On 24/01/2012 21:01, David Rees wrote: > On Mon, Jan 23, 2012 at 11:53 PM, Pid * <p...@pidster.com> wrote: >> On 23 Jan 2012, at 21:12, David Rees <dree...@gmail.com> wrote: >>> On Tue, Oct 11, 2011 at 6:42 AM, Mark Thomas <ma...@apache.org> wrote: >>>> I have added a patch based on the previous patches that adds: >>>> - threaded start/stop for Contexts >>>> - threaded start/stop for Hosts >>>> - threaded deployment >>>> >>>> Control over the number of threads is via server.xml and/or JMX. This >>>> can be changed dynamically. >>>> >>>> Review, feedback, testing etc. welcome. >>>> >>>> With 4 threads rather than the current 1 (on a 8-core machine), I saw a >>>> 20-25% improvement in start time with a large number of Contexts that >>>> all start quickly. I'd expect to see better results in situations where >>>> 1 few Contexts start slowly but most are quick. >>> >>> Resurrecting an old thread, but I've started using this in Tomcat >>> 7.0.25 with good results - have a Tomcat instance used for testing >>> with a couple dozen contexts that take a while to load each, but with >>> startStopThreads bumped up it reduces startup time from 60 seconds to >>> 20 seconds using all available CPU cores. Very helpful! >> >> That's great - and thanks for letting us know. >> >> If you have time, I think it would be interesting to know your >> application sizes, individual startup time and how many >> startStopThreads you are using. > > On this example there's about 30 webapps, each war file ranges between > 30-60MB. Single threaded startup, each application takes about 2 > seconds to start up. This is on a warm restart, webapps already > deployed, cold restarts are slower if the server has to read from > disk.
Awesome, thanks. > The system has 8 CPU cores, Opteron 2378 CPU. Going beyond 4 > startStopThreads for the host where the webapps are deployed doesn't > speed things up much more as it appears that the webapps can use up to > 2 cores when initializing as seen in single threaded startup mode. In single threaded startup mode, the process uses 2 cores? You refer to system and host separately, is it virtualised? > Going to 6 threads pretty much maxed it out, but I've left it set to 7. :) p -- [key:62590808]
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