On 07.01.2012 00:24, Robert Haas wrote:
It's been a while since I did any testing with LWLOCK_STATS defined,
so I thought it might be about time to do that again and see how
things look. Here's how they looked back in July:
http://archives.postgresql.org/pgsql-hackers/2011-07/msg01373.php
Interesting.
A couple of weeks ago I wrote a little patch that's similar to
LWLOCK_STATS, but it prints out % of wallclock time that is spent
acquiring, releasing, or waiting for a lock. I find that more useful
than the counters.
Here's the patch, I hope it's useful to others. It uses timer_create()
and timer_settime(), so it probably won't work on all platforms, and
requires linking with -lrt.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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