yes, we're using ssl,
On Thu, Apr 19, 2012 at 2:43 PM, Simone Bordet <[email protected]> wrote: > Hi, > > On Thu, Apr 19, 2012 at 01:41, Devon Lazarus <[email protected]> > wrote: > > Hi, > > > > > > > > I’ve been trying to get to the bottom of what I believe is a performance > > problem in a Jetty application. Unfortunately, I’ve hit a road block and > > could use some help. Googling hasn’t shed any light on the issue. Neither > > has stackoverflow. > > > > > > > > Basically, I’m seeing very high CPU load without a lot of throughput. To > > quantify that, we have a c1.medium (dual core) running Ubuntu 10.04LTS in > > EC2 with Jetty 7.6.2 configured at 50 min/200 max threads, a single > > acceptor, and the Oracle JDK 1.7_03 JVM configured with -mx2048m –ms512m, > > and some GC tuning. > > > > > > > > We’re using a custom load generation tool to find the point at which the > > server falls over. However, we’re hitting 90% CPU burn with loads well > over > > 2 while handling ~25 concurrent transactions/second (throughput was 63 > tps > > with ~400ms response times). That just doesn’t seem right (way too low). > > > > > > > > In profiling the JVM regardless of load (low or under siege), we can see > > clearly that 99% of our CPU time is spent in one of two places: > > > > > > > > sun.nio.ch.SelectorImpl.select() at 66% > > > > sun.nio.ch.ServerSocketChannelImpl.accept() at 33% > > Are you using SSL ? > > We have fixed a couple of issues regarding threads spinning in 7.6.3. > Is there any chance you can try that version out ? > > If you still get the same behavior in 7.6.3, then we're really > interested in knowing more details. > > Thanks, > > Simon > -- > http://cometd.org > http://intalio.com > http://bordet.blogspot.com > ---- > Finally, no matter how good the architecture and design are, > to deliver bug-free software with optimal performance and reliability, > the implementation technique must be flawless. Victoria Livschitz > _______________________________________________ > jetty-users mailing list > [email protected] > https://dev.eclipse.org/mailman/listinfo/jetty-users >
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