Re: PostgreSQL 9.2.3 performance problem caused Exclusive locks

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Emre,

> > LOG:  process 4793 acquired ExclusiveLock on extension of relation
> > 305605 of database 16396 after 2348.675 ms

The reason you're seeing that message is that you have log_lock_waits turned on.

That message says that some process waited for 2.3 seconds to get a lock for expanding the size of relation 16396/305605, which is most likely an index. This is most likely due to changes in your application, or an increase in concurrent write activity.

--Josh



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