Re: Out of Memory: Killed process 16498 (java).

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On Thursday 19 January 2006 19:56, Andrew Morton wrote:
> "Andy Chittenden" <[email protected]> wrote:
> > Why does running the following command cause processes to be killed:
> >
> > 	dd if=/dev/zero of=/u/u1/andyc/tmpfile bs=1M count=8k
> >
> > And I noticed one of my windows disappeared. Further investigation
> > showed that was my terminator window (java based app: see
> > http://software.jessies.org/terminator/). I found this in my syslog:
> >
> > Jan 17 11:12:58 boco kernel: Out of Memory: Killed process 16498 (java).
> >
> > My hardware: amd64 based machine (ASUS A8V Deluxe motherboard) with 4Gb
> > of memory.
> > My kernel: debian package linux-image-2.6.15-1-amd64-k8 package
> > installed. IE its running 2.6.15 compiled for amd64.
> >
> > This is repeatable. The above dd command also causes the machine to
> > become very unresponsive (eg windows don't focus).
>
> What type of filesytem is being written to?
>
> Has someone tuned /proc/sys/vm/swappiness, or something else under
> /proc/sys/vm?
>
> It'd be useful to see the dmesg output from that oom event.

Are you using scsi? Someone just posted what looks to be a scsi slab leak (Re: 
scsi cmd slab leak? (Was Re: [ck] Anyone been having OOM killer problems 
lately?) that causes oom kills. Check your slabinfo for a large 
scsi_cmd_cache.

Cheers,
Con
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