Re: Index build temp files

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Stephen Frost <sfrost(at)snowman(dot)net>
Cc: Simon Riggs <simon(at)2ndQuadrant(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Index build temp files
Date: 2013-01-09 02:42:59
Message-ID: 8806.1357699379@sss.pgh.pa.us
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Stephen Frost <sfrost(at)snowman(dot)net> writes:
> Here's what we're seeing:

> postgresql.conf:
> temp_tablespaces = 'temp_01,temp_02'

> I have temp file logging on in postgresql.conf, so here's what we see:

> LOG: temporary file: path "base/pgsql_tmp/pgsql_tmp9221.4", size 204521472
> CONTEXT: SQL statement "create index table_key_idx on table (key) tablespace data_n04"

> We observe the files being created under $DATA/base/pgsql_tmp/, ignoring
> the temp tablespaces and not using the tablespace where the index is
> ultimately created either.

Does the user running CREATE INDEX have CREATE permission on those
tablespaces? (A quick way to double check is to try to SET
temp_tablespaces to that value explicitly.) The code will silently
ignore any temp tablespaces you don't have such permission for.

regards, tom lane

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