Re: Adding locks statistics

From: Michael Paquier <michael(at)paquier(dot)xyz>
To: Bertrand Drouvot <bertranddrouvot(dot)pg(at)gmail(dot)com>
Cc: Andres Freund <andres(at)anarazel(dot)de>, Jeff Davis <pgsql(at)j-davis(dot)com>, Greg Sabino Mullane <htamfids(at)gmail(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: Adding locks statistics
Date: 2026-03-21 05:55:33
Message-ID: ab4y1UQUsSS7bSVd@paquier.xyz
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On Thu, Mar 19, 2026 at 12:25:41PM +0000, Bertrand Drouvot wrote:
> That's a good idea! I only moved LockTagType, LOCKTAG_LAST_TYPE, LockTagTypeNames
> and LOCKTAG into a new locktag.h. I chose not to move the SET_LOCKTAG_* macros
> because then we'd also need to move DEFAULT_LOCKMETHOD and USER_LOCKMETHOD that
> I think are better suited in lock.h.

While looking at the full set of declarations, I've come to disagree
to that: by moving the macros, we also do not need to know about the
internal field names of LOCKTAG across multiple headers.

> I did not check if there are any other files that could benefit of using
> locktag.h instead of lock.h but that's something I'll do and open a dedicated
> if any (once locktag.h is in the tree).

I have checked after that, and did not spot an area (except your patch
of course). And applied this part.

> Not sure as we already have multixact-stats.

Ah, right. I did not notice this one. This existing name sounds OK
by me, then.
--
Michael

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