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kernel pool memory

Hi all,

I have two machines with Windows Server 2003 sp2 running a GigaSpaces 6.0 cluster with partitioned-sync2backup schema as EDG. Network configuration: two networks 192.168.1.x and 192.168.2.x, each server is connected two both networks with separate network card. First network 192.168.1.x is used for MS NLB cluster. Second network 192.168.2.x is used for GigaSpaces cluster. Doing some tests and monitoring with poolmon, I noticed that afdp tag of afd.sys driver is growing permanently in kernel non-paged pool memory, until it takes all available non-paged pool memory. My questions are: 1. Did anyone encounter such problem? 2. Can it be related to GigaSpaces?


{quote}This thread was imported from the previous forum. For your reference, the original is [available here|http://forum.openspaces.org/thread.jspa?threadID=2628]{quote}

asked 2008-09-30 08:48:44 -0500

updated 2013-08-08 09:52:00 -0500

jaissefsfex gravatar image
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Sounds as problem resolved with newer versions when performing read of large objects or using JDK 1.4. Can you run your application with GigaSpaces 6.6 and JDK 6.0 and see if this problem manifest itself?

In case you still got this problem , use JDK 6.0 jmap command to capture the JVM memory dump and send it to support. See: http://java.sun.com/j2se/1.5.0/docs/t... .


answered 2008-09-30 17:00:10 -0500

shay hassidim gravatar image
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What size of object have to be considered large ?

answered 2008-10-01 02:30:06 -0500

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Larger than 1M.

If you must use 6.0 you might need to configure the following JVM settings: -XX:SoftRefLRUPolicyMSPerMB -XXMaxDirectMemorySize

I would start with this: -XX:SoftRefLRUPolicyMSPerMB=10 Please this both for the client and space JVM.

It might be related to this: http://bugs.sun.com/bugdatabase/view_...

Running your application with GigaSpaces 6.6 and latest JDK 6.0 will allow us to know where is the problem.


shay hassidim gravatar imageshay hassidim ( 2008-10-01 18:13:19 -0500 )edit

I have tested my application with GigaSpaces 6.6 and it seems that problem has gone.

Thank You for you reply.

Edited by: Pavel Gurencov on Oct 3, 2008 7:11 AM

answered 2008-10-03 07:10:01 -0500

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Asked: 2008-09-30 08:48:44 -0500

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Last updated: Oct 03 '08