| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Jan Wieck <jan(at)wi3ck(dot)info> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Aleksander Alekseev <aleksander(at)timescale(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, shveta malik <shveta(dot)malik(at)gmail(dot)com>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, tomas(at)vondra(dot)me |
| Subject: | Re: Commit Timestamp and LSN Inversion issue |
| Date: | 2024-11-07 21:38:09 |
| Message-ID: | bn4md3aoj25vvcavsoan4gqeqhgm37raqvxanxjagomn67khpn@752bxw7nil2x |
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| Lists: | pgsql-hackers |
Hi,
On 2024-11-07 15:05:31 -0500, Jan Wieck wrote:
> On 11/7/24 13:19, Andres Freund wrote:
> > I think it's *completely* unacceptable to call a hook inside
> > ReserveXLogInsertLocation, with the spinlock held, no less. That's the most
> > contended section of code in postgres.
>
> Aside from your technical concerns, can we at least agree that the commit-ts
> vs LSN inversion is a problem that should get addressed?
I'm not against addressing it, but I'd consider it not a high priority and
that the acceptable cost (both runtime and maintenance) of it should would
need to be extremely low.
Greetings,
Andres Freund
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