On Mon, Mar 21, 2016 at 04:26:40PM +0100, Nicolas Aubert wrote:
> the vacuum process is the 22510
> here is what I found in pg_locks
>
>
> virtualtransaction | pid | mode | granted | fastpath
>
------------+---------------+---------+-------+----------+--------------------+-------+--------------------------+---------+----------
>
> 3/376480 | 22510 | ExclusiveLock | t |
> | | | | |
> 3/376480 | 22510 | ShareUpdateExclusiveLock | f | f
>
I'm sure there are more columns in pg_locks.
What you need to find is the rows with pid of vacuum, that have granted
= 'false', and see what the lock is on (the columns you ignored).
Then you check what has conflicting locks on the required things.
Best regards,
depesz