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Subject: RE: Upgrade to 5.0.27 Causes Performance Problems
Date: Thu, 2 Sep 2004 13:01:57 +0100
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Thread-Topic: Upgrade to 5.0.27 Causes Performance Problems
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From: "Allistair Crossley" <Allistair.Crossley@QAS.com>
To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
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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 thi=
s 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
>=20
>=20
> Upgrading to Tomcat 5.0.27 on Solaris 8, from 3.3 (a big=20
> jump, I know),
> and in live use we're seeing its CPU usage run away after a=20
> few minutes.
> If I use prstat -L to look at the individual threads, it's=20
> 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=20
> including
> a line like "VM Thread" prio=3D5 tid=3D0x00126830 nid=3D0x2=20
> runnable", which I
> believe is the java/2 thread, but with no stack trace for that thread.
>=20
> Does anyone have any ideas about what's going on, or any other
> diagnostics to try?
>=20
> --=20
> Mike Scott
>=20
> ______________________________________________________________
> __________
> This email has been scanned for all viruses by the=20
> MessageLabs service.=20
> ______________________________________________________________
> __________
>=20
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>=20
>=20


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