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
