I am running TC 8.0 on WinServer8 on a commercially hosted platform with
a WAMP environment. I am running around 10 virtual hosts. 2 hosts
are dedicated to JSPWiki. The other 8 are running variations of the
same custom application with around 10-15 individual webapps each.
When I am running 7 of the 10 hosts, performance is great. I get JSP
response time under a second. But when I add just a couple of more of
the hosts, my page response time on all of the apps goes from an
acceptable under a second to horrible at around 15-20 seconds per page.
It doesn't seem to be a specific host causing the problem. Reducing
overall hosts in any order makes the problem go away.
I've looked at the the processor utilization during the good times and
slow times, and don't see a significant difference. I have 16GB of
memory, and it consistently shows about 35% utilization. I also checked
mySQL response time, and the per-query SQL response does not vary. So
it doesn't appear to be a db problem.
I suspect there is some TC configuration parameter such as heap, etc
that I need to tweak. (But I'm not getting OutOfMemory errors). But I
don't know which one, and I don't know a formula to use to figure out
what to set it to. So I just need a little education. What tools can I
use to help me figure out what is going south slowing everything to a
crawl when the extra hosts come online? And what parameters should I be
looking at (and how should I calculate the proper values based on number
of hosts)?
Suggestions?
Thanks.
Jerry
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
