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WAL and TMP directory locations

From: Robert Schnabel <schnabelr(at)missouri(dot)edu>
To: pgsql-novice(at)postgresql(dot)org
Subject: WAL and TMP directory locations
Date: 2009-04-02 16:13:59
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-novice
I suspect that I already know the answer to my question but I'm looking 
for confirmation from experts.  I have moved my pg_xlog and pgsql_tmp 
directories to a separate disk array to distribute IO. Some details... 
Windows XP64, pg 8.3.7, all disk arrays are direct attach to my raid 
card (SAS).

I have one rather large table (~1.5 B rows) that I do sorting and 
grouping on in order to calculate some values that I need and then 
insert those values into another table.   This produces a lot of tmp 
files (over 80 the last time I ran the query) which is why I moved the 
tmp directory.

Question... is this appropriate and is there anything else I could 
change to help speed things up.


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