\u00e8le de trafic \u00e0 partir des donn\u00e9es que vous collectez d\u00e9j\u00e0, et comment le lancer pour que les r\u00e9sultats aient du sens.<\/p>\n<h2 id='table-des-mati\u00e8res'  id=\"boomdevs_1\">Table des mati\u00e8res<\/h2>\n<ol>\n<li><a href=\"#what-makes-enterprise-traffic-hard-to-fake\">Pourquoi le trafic d&#8217;entreprise est difficile \u00e0 simuler<\/a><\/li>\n<li><a href=\"#where-the-traffic-data-already-lives\">O\u00f9 les donn\u00e9es de trafic existent d\u00e9j\u00e0<\/a><\/li>\n<li><a href=\"#how-to-build-a-traffic-model-from-production-data\">Comment construire un mod\u00e8le de trafic \u00e0 partir des donn\u00e9es de production<\/a><\/li>\n<li><a href=\"#where-traffic-models-go-wrong\">O\u00f9 les mod\u00e8les de trafic \u00e9chouent<\/a><\/li>\n<li><a href=\"#what-real-enterprise-traffic-shapes-look-like\">\u00c0 quoi ressemblent les formes de trafic r\u00e9elles en entreprise<\/a><\/li>\n<li><a href=\"#how-to-run-the-model-in-loadview\">Comment ex\u00e9cuter le mod\u00e8le dans LoadView<\/a><\/li>\n<li><a href=\"#how-to-check-the-model-against-production\">Comment v\u00e9rifier le mod\u00e8le par rapport \u00e0 la production<\/a><\/li>\n<li><a href=\"#the-bottom-line\">En r\u00e9sum\u00e9<\/a><\/li>\n<li><a href=\"#frequently-asked-questions\">Questions fr\u00e9quentes<\/a><\/li>\n<\/ol>\n<h2 id='pourquoi-le-trafic-d-entreprise-est-difficile-\u00e0-simuler'  id=\"boomdevs_2\" id=\"what-makes-enterprise-traffic-hard-to-fake\">Pourquoi le trafic d&#8217;entreprise est difficile \u00e0 simuler<\/h2>\n<p>Trois choses d\u00e9concertent les \u00e9quipes qui passent directement d&#8217;un nombre de personnel \u00e0 un test en cours.<\/p>\n<p><strong>La concurrence et le taux d&#8217;arriv\u00e9e ne sont pas le m\u00eame chiffre.<\/strong> Quand un intervenant dit \u00ab nous devons g\u00e9rer 5 000 utilisateurs \u00bb, demandez lequel des deux il entend. Cinq mille personnes connect\u00e9es simultan\u00e9ment est un test compl\u00e8tement diff\u00e9rent de cinq mille sessions d\u00e9marrant chaque heure. Se tromper dans le sens g\u00e9n\u00e9reux vous fera passer des semaines \u00e0 ajuster une charge qui n&#8217;arrivera jamais. Se tromper dans l&#8217;autre sens ne vous dit rien. <a href=\"https:\/\/www.loadview-testing.com\/fr\/en-savoir-plus-sur-les-tests-de-charge\/tests-simultanes-des-utilisateurs-a-partir-du-cloud\/\">Le test d&#8217;utilisateurs concurrents<\/a> ne prend sens que lorsque vous savez lequel des deux chiffres vous ciblez. C&#8217;est la diff\u00e9rence entre un mod\u00e8le bas\u00e9 sur le taux d&#8217;arriv\u00e9e, qui refl\u00e8te comment les utilisateurs arrivent r\u00e9ellement, et un mod\u00e8le bas\u00e9 sur la concurrence, qui maintient une population fixe dans le syst\u00e8me. Le trafic public est presque toujours le premier. Les syst\u00e8mes avec une base utilisateur limit\u00e9e \u2014 postes de centre d&#8217;appels, si\u00e8ges sous licence, portails d&#8217;agents \u2014 se comportent vraiment comme le second.<\/p>\n<p><strong>Le trafic a une forme, et c&#8217;est cette forme qui cause les dommages.<\/strong> Les pools de connexions, les groupes de mise \u00e0 l&#8217;\u00e9chelle automatique et les serveurs d&#8217;application chauff\u00e9s JIT r\u00e9pondent tous au taux de changement, pas seulement au plafond. Un syst\u00e8me qui g\u00e8re confortablement 2 000 utilisateurs concurrents peut \u00e9chouer en atteignant 2 000 s&#8217;il y arrive en quatre-vingt-dix secondes.<\/p>\n<p><strong>Le m\u00e9lange des transactions \u00e9volue avec le volume.<\/strong> \u00c0 volume moyen, un site e-commerce voit surtout du navigation. Lors d&#8217;une vente flash, les appels de paiement et de gestion des stocks prennent une part beaucoup plus grande sur le m\u00eame nombre de requ\u00eates. Le nombre total para\u00eet identique sur un tableau de bord. La charge sur la base de donn\u00e9es ne l&#8217;est pas.[\/et_pb_text][et_pb_image src=&#8221;https:\/\/www.loadview-testing.com\/wp-content\/uploads\/flat-load-vs-shaped-load.webp&#8221; alt=&#8221;Comparison of a flat virtual user load test against a shaped arrival curve with varying transaction mix&#8221; title_text=&#8221;flat-load-vs-shaped-load&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.27.6&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p style=\"text-align: center;\"><strong style=\"font-size: 14px;\">Un nombre plat d&#8217;utilisateurs virtuels et une courbe d&#8217;arriv\u00e9e fa\u00e7onn\u00e9e peuvent produire le m\u00eame d\u00e9bit moyen tout en sollicitant des parties totalement diff\u00e9rentes de la pile.<\/strong><\/p>\n<h2 id='o\u00f9-les-donn\u00e9es-de-trafic-existent-d\u00e9j\u00e0'  id=\"boomdevs_3\" id=\"where-the-traffic-data-already-lives\">O\u00f9 les donn\u00e9es de trafic existent d\u00e9j\u00e0<\/h2>\n<p>Vous n&#8217;avez pas besoin d&#8217;une nouvelle instrumentation. La plupart de ces donn\u00e9es sont d\u00e9j\u00e0 \u00e9crites quelque part sur disque. Le travail consiste \u00e0 les assembler en sessions et \u00e0 filtrer le trafic des bots avant de compter quoi que ce soit.<\/p>\n<p>[\/et_pb_text][dipl_advanced_table columns_number=&#8221;2&#8243; row_spacing=&#8221;1px&#8221; admin_label=&#8221;DP Advanced Table&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; header_text_font_size=&#8221;15px&#8221; table_cell_text_font_size=&#8221;15px&#8221; global_colors_info=&#8221;{}&#8221;][dipl_advanced_table_item cell_value=&#8221;Source&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Informations \u00e0 extraire&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Journaux d\u2019acc\u00e8s du serveur Web et du r\u00e9partiteur de charge&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Requ\u00eates par seconde par point de terminaison, distribution des codes de statut, horodatage r\u00e9el de votre heure la plus charg\u00e9e&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;APM ou surveillance utilisateur r\u00e9el (Dynatrace, Datadog, New Relic)&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Dur\u00e9e de sessions, temps entre pages, temps r\u00e9el de r\u00e9flexion entre interactions&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Analyses Web (exports GA4, Adobe Analytics)&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Sessions par heure, r\u00e9partition par appareil et navigateur, g\u00e9ographie, pages d\u2019entr\u00e9e&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Journaux CDN (CloudFront, Fastly, Akamai)&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Taux de hit du cache, taux de d\u00e9charge d\u2019origine, quels assets manquent&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Journaux du fournisseur d&#8217;identit\u00e9 ou SSO (Okta, Entra ID)&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Taux de connexion et concurrence des sessions, souvent le seul signal utile pour les applications internes&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Planificateur de batch et base de donn\u00e9es&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Quoi d&#8217;autre fonctionne pendant votre fen\u00eatre de pic&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][\/dipl_advanced_table][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.27.6&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Les applications internes d\u2019entreprise n\u2019ont g\u00e9n\u00e9ralement aucune balise d\u2019analyse. Les journaux d\u2019authentification et les journaux des serveurs d\u2019application comblent cette lacune \u2014 les \u00e9v\u00e9nements de connexion fournissent le taux d\u2019arriv\u00e9e, et le temps entre la premi\u00e8re et la derni\u00e8re requ\u00eate par session donne la dur\u00e9e.