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From: Achilleas Mantzios <[email protected]>
To: [email protected]
Subject: Re: Can a long running procedure detect when smart shutdown is pending?
Date: Fri, 5 Jul 2024 23:57:31 +0300
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAE=rie-ZcNzzt_8bKrN-7fnnbYL-ofbne4jNurd3HjjW2j9Yaw@mail.gmail.com>
References: <CAE=rie-ZcNzzt_8bKrN-7fnnbYL-ofbne4jNurd3HjjW2j9Yaw@mail.gmail.com>

Στις 5/7/24 21:12, ο/η Dennis White έγραψε:
> My project's DB has a mutli-step stored procedure using Transaction 
> Control that may take 30 minutes or more to complete.
> I am curious if there is a way to make it more smart shutdown friendly 
> so it can stop between steps?
>
> We are using both PG 14 and PG 16 on Rhel 8.
> Pardon me if it's obvious but is there a function to call or a table 
> that could be checked after a commit within the procedure to determine 
> a shutdown is pending?

Maybe somehow checking the log for a message like :

received smart shutdown request

Or use tail_n_mail against the log and then implement some logic using 
NOTIFY , ideally you want your procedure to be interrupted rather than 
do polling.

>
> Thanks,
> Dennis

-- 
Achilleas Mantzios
  IT DEV - HEAD
  IT DEPT
  Dynacom Tankers Mgmt (as agents only)


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