Hari Bhaskaran <[EMAIL PROTECTED]> writes:
> Why does pg_autovacuum need locks on more than one table at a time?
It doesn't --- unless maybe you are considering system catalogs, in
which case I'd wonder why you need exclusive lock on a catalog.
If you can prove the contrary, let's see a test case.
regards, tom lane
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TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match
