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Re: ERROR: out of memory DETAIL: Failed on request of size ??? - Mailing list pgsql-general

From bricklen
Subject Re: ERROR: out of memory DETAIL: Failed on request of size ???
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Msg-id CAGrpgQ9L3knTrgBXHqpLmh+LB8jgkLoTt6Ub87_nGEGH6-07xA@mail.gmail.com
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In response to ERROR: out of memory DETAIL: Failed on request of size ???  (Brian Wong <bwong64@hotmail.com>)
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On Mon, Nov 18, 2013 at 12:40 PM, Brian Wong <bwong64@hotmail.com> wrote:
We'd like to seek out your expertise on postgresql regarding this error that we're getting in an analytical database.

Some specs:
proc: Intel Xeon X5650 @ 2.67Ghz dual procs 6-core, hyperthreading on.
memory: 48GB
OS: Oracle Enterprise Linux 6.3
postgresql version: 9.1.9
shared_buffers: 18GB

After doing a lot of googling, I've tried setting FETCH_COUNT on psql AND/OR setting work_mem.  I'm just not able to work around this issue, unless if I take most of the MAX() functions out but just one.

What is your work_mem set to?
Did testing show that shared_buffers set to 18GB was effective? That seems about 2 to 3 times beyond what you probably want.

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