Hmmmm.....
> > As you can see, we're getting a nice 23mb/s peak for WAL (thanks to
> > forcedirectio) and database writes peak at 6mb/s. However, pgsql_tmp,
> > which is being used heavily, hovers around 1mb/s, and never goes above
> > 1.5mb/s. This seems to be throttling the whole system.
>
> Never mind, I'm a dork. I accidentally cut the "SET maintenance_work_mem
> = 2000000" out of my config file, and it was running with the default 1024K
Maybe I'm not an idiot (really!) even with almost 2GB of maintenance_mem, PG
still writes to pgsql_tmp no faster than 2MB/s. I think there may be an
artificial bottleneck there. Question is, PostgreSQL, OS or hardware?
Suggestions?
--
--Josh
Josh Berkus
Aglio Database Solutions
San Francisco