From: | Michael Paquier <michael(at)paquier(dot)xyz> |
---|---|
To: | torikoshia <torikoshia(at)oss(dot)nttdata(dot)com> |
Cc: | Andres Freund <andres(at)anarazel(dot)de>, bharath(dot)rupireddyforpostgres(at)gmail(dot)com, boekewurm+postgres(at)gmail(dot)com, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Add new option 'all' to pg_stat_reset_shared() |
Date: | 2023-11-12 07:54:38 |
Message-ID: | ZVCEvjc_uGo6tEA9@paquier.xyz |
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On Fri, Nov 10, 2023 at 08:32:34PM +0900, torikoshia wrote:
> On 2023-11-10 13:18, Andres Freund wrote:
>> I see no reason to not include slrus. We should never have added the
>> ability to reset them individually, particularly not without a use
>> case - I couldn't find one skimming some discussion. And what's the
>> point in not allowing to reset them via pg_stat_reset_shared()?
>
> When including SLRUs, do you think it's better to add 'slrus' argument which
> enables pg_stat_reset_shared() to reset all SLRUs?
I understand that Andres says that he'd be OK with a addition of a
'slru' option in pg_stat_reset_shared(), as well as including SLRUs in
the resets if everything should be wiped.
28cac71bd368 is around since 13~, so changing pg_stat_reset_slru() or
removing it could impact existing applications, so there's little
benefit in changing it at this stage. Let it be itself.
> As described above, since SLRUs cannot be reset by pg_stat_reset_shared(), I
> feel a bit uncomfortable to delete it all together.
That would be only effective if NULL is given to the function to reset
everything, which is OK IMO, because this is a shared stats.
--
Michael
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