We are facing an issue with Apache not being able to serve all the requests efficiently. In server satus page I can see there are many requests currently waiting for JBoss instances to respond. We are using mod_jk connector to load balance JBoss instances across two datacenters. Due to this issue we are facing some URLs being inaccessible. 240 requests currently being processed, 34 idle workers WWWWWWW_WWW_WWWWWW_WKWWW_WWWW__W_W_WWWWWWWWWWWWWWWWWWWWWWWWWWWWW WWWWWWWWWWWWWWWWWWWWW_WWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW_WWW WWWK_WWW_WWWWWWWWWWWWWWWW_WWWWWWWWWWWW_WWWWWWWWWWWWWWWWWWWWWWWWW WWWWWWWWWWWWWW_WWWWWKWWWWWWW_W__WWWWWWWWWWKWWWWWWWWKW_W_WWW_W_KW _W_WKW__WK________.............................................. ................................................................ ................................................................ ................................................................ ................................................................ I am not sure if we are missing on something or some performance tuning parameters. Below are few params in configuratin file of Apache https.conf Timeout 120 KeepAlive On MaxKeepAliveRequests 100 KeepAliveTimeout 15 <IfModule prefork.c> StartServers 8 MinSpareServers 5 MaxSpareServers 20 ServerLimit 1024 MaxClients 1024 MaxRequestsPerChild 4000 </IfModule> <IfModule worker.c> StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> LoadModule jk_module /opt/jfarm/apache-modules/mod_jk-linux-x64/mod_jk-1.2.28-httpd-2.2.X.so <VirtualHost *:80> DocumentRoot /etc/httpd/htdocs CustomLog "|/usr/sbin/rotatelogs /var/log/httpd/access_log 10M" common ErrorLog /var/log/httpd/error_log JkMount /jkstatus jkstatus </VirtualHost> <VirtualHost *:80> ServerName jfarm-apex-int-jb.nomura.com ServerAlias jfarm-apex-int-jb JkMount /* lb-apex-integration CustomLog "|/usr/sbin/rotatelogs /opt/jfarm/apache/logs/apex-integration.access.log 10M" common ErrorLog /opt/jfarm/apache/logs/apex-integration.error.log </VirtualHost> Our workers.properties file looks like this (apex is an example of one worker for jboss insatnce. Like this tehre are many workers) worker.list=jkstatus worker.jkstatus.type=status worker.basic.connection_pool_timeout=600 worker.basic.socket_keepalive=1 worker.apex-integration1.host=server1 worker.apex-integration1.port=12252 worker.apex-integration1.type=ajp13 worker.apex-integration1.lbfactor=1 worker.apex-integration2.host=server2 worker.apex-integration2.port=12252 worker.apex-integration2.type=ajp13 worker.apex-integration2.lbfactor=1 worker.lb-apex-integration.type=lb worker.lb-apex-integration.balance_workers=apex-integration1,apex-integration2 worker.lb-apex-integration.sticky_session=1 worker.list=lb-apex-integration worker.lb-apex-integration.reference=worker.basic Any help much appreciated! Thanks, Ravi