OOM killer "Out of Memory: Killed process" SOLUTIONS / SUMMARY

[Cristian Silva]

64bits is not an option cause we have some applications (homemade)  that are
not 64bits compatible,  there's a chance to migrate them to 64 but nothing
in the short term.

I configured the kernel to use less memory now, so ill see how it goes and
ill post my results.


cheers,
C

On 8/20/07, Eric Sisler <esisler at westminster.lib.co.us> wrote:
>
> On Mon, 2007-08-20 at 12:06 -0400, Cristian Silva wrote:
>
> > Sorry, forgot to mention that we are getting the oom-killer with another
> > application, we are not using VMware.
>
> The actual application is pretty much irrelevant once the oom-killer is
> involved.
>
> > The total low memory reported by the PAE and the normal kernel are the
> same
> >
> > PAE
> > # free -lm
> >              total       used       free     shared    buffers
> cached
> > Mem:          7994        348       7646          0
> 70        179
> > Low:           827        102        724
> > High:         7167        245       6922
> > -/+ buffers/cache:         98       7896
> > Swap:         4094          0       4094
> > #
> >
> >
> > Normal
> > # free -lm
> >              total       used       free     shared    buffers
> cached
> > Mem:          3930        309       3621          0
> 17        196
> > Low:           859         47        811
> > High:         3071        261       2810
> > -/+ buffers/cache:         95       3835
> > Swap:         4094          0       4094
> > #
> >
> > Both commands were executed just after a reboot of the system and it's
> > interesting to see that the used low memory in the PAE kernel is the
> double
> > of the  used low memory in a  "normal"  kernel
>
> There's also slightly less low memory when running PAE, but obviously
> way more high memory since the regular kernel is limited to 4Gb.  My
> understanding is that the PAE kernel *should* be roughly equivalent to
> the RHEL4 hugemem kernel, but unfortunately this doesn't seem to be the
> case.  Per my earlier post, low memory on a box running RHEL4 jumped
> significantly when running the hugemem kernel.  I wonder why this isn't
> the case when using the RHEL5 PAE kernel?  Unfortunately I don't have
> any speare hardware to experiment with at the moment.
>
> > We already tried the parameters that Ray suggested and they didnt make
> any
> > difference.
> >
> > vm.lower_zone_protection is not available in the rhel5, so we are going
> to
> > try with less memory and see what it happens.
> >
> > Thanks all for the information/suggestions, this thread has been
> excellent.
>
> You mentioned 64-bit wasn't an option at the moment...any chance it migh
> be?  When I installed 64-bit RHEL4, it also installed the 32-bit
> versions of many packages and thus far I haven't had any issues.
>
> -Eric
>
> --
> Eric Sisler <esisler at westminster.lib.co.us>
> Library Network Specialist
> Westminster Public Library
> Westminster, CO USA
>
> Linux - Don't fear the Penguin.
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