| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, hubert depesz lubaczewski <depesz(at)gmail(dot)com> |
| Subject: | Re: problem with large maintenance_work_mem settings and |
| Date: | 2006-03-04 16:25:24 |
| Message-ID: | 14958.1141489524@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc> writes:
>> not that I think it is related to the problem at all. It looks like I'm
>> hitting the MaxAllocSize Limit in src/include/utils/memutils.h.
> just tried to increase this limit to 4GB (from the default 1GB) and this
> seems to help a fair bit.
s/help a fair bit/break a whole lot of stuff/
There are reasons for that limit, and you can't just arbitrarily
rejigger it.
The sorting code probably needs a defense to keep it from trying to
exceed MaxAllocSize for the SortObject array; AFAIR there is no such
consideration there now, but it's easily added. I'm not sure where your
VACUUM failure is coming from though --- can you get a back trace from
the errfinish call in that case?
regards, tom lane
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