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From "Allistair Crossley" <Allistair.Cross...@QAS.com>
Subject RE: Upgrade to 5.0.27 Causes Performance Problems
Date Thu, 02 Sep 2004 12:01:57 GMT
Hi Mike,

The standard-fare answer to this type of question is to get a profiler and measure where the
cpu is going inside the code itself. did you not test this on your development server before
launching the upgrade?

ADC

> -----Original Message-----
> From: Mike Scott [mailto:mike.scott@Rightmove.co.uk]
> Sent: 02 September 2004 12:51
> To: tomcat-user@jakarta.apache.org
> Subject: Upgrade to 5.0.27 Causes Performance Problems
> 
> 
> Upgrading to Tomcat 5.0.27 on Solaris 8, from 3.3 (a big 
> jump, I know),
> and in live use we're seeing its CPU usage run away after a 
> few minutes.
> If I use prstat -L to look at the individual threads, it's 
> java/2 that's
> getting all the CPU time. If I then send the java process a SIGQUIT
> signal to get it to dump a complete stack trace, I get output 
> including
> a line like "VM Thread" prio=5 tid=0x00126830 nid=0x2 
> runnable", which I
> believe is the java/2 thread, but with no stack trace for that thread.
> 
> Does anyone have any ideas about what's going on, or any other
> diagnostics to try?
> 
> -- 
> Mike Scott
> 
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