<\/p>\n<h2 id='comment-construire-un-mod\u00e8le-de-trafic-\u00e0-partir-des-donn\u00e9es-de-production'  id=\"boomdevs_4\" id=\"how-to-build-a-traffic-model-from-production-data\">Comment construire un mod\u00e8le de trafic \u00e0 partir des donn\u00e9es de production<\/h2>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/www.loadview-testing.com\/wp-content\/uploads\/traffic-model-inputs.webp&#8221; alt=&#8221;Diagram showing production data sources feeding into a traffic model with arrival rate, transaction mix, think time, and geography&#8221; title_text=&#8221;traffic-model-inputs&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.27.6&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p style=\"text-align: center;\"><strong style=\"font-size: 14px;\">Quatre sorties d\u00e9finissent le mod\u00e8le : taux d\u2019arriv\u00e9e, m\u00e9lange des transactions, distribution des temps de r\u00e9flexion, et r\u00e9partition g\u00e9ographique.<\/strong><\/p>\n<h3 id='\u00e9tape-1-choisissez-la-fen\u00eatre-exacte-que-vous-mod\u00e9lisez'  id=\"boomdevs_5\" id=\"step-1-pick-the-exact-window-you-re-modeling\">\u00c9tape 1 : Choisissez la fen\u00eatre exacte que vous mod\u00e9lisez<\/h3>\n<p>Pas &#8220;le pic de trafic&#8221;. Une heure pr\u00e9cise, \u00e0 une date pr\u00e9cise, extraite de vos journaux. Prenez l\u2019heure \u00e0 plus fort d\u00e9bit des douze derniers mois, puis choisissez une deuxi\u00e8me fen\u00eatre couvrant votre pire \u00e9v\u00e9nement commercial \u2014 cl\u00f4ture de fin de mois, inscription ouverte, Black Friday, rapport trimestriel. Mod\u00e9lisez les deux. Ils n\u2019ont presque jamais la m\u00eame forme.<\/p>\n<h3 id='\u00e9tape-2-comptez-les-sessions-pas-les-requ\u00eates'  id=\"boomdevs_6\" id=\"step-2-count-sessions-not-requests\">\u00c9tape 2 : Comptez les sessions, pas les requ\u00eates<\/h3>\n<p>Les requ\u00eates par seconde sont les chiffres les plus faciles \u00e0 extraire mais aussi les moins stables. D\u00e9ployez une version frontale qui regroupe trois appels API en un seul et votre nombre de requ\u00eates baisse d\u2019un tiers sans changement de la demande. Les sessions par heure refl\u00e8tent ce que les utilisateurs font r\u00e9ellement. L\u2019\u00e9cart est le plus grand sur les applications monopages, o\u00f9 un clic peut g\u00e9n\u00e9rer une douzaine d\u2019appels API en arri\u00e8re-plan.<\/p>\n<p>Extrayez les sessions par heure pour votre fen\u00eatre, ainsi que la dur\u00e9e moyenne et au 90e percentile des sessions. Gardez les deux chiffres \u2014 la queue compte \u00e0 l&#8217;\u00e9tape trois.<\/p>\n<h3 id='\u00e9tape-3-convertissez-les-sessions-en-concurrence'  id=\"boomdevs_7\" id=\"step-3-convert-sessions-into-concurrency\">\u00c9tape 3 : Convertissez les sessions en concurrence<\/h3>\n<p>La loi de Little relie le taux d\u2019arriv\u00e9e \u00e0 la concurrence :<\/p>\n<p><strong>Sessions concurrentes = sessions par heure \u00d7 (minutes moyennes par session \u00f7 60)<\/strong><\/p>\n<p>18 000 sessions\/heure \u00d7 (6 minutes \u00f7 60) = 1 800 sessions concurrentes<\/p>\n<p>Lancer 18 000 <a href=\"https:\/\/www.loadview-testing.com\/fr\/en-savoir-plus-sur-les-tests-de-charge\/quest-ce-que-la-simulation-virtuelle-de-lutilisateur-dans-les-tests-de-charge\/\">utilisateurs virtuels<\/a> simultan\u00e9s contre cette application, c\u2019est tester quelque chose dix fois plus grand que votre pic r\u00e9el. Vous \u00e9chouerez \u00e0 un test que vous auriez r\u00e9ussi, puis passerez un sprint \u00e0 traquer un goulet d\u2019\u00e9tranglement que la production n\u2019atteindra jamais.<\/p>\n<p>La loi de Little prend la moyenne, donc consid\u00e9rez P90 comme une v\u00e9rification de dimensionnement distincte plut\u00f4t qu\u2019une seconde lecture de la formule. Avec un P90 \u00e0 22 minutes contre une moyenne de 6 minutes, vous obtenez environ 6 600 \u2014 la concurrence si chaque session dure aussi longtemps que le dixi\u00e8me le plus lent. Volontairement pessimiste, c\u2019est le chiffre utile pour la <a href=\"https:\/\/www.loadview-testing.com\/fr\/en-savoir-plus-sur-les-tests-de-charge\/quest-ce-que-la-planification-de-la-capacite-dans-le-contexte-des-tests-de-charge\/\">planification de capacit\u00e9<\/a> lorsque des sessions longues retiennent des ressources rares comme des threads de rapports ou des connexions \u00e0 la base.<\/p>\n<h3 id='\u00e9tape-4-r\u00e9partissez-le-trafic-en-transactions-m\u00e9tier'  id=\"boomdevs_8\" id=\"step-4-break-traffic-into-business-transactions\">\u00c9tape 4 : R\u00e9partissez le trafic en transactions m\u00e9tier<\/h3>\n<p>Regroupez les points de terminaison en transactions m\u00e9tier plut\u00f4t qu&#8217;en URL : recherche, consultation d\u00e9taill\u00e9e, ajout au panier, soumission de r\u00e9clamation, export de rapport, paie. Enregistrez ensuite deux mixages \u2014 la part de chaque transaction sur la totalit\u00e9 de la fen\u00eatre, et sa part durant la minute la plus charg\u00e9e.<\/p>\n<p>Si ces deux mixages diff\u00e8rent de plus de quelques points de pourcentage sur une transaction, construisez-les tous deux dans le test et ex\u00e9cutez-les comme sc\u00e9narios s\u00e9par\u00e9s. Un test bas\u00e9 uniquement sur le mix horaire sous-\u00e9valuera la charge de la transaction qui conna\u00eet le plus de pics au pic.<\/p>\n<h3 id='\u00e9tape-5-extrait-les-temps-de-r\u00e9flexion-des-vraies-sessions'  id=\"boomdevs_9\" id=\"step-5-pull-think-time-from-real-sessions\">\u00c9tape 5 : Extrait les temps de r\u00e9flexion des vraies sessions<\/h3>\n<p>Ne devinez pas le temps de r\u00e9flexion et n\u2019utilisez pas de constante. Une pause fixe de cinq secondes synchronise tous les utilisateurs virtuels en colonne, frappant l\u2019application en cadence, g\u00e9n\u00e9rant un <a href=\"https:\/\/www.loadview-testing.com\/fr\/en-savoir-plus-sur-les-tests-de-charge\/quest-ce-que-le-debit-dans-les-tests-de-performances\/\">d\u00e9bit<\/a> en pics qu\u2019aucune population r\u00e9elle ne produit.