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We have a very high traffic website that is increasing
in it's traffic. Yesterday we had 41,000 unique
visitors for over 2.9 million "hits". That number is
expceted to increase over the coming weeks.
The problem is we are seeing as many as 500-750 of
WAIT status in netstat -a, so naturally we wanted to
up the max children to 500-750 to accommodate this
observation. When we do this, we see a marked increase
in the number of concurrent requests we can handle and
much better performance of the app, but as we break
the 200 concurrent connections mark, JServ just gives
up with the java process gang just disappearing from
the process table, leaving no core and nothing in the
logs. Of course we are running using Native threads.
We are limping along right now under the load trying
to load balance servers right now with a Local
Director. We have tried:
1) increasing the max stack and max heap size to
2/256MB
2) switched VMs and OSs
3) turned off JIT
ENVIRONMENT:
Software: Apache 1.3.9 with JServ 2.0 as a DSO
Operating System: tried on Solaris 2.7 and Linux RH6.0
JVM: Sun's JDK 1.1.8 and IBM's JDK 1.1.8 for Linux
Hardware: Sun E350 with 512k RAM and Compaq Proliant
PIII dual 500 with 512k RAM
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# Nick Bauman
# Technical Programmer
# http://webhelp.com
# real people, real answers, real time
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