The following bug has been logged on the website:
Bug reference: 13672
Logged by: Jamie K
Email address: jkoceniak@mediamath.com
PostgreSQL version: 9.1.14
Operating system: Debian GNU/Linux 7 (wheezy)
Description:
I set temp_buffers to a high value (8GB). My understanding was that
temporary tables stay in memory if they do not go over temp_buffers limit.
However, I noticed that any temporary tables that I create are written to
disk. (i.e. I see t181_869525834 filenames in the data directory)
Also, I don't see any query performance improvements when querying temporary
tables using a higher temp_buffers value.
What is the purpose of this setting and what performance improvements would
you expect to see by adjusting the temp_buffers value?