<\/p>\n<p>Extrayez le d\u00e9lai entre chargements de pages cons\u00e9cutifs dans de vraies sessions \u00e0 partir des donn\u00e9es RUM ou APM et reproduisez-le comme une distribution. Les utilisateurs d\u2019entreprise sont g\u00e9n\u00e9ralement bimodaux : courts \u00e9carts en naviguant dans un flux qu\u2019ils connaissent par c\u0153ur, longs en lisant un document ou prenant un appel t\u00e9l\u00e9phonique.<\/p>\n<h3 id='\u00e9tape-6-adaptez-la-mont\u00e9e-en-charge-\u00e0-la-courbe-r\u00e9elle'  id=\"boomdevs_10\" id=\"step-6-match-the-ramp-to-the-real-curve\">\u00c9tape 6 : Adaptez la mont\u00e9e en charge \u00e0 la courbe r\u00e9elle<\/h3>\n<p>Tracez le nombre de sessions par minute sur votre fen\u00eatre et fa\u00e7onnez la mont\u00e9e du test pour qu\u2019elle corresponde. Trois formes couvrent la plupart des applications d\u2019entreprise :<\/p>\n<ul>\n<li><strong>Presque verticale.<\/strong> Lancements de produits, ventes de billets, ouverture de march\u00e9. Le pic de concurrence arrive en moins de deux minutes.<\/li>\n<li><strong>Escalier.<\/strong> Applications internes qui s\u2019activent \u00e0 9 h dans chaque fuseau horaire, un palier par r\u00e9gion.<\/li>\n<li><strong>Onde carr\u00e9e.<\/strong> Trafic batch et int\u00e9gration. Allum\u00e9 \u00e0 plein volume, \u00e9teint \u00e0 plein volume, sans mont\u00e9e.<\/li>\n<\/ul>\n<h3 id='\u00e9tape-7-placez-la-charge-l\u00e0-o\u00f9-sont-vos-utilisateurs'  id=\"boomdevs_11\" id=\"step-7-place-load-where-your-users-are\">\u00c9tape 7 : Placez la charge l\u00e0 o\u00f9 sont vos utilisateurs<\/h3>\n<p>Utilisez la r\u00e9partition g\u00e9ographique des analyses ou journaux CDN et g\u00e9n\u00e9rez la charge depuis ces m\u00eames r\u00e9gions. Cela ne concerne pas uniquement la mesure de la latence pour les utilisateurs distants. La latence influe sur la concurrence : une session tenue ouverte par un aller-retour de 280 ms dure plus longtemps que la m\u00eame session sur une connexion de 20 ms, donc des taux d\u2019arriv\u00e9e identiques produisent une concurrence plus \u00e9lev\u00e9e. Tester tout depuis une seule r\u00e9gion cache cela enti\u00e8rement.<\/p>\n<h2 id='o\u00f9-les-mod\u00e8les-de-trafic-\u00e9chouent'  id=\"boomdevs_12\" id=\"where-traffic-models-go-wrong\">O\u00f9 les mod\u00e8les de trafic \u00e9chouent<\/h2>\n<p><strong>Un jeu de donn\u00e9es par utilisateur virtuel.<\/strong> M\u00eame login, m\u00eame ID produit, m\u00eame num\u00e9ro de compte pour dix mille utilisateurs, et votre taux de hit de cache monte \u00e0 presque 100 %. La production ne se comporte pas ainsi. Param\u00e9trez avec un jeu de donn\u00e9es suffisamment large pour correspondre \u00e0 la cardinalit\u00e9 r\u00e9elle \u2014 un pool de comptes, une liste d&#8217;SKU, des IDs de commande uniques par ex\u00e9cution \u2014 puis comparez le taux de hit du cache du test \u00e0 celui de la production avant de faire confiance \u00e0 un r\u00e9sultat.<\/p>\n<p><strong>Rien d&#8217;autre ne tourne pendant le pic.<\/strong> Les pics d&#8217;entreprise co\u00efncident avec des travaux programm\u00e9s : ETL nocturnes, reconstruction d\u2019index, g\u00e9n\u00e9ration de rapports, fen\u00eatres de sauvegarde, synchronisation de r\u00e9plication. Si le travail de rapprochement s\u2019ex\u00e9cute \u00e0 2 h du matin et que votre pic batch est aussi \u00e0 2 h, un environnement de test propre sans charge de fond mesure un syst\u00e8me que vous n\u2019op\u00e9rez pas.<\/p>\n<p><strong>Tests protocolaires uniquement sur des applications lourdes en navigateur.<\/strong> Un test au niveau HTTP rejoue les requ\u00eates captur\u00e9es lors de l\u2019enregistrement. Il n\u2019ex\u00e9cutera pas de JavaScript, ne d\u00e9clenchera pas les appels charg\u00e9s paresseusement, n\u2019ex\u00e9cutera pas les balises tierces, ni ne rendra quoi que ce soit. Pour une application monopage ou un portail interne lourd, cela exclut la plupart du travail effectu\u00e9 par le client \u2014 et tout ce qui d\u00e9termine l\u2019affichage utilisateur. Le <a href=\"https:\/\/www.loadview-testing.com\/fr\/produits\/web-applications\/\">test de charge d\u2019application web<\/a> dans de vrais navigateurs est la seule mani\u00e8re de mesurer le rendu c\u00f4t\u00e9 client sous charge.<\/p>\n<p><strong>Le chemin heureux uniquement.<\/strong> Le trafic r\u00e9el comprend des paniers abandonn\u00e9s, des boucles de retour, des connexions \u00e9chou\u00e9es, des jetons expir\u00e9s, et des double-clics impatients. Les connexions \u00e9chou\u00e9es valent un sc\u00e9nario \u00e0 part : elles touchent le fournisseur d&#8217;identit\u00e9, contournent g\u00e9n\u00e9ralement le cache, et d\u00e9clenchent souvent une logique de verrouillage qui ajoute des \u00e9critures.<\/p>\n<h2 id='\u00e0-quoi-ressemblent-les-formes-de-trafic-r\u00e9elles-en-entreprise'  id=\"boomdevs_13\" id=\"what-real-enterprise-traffic-shapes-look-like\">\u00c0 quoi ressemblent les formes de trafic r\u00e9elles en entreprise<\/h2>\n<p>Trois mod\u00e8les qui reviennent sans cesse, et ce que chacun exige du mod\u00e8le.<\/p>\n<h3 id='vente-flash-ou-lancement-de-produit-dans-le-commerce-de-d\u00e9tail'  id=\"boomdevs_14\" id=\"retail-flash-sale-or-product-drop\">Vente flash ou lancement de produit dans le commerce de d\u00e9tail<\/h3>\n<p>L\u2019arriv\u00e9e est quasi verticale et le m\u00e9lange se concentre sur trois transactions : d\u00e9tails produit, ajout au panier, paiement. Si la page produit est cacheable, le taux de hit CDN s\u2019am\u00e9liore car tout le monde demande le m\u00eame article populaire, ce qui rend un test na\u00eff facile. La pression retombe sur les appels non cacheables \u2014 v\u00e9rifications de stock, \u00e9critures de panier, autorisations de paiement \u2014 tous frappant simultan\u00e9ment l\u2019origine avec contention au niveau des lignes pour un seul SKU. Mod\u00e9lisez le m\u00e9lange \u00e0 la minute de pic, pas \u00e0 l\u2019heure.<\/p>\n<h3 id='cl\u00f4ture-de-fin-de-mois-dans-un-erp-interne'  id=\"boomdevs_15\" id=\"month-end-close-in-an-internal-erp\">Cl\u00f4ture de fin de mois dans un ERP interne<\/h3>\n<p>Le volume de sessions est banal. La dur\u00e9e de session ne l\u2019est pas. Les exports de rapports et les traitements batch durent plusieurs minutes, donc la concurrence monte bien que le taux d\u2019arriv\u00e9e semble plat \u2014 la loi de Little qui joue contre vous. Cela s\u2019ajoute aussi au batch de cl\u00f4ture comptable, donc la charge de fond fait partie du test. S\u00e9parez les utilisateurs de rapport longue dur\u00e9e et ceux du traitement en leur propre classe transactionnelle avec leur propre dur\u00e9e au lieu de les fusionner dans une moyenne unique.