On Mon, Dec 15, 2025 at 4:36 AM Soumya S Murali
<soumyamurali.work@gmail.com> wrote:
>
> With reference to the last patches (v11) I received [1] and while reviewing Melanie’s latest feedback, I understood
thatPageSetBatchChecksumInplace() is currently WIP and depends on upcoming changes to hint-bit locking. It will be
contraryto the flow if I propose new functional changes to checksum batching at this time. So for now I will focus on
preparatoryor documentation improvements until I get the updates on dependencies.
> Regarding my patch attached, the patch introduces write-combining during checkpoints by batching contiguous buffers
andallowing them to be written using vectorized I/O. My patch includes write-combining for checkpoint buffer flushes,
contiguousbuffer batching, Preserved WAL ordering, locking, and buffer state invariants. The change is currently
limitedto the checkpointer path (BufferSync()). So far I tested my implementation and found that all the regression
(233tests) and isolation tests (121 tests) got passed, the manual pgbench validation completed successfully and also
verifiedpg_stat_bgwriter counters before and after checkpoints. So far the implementation is stable in my system.
Can you explain how your implementation differs from what was posted
in v11 0006 [1]? That implements checkpointer write combining. I'm
open to ideas for improving the code, but I don't understand how your
patch is supposed to fit into the ongoing work on this thread.
- Melanie
[1] https://www.postgresql.org/message-id/CAAKRu_ZiEpE_EHww3S3-E3iznybdnX8mXSO7Wsuru7%3DP9Y%3DczQ%40mail.gmail.com
