Re: lock help

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On Thu, Mar 20, 2008 at 10:42:29AM -0400, Tom Lane wrote:
> Ray Stell <stellr@xxxxxxxxxx> writes:
> Define "wedged" --- what's the actual problem?

client queries not returning.


> If it is a locking issue then the pg_locks view might be useful.

duh, I meant to cut and paste the lock info and sent user info 
by being in a panic.

ghiza=# select * from pg_locks;
   locktype    | database | relation | page | tuple | transactionid | classid | objid | objsubid | transaction |  pid  |      mode       | granted 
---------------+----------+----------+------+-------+---------------+---------+-------+----------+-------------+-------+-----------------+---------
 relation      |    16384 |    10328 |      |       |               |         |       |          |    15470960 | 30765 | AccessShareLock | t
 transactionid |          |          |      |       |      15470960 |         |       |          |    15470960 | 30765 | ExclusiveLock   | t
(2 rows)

As it turns out this app is distributed across 3 or 4 dbs and it was an oracle
instance that was hung.  However, I was ill prepared to eval the state of
the pg db.  Is there a good place to focus in the docs on how to evaluate
locking issues.

Thanks.

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