<\/p>\n<h3 id='p\u00e9riode-d-inscription-ouverte-dans-l-assurance'  id=\"boomdevs_16\" id=\"insurance-open-enrollment\">P\u00e9riode d\u2019inscription ouverte dans l&#8217;assurance<\/h3>\n<p>Semaines de charge \u00e9lev\u00e9e avec un pic marqu\u00e9 les deux derniers jours. Les sessions sont longues car les gens lisent les documents de plan, et elles comportent beaucoup d\u2019authentification et de t\u00e9l\u00e9chargements. La partie de plusieurs semaines est un <a href=\"https:\/\/www.loadview-testing.com\/fr\/en-savoir-plus-sur-les-tests-de-charge\/les-tests-dendurance-et-leur-importance-pour-la-stabilite-du-systeme\/\">test d\u2019endurance<\/a>, o\u00f9 les fuites de m\u00e9moire, l\u2019\u00e9puisement du pool de connexions, et le volume des journaux comptent plus que la concurrence maximale. Le pic des derniers jours n\u00e9cessite son propre mod\u00e8le.<\/p>\n<h2 id='comment-ex\u00e9cuter-le-mod\u00e8le-dans-loadview'  id=\"boomdevs_17\" id=\"how-to-run-the-model-in-loadview\">Comment ex\u00e9cuter le mod\u00e8le dans LoadView<\/h2>\n<p>Une fois le mod\u00e8le cr\u00e9\u00e9, la configuration du test en d\u00e9coule. LoadView propose trois <a href=\"https:\/\/www.loadview-testing.com\/fr\/fonctionnalites\/courbes-de-charge\/\">courbes de charge<\/a>, et votre mod\u00e8le vous indique laquelle choisir :<\/p>\n<p>[\/et_pb_text][dipl_advanced_table columns_number=&#8221;2&#8243; row_spacing=&#8221;1px&#8221; admin_label=&#8221;DP Advanced Table&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; header_text_font_size=&#8221;15px&#8221; table_cell_text_font_size=&#8221;15px&#8221; global_colors_info=&#8221;{}&#8221;][dipl_advanced_table_item cell_value=&#8221;Courbe de charge&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Utilisez-la lorsque votre mod\u00e8le indique&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Courbe de charge par palier&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Vous avez un objectif de concurrence et souhaitez voir o\u00f9 le temps de r\u00e9ponse se d\u00e9grade dans la mont\u00e9e&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Courbe bas\u00e9e sur un objectif&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Votre mod\u00e8le s\u2019exprime en d\u00e9bit \u2014 transactions ou sessions par intervalle \u2014 ou vous validez un SLA&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Courbe ajustable dynamique&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][dipl_advanced_table_item cell_value=&#8221;Vous voulez d\u00e9placer la charge et la distribution r\u00e9gionale pendant le test pour trouver o\u00f9 le syst\u00e8me fl\u00e9chit&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][\/dipl_advanced_table_item][\/dipl_advanced_table][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.27.6&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Enregistrez le flux de session avec <a href=\"https:\/\/www.loadview-testing.com\/fr\/fonctionnalites\/script-point-and-click\/\">EveryStep Web Recorder<\/a> pour que le script reproduise le parcours utilisateur dans un vrai navigateur, sur les navigateurs desktop et mobiles que vos analyses indiquent. Fixez la r\u00e9partition r\u00e9gionale avec le <a href=\"https:\/\/www.loadview-testing.com\/fr\/fonctionnalites\/reseau-geo-distribue\/\">r\u00e9seau d&#8217;injection g\u00e9o-distribu\u00e9<\/a> pour correspondre \u00e0 l\u2019\u00e9tape sept de votre mod\u00e8le.<\/p>\n<p>Pour les applications qui ne touchent jamais l\u2019internet public, les injecteurs sur site <a href=\"https:\/\/www.loadview-testing.com\/fr\/fonctionnalites\/test-de-charge-derriere-pare-feu\/\">testent la charge derri\u00e8re votre pare-feu<\/a> tout en rapportant sur la m\u00eame plateforme \u2014 c\u2019est ainsi que la plupart du trafic ERP interne et portail est mod\u00e9lis\u00e9.<\/p>\n<h2 id='comment-v\u00e9rifier-le-mod\u00e8le-par-rapport-\u00e0-la-production'  id=\"boomdevs_18\" id=\"how-to-check-the-model-against-production\">Comment v\u00e9rifier le mod\u00e8le par rapport \u00e0 la production<\/h2>\n<p>Un mod\u00e8le de trafic est une hypoth\u00e8se tant que vous ne comparez pas ses sorties au r\u00e9el. Capturez l\u2019arri\u00e8re-plan pendant l\u2019ex\u00e9cution du test \u2014 \u00e9v\u00e9nements d\u2019attente en base, saturation des pools de connexions, profondeur des files, activit\u00e9 d\u2019autoscaling, taux de requ\u00eates CDN \u00e0 l\u2019origine, limitation du fournisseur d\u2019identit\u00e9. Ces signaux expliquent les chiffres ci-dessous.<\/p>\n<p>Apr\u00e8s le test, mettez cinq mesures c\u00f4te \u00e0 c\u00f4te avec la production pour la m\u00eame fen\u00eatre :<\/p>\n<ol>\n<li><strong>D\u00e9bit par transaction.<\/strong> Si le d\u00e9bit du test est bien en dessous de la production au m\u00eame nombre d\u2019utilisateurs, le temps de r\u00e9flexion est trop long ou le script manque des appels.<\/li>\n<li><strong>Pourcentages de mix transactionnel.<\/strong> Une d\u00e9rive ici signifie que la logique de branchement du script ne correspond pas aux mouvements r\u00e9els des utilisateurs.<\/li>\n<li><strong>Taux de hit du cache.<\/strong> Un test \u00e0 95 % contre une production \u00e0 70 % indique un jeu de donn\u00e9es trop restreint.<\/li>\n<li><strong>Taux et types d\u2019erreurs.<\/strong> La production a presque toujours un taux d\u2019erreur de base. Un test sans erreur saute g\u00e9n\u00e9ralement quelque chose.<\/li>\n<li><strong>Dur\u00e9e moyenne de session.<\/strong> Cela valide tout le calcul de concurrence de l\u2019\u00e9tape trois.<\/li>\n<\/ol>\n<p>Puis <a href=\"https:\/\/www.loadview-testing.com\/fr\/en-savoir-plus-sur-les-tests-de-charge\/comment-analyser-les-resultats-de-vos-tests-de-charge\/\">analysez vos r\u00e9sultats de test de charge<\/a> par rapport \u00e0 ces cinq mesures, ajustez le script, et relancez. Deux it\u00e9rations suffisent g\u00e9n\u00e9ralement pour obtenir un mod\u00e8le assez proche pour \u00eatre fiable.<\/p>\n<h2 id='questions-fr\u00e9quentes'  id=\"boomdevs_19\" id=\"frequently-asked-questions\">Questions fr\u00e9quentes<\/h2>\n<p>[\/et_pb_text][et_pb_accordion open_toggle_text_color=&#8221;#42526e&#8221; open_toggle_background_color=&#8221;#FFFFFF&#8221; closed_toggle_background_color=&#8221;#FFFFFF&#8221; toggle_icon=&#8221;&#x4c;||divi||400&#8243; icon_color=&#8221;#0C71C3&#8243; use_icon_font_size=&#8221;on&#8221; icon_font_size=&#8221;20px&#8221; admin_label=&#8221;Accordion&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; toggle_text_color=&#8221;#42526e&#8221; body_text_color=&#8221;#42526e&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_accordion_item title=&#8221;De combien d&#8217;utilisateurs virtuels ai-je r\u00e9ellement besoin ?&#8221; open=&#8221;on&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p>Calculez-le \u00e0 partir des sessions par heure et de la dur\u00e9e moyenne des sessions plut\u00f4t que de choisir un nombre rond. Un syst\u00e8me g\u00e9rant 18 000 sessions par heure avec une dur\u00e9e moyenne de six minutes supporte environ 1 800 sessions concurrentes, pas 18 000. Ex\u00e9cutez la m\u00eame formule avec votre dur\u00e9e de session au P90 pour une v\u00e9rification pessimiste de la taille utile \u00e0 la planification.