Steve White wrote:
> This is a Samsung NC20. The goal is to use this machine for occasional
> testing of a database, but to keep its power consumption minimal.
>
> Intel powertop reports the second biggest cause of wakeups (after the
> network device ath) is postgres:
>
> Top causes for wakeups
> 23.6% ( 11.7)D postgres
>
> This is with a cleanly installed database, not being accessed at all.
Try raising autovacuum_naptime (or disabling autovac altogether). There
are other background processes that wake up with some frequency; I think
bgwriter_delay and wal_writer_delay could be increased as well.
--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support