Re: linux, memory (mis)accounting/reporting, and the planner/optimizer

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On Wed, 21 Jan 2009, M. Edward (Ed) Borasky wrote:

Re the OOM killer -- maybe a patch to the kernel could make things
"better"??

People have tried to raise awareness of it; sample:

http://lkml.org/lkml/2007/2/9/275

without much success. The Linux kernel hackers dislike the whole approach PostgreSQL uses to allocate shared memory anyway--witness the backlash against any attempt to raise SHMMAX.

I found the long thread that beats this issue to death in the archives again:

http://archives.postgresql.org/pgsql-hackers/2008-02/msg00026.php

That discussion should get raised to a higher profile eventually, maybe a summary on the wiki.

--
* Greg Smith gsmith@xxxxxxxxxxxxx http://www.gregsmith.com Baltimore, MD

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