<\/p>\n<p>[\/et_pb_accordion_item][et_pb_accordion_item title=&#8221;Puis-je simplement rejouer le trafic de production au lieu de le mod\u00e9liser ?&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; open=&#8221;off&#8221;]<\/p>\n<p>Le rejouage est utile pour valider un mod\u00e8le que vous avez d\u00e9j\u00e0 construit. Pris seul, il a des limites : le trafic enregistr\u00e9 contient des donn\u00e9es personnelles \u00e0 anonymiser, les jetons de session expirent, et les \u00e9critures avec \u00e9tat ne peuvent \u00eatre r\u00e9p\u00e9t\u00e9es en toute s\u00e9curit\u00e9. Et il ne peut pas d\u00e9passer le volume que vous avez enregistr\u00e9, soit pr\u00e9cis\u00e9ment celui que vous devez d\u00e9passer dans vos tests.<\/p>\n<p>[\/et_pb_accordion_item][et_pb_accordion_item title=&#8221;\u00c0 quelle fr\u00e9quence le mod\u00e8le de trafic doit-il \u00eatre reconstruit ?&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; open=&#8221;off&#8221;]<\/p>\n<p>Apr\u00e8s toute version modifiant le front-end ou le flux utilisateur, apr\u00e8s un changement commercial qui modifie le mix transactionnel, et avant tout \u00e9v\u00e9nement de charge \u00e9lev\u00e9e connu. Un rythme trimestriel est un minimum raisonnable pour une application stable.<\/p>\n<p>[\/et_pb_accordion_item][et_pb_accordion_item title=&#8221;Dois-je ex\u00e9cuter des tests au niveau protocolaire ou en vrais navigateurs ?&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; open=&#8221;off&#8221;]<\/p>\n<p>Ils r\u00e9pondent \u00e0 des questions diff\u00e9rentes. Les tests au niveau protocolaire sont peu co\u00fbteux par utilisateur virtuel et adapt\u00e9s aux charges c\u00f4t\u00e9 back-end et API. Les tests en vrai navigateur ex\u00e9cutent JavaScript, d\u00e9clenchent les appels charg\u00e9s paresseusement, et ex\u00e9cutent des balises tierces, ce qui est la seule fa\u00e7on de voir ce qu\u2019un utilisateur d\u2019application monopage vit sous charge. La plupart des programmes d\u2019entreprise utilisent les deux.<\/p>\n<p>[\/et_pb_accordion_item][et_pb_accordion_item title=&#8221;Que faire si mon application interne n&#8217;a pas de donn\u00e9es analytiques ?&#8221; _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221; open=&#8221;off&#8221;]<\/p>\n<p>Utilisez les journaux d\u2019authentification pour le taux de connexion et la dur\u00e9e des sessions, les journaux serveur d\u2019application pour le volume de requ\u00eates par point de terminaison, et le planificateur batch pour ce qui fonctionne d\u2019autre pendant votre pic. Les applications internes portent rarement des balises analytiques, mais elles ont toujours des journaux d\u2019authentification et serveur.<\/p>\n<p>[\/et_pb_accordion_item][\/et_pb_accordion][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.27.6&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2 id='en-r\u00e9sum\u00e9'  id=\"boomdevs_20\" id=\"the-bottom-line\">En r\u00e9sum\u00e9<\/h2>\n<p>Un pattern de trafic r\u00e9aliste est d\u00e9fini par quatre mesures, pas un seul chiffre : la vitesse d\u2019arriv\u00e9e des sessions, ce que ces sessions font, la dur\u00e9e des pauses des utilisateurs entre actions, et leur localisation. Chacune est d\u00e9j\u00e0 pr\u00e9sente dans vos journaux.<\/p>\n<p>Extrayez ces quatre, appliquez la loi de Little pour obtenir une donn\u00e9e de concurrence v\u00e9rifiable, et ajustez la mont\u00e9e en charge pour correspondre \u00e0 une vraie heure au lieu d\u2019une ligne droite. Puis validez le test par rapport \u00e0 la production et ajustez. C\u2019est plus de travail que de choisir un nombre rond d\u2019utilisateurs virtuels, mais c\u2019est la seule version de test dont vous pouvez vous servir.<\/p>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.27.6&#8243; text_font_size=&#8221;20px&#8221; text_line_height=&#8221;1.5em&#8221; header_2_text_color=&#8221;#FFFFFF&#8221; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; custom_css_main_element=&#8221;background: linear-gradient(135deg, #1a73e8, #0d47a1);||  color: #fff;||  padding: 1.4rem 1.6rem;||  border-radius: 8px;||  margin: 2rem 0;||  text-align: center;&#8221; custom_css_free_form=&#8221;selector a {||  color: #fff;||  font-weight: 600;||  text-decoration: underline;||}&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2 id='testez-votre-mod\u00e8le-de-trafic-dans-de-vrais-navigateurs'  id=\"boomdevs_21\" id=\"test-your-traffic-model-in-real-browsers\">Testez votre mod\u00e8le de trafic dans de vrais navigateurs<\/h2>\n<p>LoadView ex\u00e9cute vos flux de session dans de vrais navigateurs depuis plus de 40 zones AWS et Azure, avec des courbes de charge que vous fa\u00e7onnez selon le rythme d\u2019arriv\u00e9e mesur\u00e9. Les plans de <a href=\"https:\/\/www.loadview-testing.com\/fr\/test-de-charge-dentreprise\/\">tests de charge enterprise<\/a> ajoutent des sous-comptes, SSO, et migration de scripts depuis des outils h\u00e9rit\u00e9s.<\/p>\n<p><a href=\"https:\/\/www.loadview-testing.com\/fr\/demo\/\">Planifiez une d\u00e9mo<\/a> avec un ing\u00e9nieur performance LoadView pour parcourir votre mod\u00e8le de trafic.<\/p>\n<p>[\/et_pb_text][et_pb_code _builder_version=&#8221;4.27.6&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;]<script type=\"application\/ld+json\"><!-- [et_pb_line_break_holder] -->{<!-- [et_pb_line_break_holder] -->  \"@context\": \"https:\/\/schema.org\",<!-- [et_pb_line_break_holder] -->  \"@type\": \"HowTo\",<!-- [et_pb_line_break_holder] -->  \"name\": \"How to Build a Traffic Model From Production Data\",<!-- [et_pb_line_break_holder] -->  \"description\": \"Seven steps to convert production telemetry into a load test traffic model for an enterprise application.\",<!-- [et_pb_line_break_holder] -->  \"step\": [<!-- [et_pb_line_break_holder] -->    {\"@type\": \"HowToStep\", \"position\": 1, \"name\": \"Pick the exact window you are modeling\", \"text\": \"Choose a specific hour from your logs rather than a vague notion of peak traffic. Model the highest-throughput hour of the last twelve months and a second window covering your worst business event.\"},<!-- [et_pb_line_break_holder] -->    {\"@type\": \"HowToStep\", \"position\": 2, \"name\": \"Count sessions, not requests\", \"text\": \"Pull sessions per hour for the chosen window along with average and 90th percentile session duration. Session counts track real demand even when a front-end release changes the request count per page.\"},<!-- [et_pb_line_break_holder] -->    {\"@type\": \"HowToStep\", \"position\": 3, \"name\": \"Convert sessions into concurrency\", \"text\": \"Apply Little's Law: concurrent sessions equals sessions per hour multiplied by average session length in hours. This gives you the virtual user count the test actually needs.