Re: locking issue on simple selects?

Tobias Brox <tobixen@gmail.com> writes:
> Well - I thought so, we have a logging script that logs the content of
> the pg_locks table, it didn't log anything interesting but it may be a
> problem with the script itself.  It does an inner join on
> pg_locks.relation = pg_class.oid but when I check now this join seems
> to remove most of the rows in the pg_locks table.  Does it make sense
> at all to join pg_class with pg_locks?  I will ask the sysadm to
> change to an outer join as for now.

There are lots of locks that are not tied to a specific table, so an
inner join is definitely bad.  You could use an outer join to annotate
rows that do correspond to table locks, though.

            regards, tom lane