Re: Out of memory error with PG10.3, 10.4 but not 9.3.19

On 2018-05-15 15:02:48 +0000, ChatPristi wrote:
> I have a SELECT command (in partitionned tables) that failed with:
> psql:/tmp/query.txt:1: ERROR: out of memory
> DETAIL: Cannot enlarge string buffer containing 1073741818 bytes by 32 more
> bytes.

1073741818 is a bit less than 1GB and 1073741818+32 is a bit more. So
you are obviously hitting a 1GB limit here.

Given that 1GB is the maximum length of a character type value in
PostgreSQL and the error message mentions a "string buffer", I suspect
that your query tries to construct a very long string. Try to rewrite
the query so that it creates several shorter strings instead.

hp

--
_ | Peter J. Holzer | we build much bigger, better disasters now
|_|_) | | because we have much more sophisticated
| | | hjp(at)hjp(dot)at | management tools.
__/ | http://www.hjp.at/ | -- Ross Anderson <https://www.edge.org/>