Re: Update blocking a select count(*)?

Peter Geoghegan  wrote:
> Benedict Holland  wrote:
>> Do I seem to have this right and is there anything I can do?
> 
> There are a couple of maintenance operations that could block a
> select. Do you see any AccessExclusive locks within pg_locks?
> That's the only type of lock that will block a select statement's
> AccessShare lock.
 
To check for that, see the queries on these Wiki pages:
 
http://wiki.postgresql.org/wiki/Lock_Monitoring
http://wiki.postgresql.org/wiki/Lock_dependency_information
 
-Kevin