[opencms-dev] OpenCMS hangs under heavy load

[Mark Belanger]

Greetings all,

We have a site which gets over a million visitors a month at peak and 
regularly pushes a T1 in concurrent bandwidth.  It's running OpenCMS 
5.0.1 on RHEL 3.0 with Tomcat 4.1.31 and J2SDK 1.4.2.  The site has a 
number of dynamic pages, but they are kept in the flex cache and change 
only a few times a day, where they are re-cached.

Unfortunately, we've been seeing complete lockups of Java when an end 
user tries to login and publish even a single file.  This doesn't occur 
when the load is lower in the evening.  On a hang, what is normally a 
single Java process consuming about 50% of the CPU becomes two Java 
processes consuming ~25% each.  At this point, the load shoots up to 2+ 
and the dynamic portions of the site become totally unresponsive for 
anywhere between 2 and 5 minutes.

Has anyone else seen this kind of issue?


Thanks much,
-MB
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_______________________________________________________________________
Mark Belanger - belanger at fluid.com