Re: Random Deadlock on DROP CONSTRAINT - Mailing list pgsql-general

From Scott Marlowe
Subject Re: Random Deadlock on DROP CONSTRAINT
Date
Msg-id dcc563d10903081429p6119556cif6b06411eea6db6b@mail.gmail.com
Whole thread Raw
In response to Re: Random Deadlock on DROP CONSTRAINT  (Mark Mandel <mark.mandel@gmail.com>)
Responses Re: Random Deadlock on DROP CONSTRAINT  (Mark Mandel <mark.mandel@gmail.com>)
List pgsql-general
On Sun, Mar 8, 2009 at 2:54 PM, Mark Mandel <mark.mandel@gmail.com> wrote:
> Just a note on this -
>
> I have tried it on both 8.2 and 8.3
>
> Maybe 'deadlock' isn't the right word, so much as 'hang'.. in that
> once it decided to stop at that point, it goes no further, unless I
> restart the app server that has the connecton to the database.
>
> It seems to be completely random, and I'm got no idea what is going on.

Well, pg_locks can tell you, and us, a lot.  Next time it's happening
grab the contents of pg_locks and attach it to an email here.  Most
likely it's some long running transaction or something blocking the
access you need.

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