Marcy, thanks for the pointers. I verified that the thread pool default/max 
numbers are the same, and the async I/O box remains unchecked. The swap space 
used stays at 0 for a day or two, but slowly climbs. There are also dips but it 
never returns to 0 until reboot. The WebSphere java proc grows from 800M to 
1200M RES in that time. I suppose it's also possible we have some WebSphere 
user code that's not behaving as expected.  

Ray  

> -----Original Message-----
> From: Linux on 390 Port [mailto:[email protected]] On 
> Behalf Of Marcy Cortes
> Sent: Wednesday, June 23, 2010 11:12 AM
> To: [email protected]
> Subject: Re: Memory use question
> 
>  
> It's called a native memory leak.
> Lots of things can cause it.
> Thread pools, asynci i/o are two areas where this can happen.
> See http://www-01.ibm.com/support/docview.wss?uid=swg21368248
> Also http://www-01.ibm.com/support/docview.wss?uid=swg21373312
> 
> You may have to open a PMR to get IBM to assist.
> 
> Marcy 
> 

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