> What more complex tools would you recommend to monitor memory usage?

vmstat, and sar on Linux.  Dtrace on BSD or Solaris, if you're ready to
write some d-script.  pg_top for PG memory usage interactively.

See performance-whack-a-mole: www.pgcon.org/2009/schedule/events/188.en.html

-- 
Josh Berkus
PostgreSQL Experts Inc.
www.pgexperts.com

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