Re: Hang in semop() in 'waiting' backends

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To: Robert Fielding <rob@xxxxxxxx>
Subject: Re: Hang in semop() in 'waiting' backends
From: Tom Lane <tgl@xxxxxxxxxxxxx>
Date: Thu, 07 Apr 2005 00:00:04 -0400
Cc: pgsql-admin@xxxxxxxxxxxxxx
Comments: In-reply-to Robert Fielding <rob@xxxxxxxx> message dated "Thu, 07 Apr 2005 00:02:02 +0100"
In-reply-to: <9daeb170ec2df50ae120e6403845e285@xxxxxxxx>
References: <9daeb170ec2df50ae120e6403845e285@xxxxxxxx>

Robert Fielding <rob@xxxxxxxx> writes:
> strace shows:
> semop(19529737, 0xbfffe020, 1

Can you attach to a few of the stuck processes with gdb and get stack
traces?  Are they all doing exactly the same query when they hang?

			regards, tom lane

References:
- Hang in semop() in 'waiting' backends
  - From: Robert Fielding

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