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Re: shmctl EIDRM preventing startup

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On Sun, Jul 01, 2007 at 10:39:01PM -0400, Tom Lane wrote:
> Alvaro Herrera <alvherre@xxxxxxxxxxxxxxxxx> writes:
> > Maybe what is happening is that an entirely unrelated process created a
> > segment with that ID, attached to it, and then it was deleted.  I don't
> > know how to check however.
> 
> AFAIK, EIDRM should imply that the segment has been IPC_RMID'd but still
> exists because there are still processes attached to it.  So the thing
> to look for is processes still attached.  Not 100% sure how to do that,
> but I'm sure the info is exposed under /proc somehow...

If it's installed, this:

lsof |grep SYSV

Will list all processes attached to a SHM segemtn on the system. I
think ipcs can do the same. You can grep /proc/*/maps for the same
info.

Have a nice day,
-- 
Martijn van Oosterhout   <kleptog@xxxxxxxxx>   http://svana.org/kleptog/
> From each according to his ability. To each according to his ability to litigate.

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