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From "Angus Mezick" <amez...@guidestar.org>
Subject RE: JVM Profilers
Date Wed, 11 Jun 2003 20:17:04 GMT
Jvmstat at http://developers.sun.com/techtopics/emergingtech/ is rather
cute.

> -----Original Message-----
> From: Roman Fail [mailto:rfail@posportal.com] 
> Sent: Wednesday, June 11, 2003 4:11 PM
> To: tomcat-user@jakarta.apache.org
> Subject: JVM Profilers
> 
> 
> I am considering purchase of JProfiler, OptimizeIt 5.5, or 
> JProbe.  Does anyone have wisdom to share on the features of 
> each?  Are there other good profilers I should consider?
>  
> We have been experiencing regular JVM crashes on our 
> production Tomcat 4.1.24 installation.  Originally we were 
> running the Sun HotSpot 1.4.1_02 client, then server (on RH 
> Linux 8.0).  Now we've switched to BEA JRockit 8.1 and are 
> still having crashes, clearly something is bad in our code - 
> or perhaps we need to start load-balancing.  We have tuned 
> obvious kernel parameters like file-max, and have 2GB 
> physical memory (1GB is given to tomcat's heap), dual Intel 
> processors.  Besides a few small Java-based daemons on the 
> server, it is dedicated to tomcat.
>  
> We recently migrated from a Windows 2000/ServletExec 3.1/Sun 
> HotSpot client 1.3.1 environment which didn't have these 
> problems - I'm not sure what to think at this point.  
>  
> Please reply directly to me (and cc the list) as I receive 
> only the digest version.
>  
> Thanks!
>  
> Roman Fail
> POS Portal, Inc.
> Sacramento, CA USA
> 

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