Re: Reducing memory usage of insert into select operations?

"Francisco Reyes" <lists@stringsutils.com> writes:
> On 1:00 pm 07/18/08 Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> If you can get Postgres to report an actual out-of-memory error (as
>> opposed to crashing from OOM kill)
>> then it should dump a memory usage
>> map into the postmaster log.  Looking at that would be informative.

> Got it.

> AfterTriggerEvents: 10553909248 total in 1268 blocks; 20432 free (6
> chunks); 10553888816 used

Well, that's definitely your problem ...

>           HashBatchContext: 532676656 total in 74 blocks; 1863936 free (5
> chunks); 530812720 used

>           HashBatchContext: 415227952 total in 59 blocks; 6589744 free (5
> chunks); 408638208 used

although these numbers seem way outta line too.  What did you say you
had work_mem set to?

            regards, tom lane