On 05/10/17 21:36, Jerry Malcolm wrote: > 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.
Is this the OS memory or what you have allocated to Java? > 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 > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