\"},<!-- [et_pb_line_break_holder] -->    {\"@type\": \"HowToStep\", \"position\": 4, \"name\": \"Break traffic into business transactions\", \"text\": \"Group endpoints into business transactions such as search, view detail, add to cart, checkout, and report export. Record each transaction's share of traffic at average volume and at peak minute volume.\"},<!-- [et_pb_line_break_holder] -->    {\"@type\": \"HowToStep\", \"position\": 5, \"name\": \"Pull think time from real sessions\", \"text\": \"Measure the gap between consecutive page loads inside real user sessions and reproduce it as a distribution rather than a constant value.\"},<!-- [et_pb_line_break_holder] -->    {\"@type\": \"HowToStep\", \"position\": 6, \"name\": \"Match the ramp to the real curve\", \"text\": \"Plot per-minute session counts across the window and shape the load test ramp to match, whether that is a near-vertical spike, a staircase across time zones, or a flat batch window.\"},<!-- [et_pb_line_break_holder] -->    {\"@type\": \"HowToStep\", \"position\": 7, \"name\": \"Place load where your users are\", \"text\": \"Reproduce the geographic split from analytics or CDN logs by generating load from the same regions, because latency changes how long sessions stay open and therefore changes concurrency.\"}<!-- [et_pb_line_break_holder] -->  ]<!-- [et_pb_line_break_holder] -->}<!-- [et_pb_line_break_holder] --><\/script><!-- [et_pb_line_break_holder] --><script type=\"application\/ld+json\"><!-- [et_pb_line_break_holder] -->{<!-- [et_pb_line_break_holder] -->  \"@context\": \"https:\/\/schema.org\",<!-- [et_pb_line_break_holder] -->  \"@type\": \"FAQPage\",<!-- [et_pb_line_break_holder] -->  \"mainEntity\": [<!-- [et_pb_line_break_holder] -->    {\"@type\": \"Question\", \"name\": \"How many virtual users do I actually need?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Calculate it from sessions per hour and average session duration using Little's Law rather than picking a round number. A system handling 18,000 sessions per hour with an average six-minute session carries about 1,800 concurrent sessions, not 18,000.\"}},<!-- [et_pb_line_break_holder] -->    {\"@type\": \"Question\", \"name\": \"Can I just replay production traffic instead of modeling it?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Traffic replay is useful for validating a model, but it has limits. Recorded traffic carries personal data you have to scrub, session tokens that expire, and stateful writes you cannot repeat safely. It also cannot exceed the volume you recorded, which is the volume you most need to test beyond.\"}},<!-- [et_pb_line_break_holder] -->    {\"@type\": \"Question\", \"name\": \"How often should the traffic model be rebuilt?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Rebuild after any release that changes the front end or the user flow, after a business change that shifts the transaction mix, and before any known high-load event. Quarterly is a reasonable floor for a stable application.\"}},<!-- [et_pb_line_break_holder] -->    {\"@type\": \"Question\", \"name\": \"Should I run protocol-level tests or real-browser tests?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"They answer different questions. Protocol-level tests are cheap and good for hammering APIs and back-end capacity. Real-browser tests execute JavaScript, fire lazy-loaded calls, and run third-party tags, which is the only way to see what a user of a single-page application experiences under load.\"}},<!-- [et_pb_line_break_holder] -->    {\"@type\": \"Question\", \"name\": \"What if my internal application has no analytics data?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Use authentication logs for login rate and session length, application server logs for request volume by endpoint, and the batch scheduler for what else runs during your peak window. Internal applications rarely carry analytics tags, but they always carry auth and server logs.\"}}<!-- [et_pb_line_break_holder] -->  ]<!-- [et_pb_line_break_holder] -->}<!-- [et_pb_line_break_holder] --><\/script>[\/et_pb_code][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Construisez un mod\u00e8le de trafic de test de charge \u00e0 partir des donn\u00e9es de production \u2014 taux d&#8217;arriv\u00e9e, mix de sessions, temps de r\u00e9flexion et g\u00e9ographie correspondant \u00e0 une utilisation r\u00e9elle en entreprise.<\/p>\n","protected":false},"author":22,"featured_media":102302,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"[caption id=\"attachment_101478\" align=\"alignnone\" width=\"1024\"]<img class=\"size-large wp-image-101478\" src=\"https:\/\/www.loadview-testing.com\/wp-content\/uploads\/ffiec-load-testing-hero-1024x683.webp\" alt=\"A bank IT examiner reviewing capacity and load test results for an online banking platform\" width=\"1024\" height=\"683\" \/> FFIEC guidance is examined, not checked off. The examiner reads your testing as evidence of sound practice.[\/caption]\r\n\r\n<em>For IT, risk, and compliance teams at US banks and credit unions preparing for an IT examination.<\/em>\r\n\r\nPicture a Friday afternoon at a growing credit union. Direct deposits land, members flood the mobile app to move money, and the transfer screen starts to spin. Nothing goes fully down, but for twenty minutes the busiest hour of the week feels broken. Months later, an IT examiner sits across the table and asks a plain question: how did you know that would not happen?\r\n\r\nThat question sits at the center of FFIEC guidance. There is no rule number that says \"run a 500-user load test.\" Instead, an examiner reads what you did and decides whether it looks like sound practice for an institution your size. This article is about seeing your load and capacity testing the way that examiner does, and about producing answers that hold up.\r\n<h2>What This Guide Covers<\/h2>\r\n<ol>\r\n \t<li><a href=\"#ffiec-guidance-is-a-lens-not-a-rulebook\">FFIEC Guidance Is a Lens, Not a Rulebook<\/a><\/li>\r\n \t<li><a href=\"#which-handbook-booklets-touch-load-and-capacity-testing\">Which Handbook Booklets Touch Load and Capacity Testing<\/a><\/li>\r\n \t<li><a href=\"#the-questions-an-examiner-actually-asks\">The Questions an Examiner Actually Asks<\/a><\/li>\r\n \t<li><a href=\"#where-community-banks-and-credit-unions-slip\">Where Community Banks and Credit Unions Slip<\/a><\/li>\r\n \t<li><a href=\"#producing-the-evidence-without-overbuilding\">Producing the Evidence Without Overbuilding<\/a><\/li>\r\n \t<li><a href=\"#the-bottom-line\">The Bottom Line<\/a><\/li>\r\n \t<li><a href=\"#frequently-asked-questions\">Frequently Asked Questions<\/a><\/li>\r\n<\/ol>\r\n<h2 id=\"ffiec-guidance-is-a-lens-not-a-rulebook\">FFIEC Guidance Is a Lens, Not a Rulebook<\/h2>\r\nThe Federal Financial Institutions Examination Council does not regulate your bank. It is an interagency body, the OCC, the FDIC, the Federal Reserve, the NCUA, and the CFPB, plus a state liaison group, that agrees on uniform principles and publishes them as the IT Examination Handbook. Your own primary regulator then examines you against that handbook.