On Thu, May 24, 2012 at 3:36 PM, Sergey Koposov <koposov@ast.cam.ac.uk> wrote:
> Hi,
>
>
> On Thu, 24 May 2012, Robert Haas wrote:
>>
>> Not sure. It might be some other LWLock, but it's hard to tell which
>> one from the information provided.
>
>
> If you could tell what's the best way to find out the info that you need,
> then I could run it reasonably quickly.
Add
#define LWLOCK_STATS
near the top of:
src/backend/storage/lmgr/lwlock.c
and recompile and run a reduced-size workload. When the processes
exits, they will dump a lot of data about LWLock usage to the logfile.Generally the LWLock with the most blocks on it
willbe the main
culprit.
Cheers,
Jeff