Re: Checkpointer write combining

Melanie Plageman <melanieplageman@gmail.com>

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From: Melanie Plageman <melanieplageman@gmail.com>

To: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>

Cc: Andres Freund <andres@anarazel.de>

Date: 2025-09-08T23:44:02Z

Lists: pgsql-hackers

Attachments

v2-0002-Split-FlushBuffer-into-two-parts.patch (text/x-patch) patch v2-0002
v2-0003-Eagerly-flush-bulkwrite-strategy-ring.patch (text/x-patch) patch v2-0003
v2-0004-Write-combining-for-BAS_BULKWRITE.patch (text/x-patch) patch v2-0004
v2-0001-Refactor-goto-into-for-loop-in-GetVictimBuffer.patch (text/x-patch) patch v2-0001
v2-0005-Fix-XLogNeedsFlush-for-checkpointer.patch (text/x-patch) patch v2-0005
v2-0006-Add-database-Oid-to-CkptSortItem.patch (text/x-patch) patch v2-0006
v2-0007-Implement-checkpointer-data-write-combining.patch (text/x-patch) patch v2-0007

On Tue, Sep 2, 2025 at 5:10 PM Melanie Plageman
<melanieplageman@gmail.com> wrote:
>
> The attached patchset implements checkpointer write combining -- which
> makes immediate checkpoints at least 20% faster in my tests.
> Checkpointer achieves higher write throughput and higher write IOPs
> with the patch.

These needed a rebase. Attached v2.

- Melanie