\r\n\r\nThat changes how the testing question works. A hard rule can be satisfied by ticking a box. Guidance is read as evidence of judgment: did you identify the systems that matter, understand how they behave under load, and act on what you found. An examiner is not comparing you to a fixed number. They are comparing your practice to what a reasonable institution of your size and complexity would do.\r\n\r\nProportionality runs through the whole handbook. The Business Continuity Management booklet, for example, asks examiners to assess whether test methods are \"commensurate with the size and complexity\" of the institution and the criticality of the function. A community bank and a top-20 bank are held to the same principle and a very different bar.\r\n<h2 id=\"which-handbook-booklets-touch-load-and-capacity-testing\">Which Handbook Booklets Touch Load and Capacity Testing<\/h2>\r\nFour booklets in the IT Examination Handbook shape how load and capacity work is judged. Knowing which one an examiner is drawing from tells you what they are really asking.\r\n<h3>Architecture, Infrastructure, and Operations<\/h3>\r\nThe <a href=\"https:\/\/ithandbook.ffiec.gov\/it-booklets\/architecture-infrastructure-and-operations\/\">AIO booklet<\/a>, updated in 2021, is the home of capacity management and performance monitoring. It expects an institution to plan capacity against demand, watch performance against targets, and keep systems inside their limits as volume grows. This is where <a href=\"https:\/\/www.loadview-testing.com\/learn\/capacity-planning\/\">capacity planning<\/a> backed by real measurements belongs, rather than a spreadsheet estimate no one has tested.\r\n<h3>Business Continuity Management<\/h3>\r\nThe <a href=\"https:\/\/ithandbook.ffiec.gov\/it-booklets\/business-continuity-management\/\">BCM booklet<\/a>, updated in 2019, covers resilience: can the institution keep operating through disruption, and has it tested that it can. Load and <a href=\"https:\/\/www.loadview-testing.com\/learn\/website-stress-testing\/\">stress testing<\/a> feed the resilience picture, and they pair naturally with the <a href=\"https:\/\/www.loadview-testing.com\/learn\/disaster-recovery-planning\/\">disaster recovery testing<\/a> the booklet expects, so a recovered system is also one you have proven can carry the load.\r\n<h3>Development, Acquisition, and Maintenance<\/h3>\r\nThe <a href=\"https:\/\/ithandbook.ffiec.gov\/it-booklets\/development-acquisition-and-maintenance\/\">Development, Acquisition, and Maintenance booklet<\/a> covers what happens before a change reaches members. It expects testing as part of the release process, which for a customer-facing system means checking that a new build handles expected volume, not just that its features work.\r\n<h3>Outsourcing Technology Services and Appendix J<\/h3>\r\nMost banks and credit unions run their core, digital banking, and payments through vendors. The <a href=\"https:\/\/ithandbook.ffiec.gov\/it-booklets\/outsourcing-technology-services\/\">Outsourcing booklet<\/a>, and Appendix J on the resilience of outsourced technology services, make clear that using a vendor does not move the responsibility off your desk. You are still expected to understand and, where you can, validate that those services hold up under your volume.\r\n<h2 id=\"the-questions-an-examiner-actually-asks\">The Questions an Examiner Actually Asks<\/h2>\r\nGuidance turns into specific questions in the exam room. The gap between a weak answer and a strong one is almost always evidence, and load testing is what produces it.\r\n<table>\r\n<thead>\r\n<tr>\r\n<th>What the examiner asks<\/th>\r\n<th>A weak answer<\/th>\r\n<th>A strong answer<\/th>\r\n<\/tr>\r\n<\/thead>\r\n<tbody>\r\n<tr>\r\n<td>How do you know online and mobile banking hold up on your busiest day?<\/td>\r\n<td>\"We have not had an outage,\" or \"the vendor handles it.\"<\/td>\r\n<td>\"We load tested the login-to-transfer flow to our projected peak plus headroom. Here is the dated report.\"<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>What happens when volume doubles?<\/td>\r\n<td>\"We would add capacity if we needed to.\"<\/td>\r\n<td>\"We stress tested past twice our peak, found the limit, and documented what we changed.\"<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Did you test this release before it went live?<\/td>\r\n<td>\"It passed functional QA.\"<\/td>\r\n<td>\"A capacity test ran as a release gate, tied to the change record.\"<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>What did you do when a test found a problem?<\/td>\r\n<td>\"We noted it in a ticket.\"<\/td>\r\n<td>\"We fixed the slow component, re-ran the same test, and kept both results.\"<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>Is your testing scaled to your risk?<\/td>\r\n<td>\"We run one test a year because that is what we have always done.\"<\/td>\r\n<td>\"Our depth and cadence track our size, our complexity, and how critical each system is.\"<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\nNone of the strong answers require a large program. They require that a test was run against the right system, that a number was written down, and that someone acted on it. That is what an examiner means by evidence.\r\n<h2 id=\"where-community-banks-and-credit-unions-slip\">Where Community Banks and Credit Unions Slip<\/h2>\r\nThe most common miss is assuming the vendor covers it. A core or digital banking provider does run its own testing, but that testing is sized for the provider's whole book of clients, not for your payday, your tax-refund season, or the marketing push that triples new-account traffic. When an examiner asks how your members fare on your peak day, \"the vendor tests it\" is not an answer you can show.\r\n\r\nThe second miss is testing only the parts that are easy to hit. A protocol-level check on the login endpoint can look fine while the real member flow, with multi-factor prompts and a rendered dashboard, is far slower under load. Banking authentication is a frequent choke point, which is why <a href=\"https:\/\/www.loadview-testing.com\/blog\/otp-load-testing\/\">OTP load testing<\/a> and the full sign-in path deserve their own attention rather than a raw endpoint ping.\r\n\r\nThe third is treating one passing test as permanent. Member counts grow, features ship, and a system that cleared its bar last year may not clear it after a core upgrade. Guidance reads a stale test as no test, so testing that keeps pace with growth is what <a href=\"https:\/\/www.loadview-testing.com\/learn\/scalability-testing\/\">scalability testing<\/a> is for.