Обсуждение: How to track down locks held by recovery process on a slave?
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 .Any idea How could I find out which relations are locked by the recovering process?
Thanks in advance,
A.A.
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'tshow 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 <apradopg@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 activityon 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 lockson 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.