From: Holger Jakobs <holger@jakobs.com>
To: Rajesh Kumar <rajeshkumar.dba09@gmail.com>
Cc: Pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Re: Deadlock
Date: Tue, 2 Apr 2024 19:42:11 +0200
Message-ID: <0ce31eb2-4209-dc00-adf9-4d2c05ec5187@jakobs.com> (raw)
In-Reply-To: <CAJk5AtbDMDD5HKP796qoNPzKqE4qWgnr-ySE7ErED6ph6ebdtw@mail.gmail.com>
References: <CAJk5Atb6CnsgAJUQ--UPgvRH-eZUhhL__P9-pz=XZsq=r29ShA@mail.gmail.com>
<58661f82-620c-8116-efe7-23266578289c@jakobs.com>
<CAJk5AtbDMDD5HKP796qoNPzKqE4qWgnr-ySE7ErED6ph6ebdtw@mail.gmail.com>
Am 02.04.24 um 19:09 schrieb Rajesh Kumar:
> Yes, I am trying to find out what message i should reply if I receive
> email with deadlock notification.
>
> I understand how deadlock occurs, hot to find them in logs, prevention
> of deadlock(ex: oqueries in order) etc.
>
> But since the deadlock_timeout is 1s, they don't probably hang around.
> So post getting an alert, not sure what to respond to them
>
> On Tue, 2 Apr 2024, 22:15 Holger Jakobs, <holger@jakobs.com> wrote:
>
> Am 02.04.24 um 18:40 schrieb Rajesh Kumar:
>> Hi
>>
>> If I receive an alert for deadlock, what should I do? Like what
>> analysis should I do? No way to find a root cause?
>> Under pg_locks, what I can analyse?
>>
> If you receive an error with a deadlock, the current transaction
> is dead. You have to decide whether to try again.
>
> Within the error message you find a hint which other (not aborted)
> transaction was involved in the deadlock. So you have all the
> information you need to find the culprit.
>
> Regards,
>
> Holger
>
> --
>
> Holger Jakobs, Bergisch Gladbach, Tel. +49-178-9759012
>
> chat with me on Signal messenger
> <https://signal.me/#eu/GpIP259bBne_JiBYJFvbZCLYJELhB-92nJfncACL1LUeBOphfXFFgLYYVXv_AGhg;
>
I wonder what you are writing about. A database doesn't send email
notifications. That must be a feature of some application.
So you will have to deal the the application code or its developers.
Or is it a customer sending you a message that some deadlock happened on
their system? Still, you have to deal with the application code or the
log files of the database system.
Regards,
Holger
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Cc: holger@jakobs.com, rajeshkumar.dba09@gmail.com, pgsql-admin@lists.postgresql.org
Subject: Re: Deadlock
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