| From: | Bruce Momjian <bruce(at)momjian(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Multiple full page writes in a single checkpoint? |
| Date: | 2021-02-04 03:28:35 |
| Message-ID: | 20210204032835.GA3911@momjian.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Wed, Feb 3, 2021 at 08:07:16PM -0500, Bruce Momjian wrote:
> > > I can try to add a hint-bit-page-write page counter, but that might
> > > overflow, and then we will need a way to change the LSN anyway.
> >
> > That's just a question of width...
>
> Yeah, the hint bit counter is just delaying the inevitable, plus it
> changes the page format, which I am trying to avoid. Also, I need this
> dummy record only if the page is marked clean, meaning a write
> to the file system already happened in the current checkpoint --- should
> not be to bad.
Here is a proof-of-concept patch to do this. Thanks for your help.
--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EDB https://enterprisedb.com
The usefulness of a cup is in its emptiness, Bruce Lee
| Attachment | Content-Type | Size |
|---|---|---|
| hint.diff | text/x-diff | 6.0 KB |
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Jaime Casanova | 2021-02-04 03:58:24 | typo in "Determine XID horizons" comment in procarray.c |
| Previous Message | Joel Jacobson | 2021-02-04 02:37:13 | Re: Recording foreign key relationships for the system catalogs |