tomcat-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Martin Gainty" <mgai...@hotmail.com>
Subject Re: PS Old Gen filling up...
Date Wed, 12 Jul 2006 15:45:56 GMT
Darren/Edmon-
Can you turn on trace facilities for GC in the jvm.cfg?
e.g.
      1.3.1 1.4.1 
      -Xtgc2 -Dibm.dg.trc.print=st_verify 
      -Xtgc34 -Dibm.dg.trc.print=st_compact_verbose,st_verify 

More info avilable at 
http://publib.boulder.ibm.com/infocenter/wasinfo/v4r0/index.jsp?topic=/com.ibm.support.was40.doc/html/Java_SDK/swg21162875.html

Martin--
*********************************************************************
This email message and any files transmitted with it contain confidential
information intended only for the person(s) to whom this email message is
addressed.  If you have received this email message in error, please notify
the sender immediately by telephone or email and destroy the original
message without making a copy.  Thank you.



----- Original Message ----- 
From: "Edmon Begoli" <ebegoli@gmail.com>
To: "Tomcat Users List" <users@tomcat.apache.org>
Sent: Wednesday, July 12, 2006 10:43 AM
Subject: Re: PS Old Gen filling up...


> Darren,
> 
> Old Gen filling up is usually an indicator of a memory leak.
> 
> Other possibility is that object creation is very fast and that
> garbage collector can not keep up.  Since you are using parallel
> collector it is also a possibility that it needs some tweaking.
> 
> The Recalcitrant Engineer ( http://www.burnthacker.com ) blog has a
> good post somewhere on tweaking the parallel connector.  Site seems to
> be too busy now so I can't find it.
> 
> Regards,
> Edmon
> 
> On 7/12/06, Darren Kukulka <Darren.Kukulka@connaught.plc.uk> wrote:
>> Hi All,
>>
>>
>>
>> Got a situation here where PS Old Gen within the JVM heap is gradually
>> filling up and locking to a point where GC will not release any of it and
>> the application hangs.
>>
>>
>>
>> Running Tomcat 5.5.15 and SUN JDK 1.5_07.
>>
>>
>>
>> Machine is an 8GB dual Xeon processor Dell 2850.
>>
>>
>>
>> The JVM options are set as follows;
>>
>>
>>
>> -Dcatalina.home=F:\tomcat5
>>
>> -Dcatalina.base=F:\tomcat5
>>
>> -Djava.endorsed.dirs=F:\tomcat5\common\endorsed
>>
>> -Djava.io.tmpdir=F:\tomcat5\temp
>>
>> -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
>>
>> -Djava.util.logging.config.file=F:\tomcat5\conf\logging.properties
>>
>> -Duser.language=en
>>
>> -Duser.country=GB
>>
>> -Xms1330m
>>
>> -Xmx1330m
>>
>> -XX:+UseParallelGC
>>
>> -XX:ParallelGCThreads=2
>>
>> -XX:+UseParallelOldGC
>>
>> -XX:+UseAdaptiveSizePolicy
>>
>> -XX:NewSize=400m
>>
>> -XX:MaxNewSize=400m
>>
>> -XX:PermSize=128m
>>
>> -XX:MaxPermSize=128m
>>
>>
>>
>> Has anyone had similar behaviour or can you point me in the right direction?
>>
>>
>>
>> Thanks in advance.
>>
>>
>>
>> Darren Kukulka
>>
>>
>>
>>
>>
>>
>>
>> Connaught honoured AIM 'Decade of Excellence' Award
>>
>>
>>
>> Connaught awarded Partnering Contractor of the Year 2005
>>
>>
>>
>> Connaught wins AIM 'Company of the Year' award 2004
>>
>>
>>
>> West of England Business of the Year Award Winner 2003
>>
>>
>>
>> Why not visit our website http://www.connaught.plc.uk
>>
>>
>>
>> Disclaimer:
>>
>> The information transmitted is intended only for the person or entity to which it
is addressed and may contain confidential and/or privileged material. Any review, retransmission,
dissemination or other use of, or taking of any action in reliance upon, this information
by persons or entities other than the intended recipient is prohibited. If you received this
in error, please contact the sender and delete this message.
>>
>>
>>
>> Connaught plc, Head Office 01392 444546
>>
>>
> 
> 
> -- 
> Thank you,
> Edmon Begoli
> http://blogs.ittoolbox.com/eai/software
> 
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
> 
>
Mime
View raw message