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From Rainer Jung <rainer.j...@kippdata.de>
Subject Re: tomcat 6.0 bottleneck
Date Tue, 05 Oct 2010 14:09:51 GMT
On 05.10.2010 15:27, mamalacation wrote:
>
> n828cl,
>
>
> n828cl wrote:
>>
>>
>> Pretty much guaranteed that it's not Tomcat but your webapp that is
>> locking itself out of access to some resource (such as the database).
>> Take several thread dumps during the slowdown period and see what's going
>> on.
>>
>> http://wiki.apache.org/tomcat/HowTo#How_do_I_obtain_a_thread_dump_of_my_running_webapp_.3F
>> http://wiki.apache.org/tomcat/FAQ/Performance_and_Monitoring
>>
>> BTW, tell us the *exact* Tomcat version, and the JVM level you're running
>> on.
>>
>>
>
> as far as the version as concerned:
>
> Tomcat Version:  6.0.26 	
> JVM Version : 1.6.0_20-b02

Update to 1.6.0_21, there's a serious bug in 20 concerning string 
functions on certain types of x86 CPUs.

Not saying this is reason for anything you observe, it's just not a 
solid base.
	
> JVM Vendor : Sun Microsystems Inc.
>
> I will look at the links you proposed to see what's going on with my
> webapps, but I am pretty sure that there must be some limit somewhere that I
> can't see.
>
> Where can I set the database options regarding timouts, pool size,
> max_database_connections, etc?

Regards,

Rainer

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