First thought is make sure you are looking in the right database.

pg_locks shows data over the entire server, not just the connected database.
pg_class exists for each database  so if you are connected to 'my_database' but 
the object is in 'your_database', it won't show up in pg_class on 'my_database'.

check the database value in pg_locks to verify where you should be looking for 
the object.

reiner

On 5 okt 2013, at 00:48, Amador Alvarez <aprad...@gmail.com> wrote:

> Hi there,
> 
> I am using a postgres 9.2 slave for some reports and I noticed that sometimes 
> they are held up because certain activity on the master like vacuums can 
> affect long queries on a slave .
> 
> Looking at pg_locks view , I can see that the recovering process on the slave 
> is holding some AccessExclusiveLock locks on relations which numbers that do 
> not mach any pg_class.oid. 
> 
> Any idea How could I find out which relations are locked by the recovering 
> process?
> 
> 
> Thanks in advance,
> A.A.



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