Re: Adding locks statistics

From: Álvaro Herrera <alvherre(at)kurilemu(dot)de>
To: Bertrand Drouvot <bertranddrouvot(dot)pg(at)gmail(dot)com>
Cc: Michael Paquier <michael(at)paquier(dot)xyz>, Andres Freund <andres(at)anarazel(dot)de>, Jeff Davis <pgsql(at)j-davis(dot)com>, Greg Sabino Mullane <htamfids(at)gmail(dot)com>, "L(dot) pgsql-hackers" <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Adding locks statistics
Date: 2026-03-24 16:16:11
Message-ID: 202603241611.3vnou5cwxdpq@alvherre.pgsql
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Hello,

On 2026-Mar-23, Bertrand Drouvot wrote:

> So the changes done in your patches make sense to me.
>
> I have 2 comments:
>
> 1/ wait_event.c
>
> -#include "storage/lmgr.h" /* for GetLockNameFromTagType */
> -#include "storage/lwlock.h" /* for GetLWLockIdentifier */
> +#include "storage/lmgr.h"
> +#include "storage/lwlock.h"
> +#include "storage/shmem.h"
> #include "storage/spin.h"
> +#include "utils/hsearch.h"
>
> hsearch.h is already included into shmem.h so its direct include is not needed.
> That said wait_event.c needs it so including it directly might make sense just from
> a coding "style" point of view (given that it is harmless as it is protected by
> ifndef HSEARCH_H).

Hmm, right -- I don't need to add both. Done that way. I also made
some alphabetical sorts and pushed this part.

> 2/ Not directly linked to your patches
>
> It looks like that aio_funcs.c does not need lock.h (reported by include-what-you-use).
> If we remove its direct include, it's still indirectly included through proc.h
> though. But I think that removing its direct include makes sense as it's not
> needed at all.

I'm not opposed to somebody else making this change, if they want, but I
think there's little practical impact.

--
Álvaro Herrera Breisgau, Deutschland — https://www.EnterpriseDB.com/
"En las profundidades de nuestro inconsciente hay una obsesiva necesidad
de un universo lógico y coherente. Pero el universo real se halla siempre
un paso más allá de la lógica" (Irulan)

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