Re: BUG #6101: ALTER TABLE hangs with AccessExclusiveLock

On 8/07/2011 7:33 PM, Dmitry wrote:
> The following bug has been logged online:
>
> Bug reference:      6101
> Logged by:          Dmitry
> Email address:      y4gr5rzn@gmail.com
> PostgreSQL version: 9.0.4
> Operating system:   Debian i686 2.6.32-5-686-bigmem
> Description:        ALTER TABLE hangs with AccessExclusiveLock
> Details:
>
> ALTER locks the table AccessExclusiveLock and hangs.
> I can break it with Ctrl-C in psql, but it 100% reproduces in any session.

Are there any other sessions running concurrently? Is a lock on the
table you are trying to ALTER already held by another transaction
according to pg_locks ?

So far there's no evidence that this is anything except locking doing
its job.

--
Craig Ringer

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