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
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_W_WKW__WK________..............................................
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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
Quote:
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>
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Our workers.properties file looks like this (apex is an example of one worker for jboss insatnce. Like this tehre are many workers)
Quote:
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
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Any help much appreciated!
Thanks,
Ravi
