| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Stephen Frost <sfrost(at)snowman(dot)net> |
| Cc: | "Li, Yong" <yoli(at)ebay(dot)com>, Aleksander Alekseev <aleksander(at)timescale(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, "Bagga, Rishu" <bagrishu(at)amazon(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, "Debnath, Shawn" <sdn(at)ebay(dot)com>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, "Shyrabokau, Anton" <antons(at)ebay(dot)com> |
| Subject: | Re: Proposal to add page headers to SLRU pages |
| Date: | 2024-03-08 21:02:53 |
| Message-ID: | b33d8a2b0343ecda6f7ccb5748a19155793c87bd.camel@j-davis.com |
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| Lists: | pgsql-hackers |
On Fri, 2024-03-08 at 12:39 -0800, Jeff Davis wrote:
> Making a better secondary structure seems doable to me. Just to
> brainstorm:
We can also keep the group_lsns, and then just update both the CLOG
page LSN and the group_lsn when setting the transaction status. The
former would be used for all of the normal WAL-related stuff, and the
latter would be used by TransactionIdGetStatus() to return the more
precise LSN for that group.
Regards,
Jeff Davis
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