Actions for heavy users of temporary tables
If you are a heavy user of temporary tables in your applications, then there are some additional actions that you may need to perform.
How to do it…
There are four main things to check, which are as follows:
- Make sure you run
VACUUMon system tables or enableautovacuumso that it will do this for you. - Monitor running queries to see how many temporary files are active and how large they are.
- Tune the memory parameters. Think about increasing the
temp_buffersparameter, but be careful not to over-allocate memory. - Separate the
temptable's I/O. In a query-intensive system, you may find that reads/writes to temporary files exceed reads/writes on permanent data tables and indexes. In this case, you should create new tablespace(s) on separate disks, and ensure that thetemp_tablespacesparameter is configured to use the additional tablespace(s).
