I have seen from another post, and from http://www.orbeon.com/ops/doc/home-faq#app-server-hangs
a recommendation to reduce the value of maxThreads. The actual value proposed (3 or 4) seems very low
indeed – what’s people’s experience with tuning Tomcat for
running OPS by modifying these values? We’re currently still with the defaults (on
Tomcat 5.0.28, maxThreads is 150, acceptCount is 100) and we do get situations
where the server seems to hang (or at least sits at 100% CPU for some time). Steve -- You receive this message as a subscriber of the [hidden email] mailing list. To unsubscribe: mailto:[hidden email] For general help: mailto:[hidden email]?subject=help ObjectWeb mailing lists service home page: http://www.objectweb.org/wws |
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Hi Stephen,
In most of the cases we have seen so far, a good strategy is to set the maximum number of "threads" or "processors" to just slightly more than the number of CPUs you have. This strategy applies broadly to web applications, not only to PresentationServer. There is a good discussion about this in the WebLogic Performance and Tuning documentation: http://e-docs.bea.com/wls/docs81/perform/WLSTuning.html#1140013 Alex On 2/17/06, Stephen Bayliss <[hidden email]> wrote: > > > > I have seen from another post, and from > http://www.orbeon.com/ops/doc/home-faq#app-server-hangs a > recommendation to reduce the value of maxThreads. > > > > The actual value proposed (3 or 4) seems very low indeed – what's people's > experience with tuning Tomcat for running OPS by modifying these values? > > > > We're currently still with the defaults (on Tomcat 5.0.28, maxThreads is > 150, acceptCount is 100) and we do get situations where the server seems to > hang (or at least sits at 100% CPU for some time). > > > > Steve > > -- > You receive this message as a subscriber of the [hidden email] > mailing list. > To unsubscribe: mailto:[hidden email] > For general help: mailto:[hidden email]?subject=help > ObjectWeb mailing lists service home page: http://www.objectweb.org/wws > > > -- Blog (XML, Web apps, Open Source): http://www.orbeon.com/blog/ -- You receive this message as a subscriber of the [hidden email] mailing list. To unsubscribe: mailto:[hidden email] For general help: mailto:[hidden email]?subject=help ObjectWeb mailing lists service home page: http://www.objectweb.org/wws
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In reply to this post by Stephen Bayliss
Thanks Alex.
We've reduced the number of maxThreads on the server and will see what effect it has. I can certainly see that a large number of concurrent threads all handling similar requests will probably run slower than executing those requests sequentially. Steve -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Alessandro Vernet Sent: 22 February 2006 23:15 To: [hidden email] Subject: Re: [ops-users] Tomcat configuration: maxThreads, acceptCount Hi Stephen, In most of the cases we have seen so far, a good strategy is to set the maximum number of "threads" or "processors" to just slightly more than the number of CPUs you have. This strategy applies broadly to web applications, not only to PresentationServer. There is a good discussion about this in the WebLogic Performance and Tuning documentation: http://e-docs.bea.com/wls/docs81/perform/WLSTuning.html#1140013 Alex On 2/17/06, Stephen Bayliss <[hidden email]> wrote: > > > > I have seen from another post, and from > http://www.orbeon.com/ops/doc/home-faq#app-server-hangs a > recommendation to reduce the value of maxThreads. > > > > The actual value proposed (3 or 4) seems very low indeed - what's > experience with tuning Tomcat for running OPS by modifying these > > > > We're currently still with the defaults (on Tomcat 5.0.28, maxThreads is > 150, acceptCount is 100) and we do get situations where the server seems to > hang (or at least sits at 100% CPU for some time). > > > > Steve > > -- > You receive this message as a subscriber of the [hidden email] > mailing list. > To unsubscribe: mailto:[hidden email] > For general help: mailto:[hidden email]?subject=help > ObjectWeb mailing lists service home page: http://www.objectweb.org/wws > > > -- Blog (XML, Web apps, Open Source): http://www.orbeon.com/blog/ -- You receive this message as a subscriber of the [hidden email] mailing list. To unsubscribe: mailto:[hidden email] For general help: mailto:[hidden email]?subject=help ObjectWeb mailing lists service home page: http://www.objectweb.org/wws |
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