\r\n<h2 id=\"producing-the-evidence-without-overbuilding\">Producing the Evidence Without Overbuilding<\/h2>\r\nYou do not need an exchange-grade test lab to satisfy an examiner. You need to cover the systems your members touch, at a depth that matches your risk, and to keep the results. A workable path for a lean team:\r\n\r\n[caption id=\"attachment_101485\" align=\"alignnone\" width=\"1024\"]<img class=\"size-large wp-image-101485\" src=\"https:\/\/www.loadview-testing.com\/wp-content\/uploads\/ffiec-load-testing-capacity-management-cycle-1024x683.webp\" alt=\"Capacity management cycle: plan capacity, set targets, load test, measure, and remediate, with an examiner reviewing the loop\" width=\"1024\" height=\"683\" \/> Capacity management is a loop, and the examiner reads the whole cycle, not a single test.[\/caption]\r\n<ol>\r\n \t<li><strong>Start at your digital front door.<\/strong> Online banking, the mobile web app, bill pay, and loan or account applications are the systems members feel first, and the ones an examiner asks about first. <a href=\"https:\/\/www.loadview-testing.com\/blog\/finanical-website-and-application-load-testing\/\">Financial application load testing<\/a> starts here.<\/li>\r\n \t<li><strong>Set targets from your real peak days.<\/strong> Payday, month-end, and tax season give you honest numbers. Write down the peak concurrent members and the response-time and error-rate limits that count as a pass.<\/li>\r\n \t<li><strong>Test the member flow, not just the endpoint.<\/strong> Script the real journey, sign in, view balances, move money, in a real browser so results reflect what a member experiences, and drive the endpoints behind it with <a href=\"https:\/\/www.loadview-testing.com\/learn\/api-load-testing\/\">API load testing<\/a>. <a href=\"https:\/\/www.loadview-testing.com\/features\/\">Real-browser load testing<\/a> is what makes the number credible.<\/li>\r\n \t<li><strong>Push past peak once, then keep the report.<\/strong> Find the limit, record the <a href=\"https:\/\/www.loadview-testing.com\/features\/performance-reports\/\">performance reports<\/a> with response times and error rates, and file them where the exam can find them.<\/li>\r\n \t<li><strong>Right-size the cadence.<\/strong> Re-test on major releases and as volume grows, and fold it into your <a href=\"https:\/\/www.loadview-testing.com\/features\/ci-cd-integrations\/\">CI\/CD pipeline<\/a> if you have one. Match the frequency to the risk, not to a calendar habit.<\/li>\r\n<\/ol>\r\nLoadView fits this shape because it is fully cloud-hosted: a small IT team runs real-browser and API load tests without standing up load generators, and every run exports a dated report. For an institution leaning on vendors, the same approach validates the member-facing side of a <a href=\"https:\/\/www.loadview-testing.com\/blog\/test-transaction-concurrency-in-fintech\/\">transaction concurrency<\/a> question that Appendix J expects you to be able to answer.\r\n\r\nSee how LoadView helps banks and credit unions produce the load testing evidence an examiner reads. <a href=\"https:\/\/www.loadview-testing.com\/demo\/\">Schedule a LoadView demo<\/a> to test your digital banking front door at your real peak.\r\n<h2 id=\"the-bottom-line\">The Bottom Line<\/h2>\r\nFFIEC guidance does not grade you against a number. It grades you against judgment: whether you found the systems that matter, learned how they behave under load, and kept evidence that you acted. An examiner reading a dated load test report, tied to a real member flow and a clear pass or fail line, sees exactly that.\r\n\r\nCover your digital front door first, size the effort to your risk, and keep the reports. Do that, and the plain question across the exam table, how did you know it would hold, has a plain answer you can hand over.\r\n<h2 id=\"frequently-asked-questions\">Frequently Asked Questions<\/h2>\r\n<h3>Is the FFIEC a Regulator?<\/h3>\r\nNo. The FFIEC is an interagency body of the OCC, FDIC, Federal Reserve, NCUA, and CFPB, plus a State Liaison Committee. It sets uniform principles and publishes the IT Examination Handbook, and the member agencies examine banks and credit unions against that guidance. You are examined on FFIEC guidance by your primary regulator rather than fined by the FFIEC itself.\r\n<h3>Does FFIEC Guidance Require Load Testing?<\/h3>\r\nNot as a line-item mandate. FFIEC guidance is principles-based. But the Architecture, Infrastructure, and Operations booklet expects capacity management and performance monitoring, and the Business Continuity Management booklet expects resilience testing, both scaled to the institution's size and complexity. Load and stress testing are the practical way to show those systems hold up.\r\n<h3>Which FFIEC Booklets Cover Capacity and Load Testing?<\/h3>\r\nThe Architecture, Infrastructure, and Operations booklet covers capacity management and performance monitoring. The Business Continuity Management booklet covers resilience testing and exercises. The Development, Acquisition, and Maintenance booklet covers testing before deployment. And the Outsourcing Technology Services booklet, with Appendix J, covers the resilience of services you run through a vendor.\r\n<h3>How Much Load Testing Does a Small Community Bank or Credit Union Need?<\/h3>\r\nAs much as your risk warrants. FFIEC guidance asks that test methods be commensurate with the size and complexity of the institution and the criticality of the function. A small institution running packaged online banking does not need an exchange's test program, but it does need to understand and validate the systems its members depend on, especially the digital front door.\r\n<h3>How Does LoadView Help Banks and Credit Unions With FFIEC Exams?<\/h3>\r\nLoadView load tests digital banking the way a member uses it, in a real browser, and tests the API endpoints behind it. It is fully cloud-hosted, so a small IT team has no load-generation infrastructure to build, and it exports dated performance reports with response times and error rates that become the evidence an examiner reviews.\r\n<!-- JSON-LD: FAQPage -->\r\n<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [\r\n    {\r\n      \"@type\": \"Question\",\r\n      \"name\": \"Is the FFIEC a Regulator?\",\r\n      \"acceptedAnswer\": {\r\n        \"@type\": \"Answer\",\r\n        \"text\": \"No. The FFIEC is an interagency body of the OCC, FDIC, Federal Reserve, NCUA, and CFPB, plus a State Liaison Committee. It sets uniform principles and publishes the IT Examination Handbook, and the member agencies examine banks and credit unions against that guidance. 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