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help / color / mirror / Atom feedFrom: Tom Lane <[email protected]>
To: Adrian Klaver <[email protected]>
Cc: [email protected] <[email protected]>
Cc: [email protected]
Subject: Re: What happens if the socket lock file is deleted?
Date: Thu, 29 Jan 2026 16:24:39 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
<[email protected]>
Adrian Klaver <[email protected]> writes:
> From here at ~line 1781:
> https://github.com/postgres/postgres/blob/master/src/backend/postmaster/postmaster.c
> /*
> * Once a minute, verify that postmaster.pid hasn't been removed or
> * overwritten. If it has, we force a shutdown.
Actually, Steve was asking about socket lock files, so the relevant
code fragment is the bit just below that:
/*
* Touch Unix socket and lock files every 58 minutes, to ensure that
* they are not removed by overzealous /tmp-cleaning tasks. We assume
* no one runs cleaners with cutoff times of less than an hour ...
*/
if (now - last_touch_time >= 58 * SECS_PER_MINUTE)
{
TouchSocketFiles();
TouchSocketLockFiles();
last_touch_time = now;
}
regards, tom lane
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