Scott,
> I'm guessing OLTP needs things like FSM cranked up,
> OLAP (a for analytical) needs more shared buffers and sort memory
> Webserver might be better served just slightly higher values than default
> but well under those of either OLTP or OLAP...
Yes. Take sort_mem for example:
OLTP_SM 1024
OLTP_LM 2048
OLAP_SM 4096
OLAP_LM 16384
WWW_SM 512
WWW_LM 1024
Workstation 1024
The basic idea is:
More RAM => more sort_mem
More concurrent queries => less sort_mem
Larger data sets => more sort_mem
Lots of grouped aggregates => more sort_mem
--
-Josh Berkus
Aglio Database Solutions
San Francisco
