| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Mark Priest <mark(dot)priest(at)computer(dot)org> |
| Cc: | Craig Ringer <ringerc(at)ringerc(dot)id(dot)au>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Out of Memory Error on Insert |
| Date: | 2011-10-19 03:11:57 |
| Message-ID: | 2295.1318993917@sss.pgh.pa.us |
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| Lists: | pgsql-general |
Mark Priest <mark(dot)priest(at)computer(dot)org> writes:
> However, I am still curious as to why I am getting an out of memory
> error. I can see how the performance might be terrible on such a
> query but I am surprised that postgres doesn't start using the disk at
> some point to reduce memory usage. Could it be that postgres tries
> to keep temp tables in memory?
You're running out of memory in the planner, long before execution ever
happens. (This is apparent from the memory map, but I also verified it
with a debugger yesterday.) There really isn't any alternative but to
change the form of the query or upgrade to a newer PG.
regards, tom lane
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