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Tomcat6 + mod_jk + Apache SSL Performance Tuning

I need an expert on apache/tomcat for tuning a web application which is currently struggling in an environment with enough resources.

The infrastructure envolved is an Apache [url removed, login to view] + OpenSSL with mod_jk [url removed, login to view] as frontend/loadbalancer/ssl termination with Tomcat [url removed, login to view] in the backend, with an application that uses Sun JVM 1.6 and BlazeDS.

I don't considering not knowing the apps will be an issue. Currently 95% of settings are default in apache.

Currently, just 40 concurrent users cause major troubles on the platform, while CPU, Memory, Disk and network resources are almost idle. This seems to be a configuration/performance tuning issue.

I expect benchmarks to compare before/after conditions, and briefing of parameters modified.

I offer chat, video & phone communication, and ssh access to servers involved.

Current architecture is Linux Centos 5.5 x86_64 kernel 2.6.18

Evner: Apache, System Administrator

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Om arbejdsgiveren:
( 1 bedømmelse ) dublin, Ireland

Projekt ID: #1001385