Re: Proposal: Limitations of palloc inside checkpointer

Maxim Orlov <orlovmg@gmail.com>

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From: Maxim Orlov <orlovmg@gmail.com>

To: Andres Freund <andres@anarazel.de>

Cc: Ekaterina Sokolova <e.sokolova@postgrespro.ru>, pgsql-hackers@lists.postgresql.org

Date: 2025-02-28T16:54:12Z

Lists: pgsql-hackers

Attachments

v4-0001-Process-sync-requests-incrementally-in-AbsorbSync.patch (application/octet-stream) patch v4-0001

I think I figured it out. Here is v4.

If the number of requests is less than 1 GB, the algorithm stays the same
as before. If we need to process more, we will do it incrementally with
slices of 1 GB.

Best regards,
Maxim Orlov.

Commits

Fix checkpointer shared memory allocation
- 605890034805 17.6 landed
- 7f872ae7020e 13.22 landed
- c5d66fc12b08 14.19 landed
- 73f897ba5836 15.14 landed
- 2ac50f1187c2 16.10 landed
- 5cfbff48a4fd 18.0 landed
- 466c5435fd45 19 (unreleased) landed
Limit checkpointer requests queue size
- f32a471612c9 13.22 landed
- 50026136cc86 14.19 landed
- f0cdc2afd15e 16.10 landed
- b248a3ba4e51 15.14 landed
- 13559de95383 17.6 landed
- bae50782170c 18.0 landed
Process sync requests incrementally in AbsorbSyncRequests
- 258bf0a2ea8f 19 (unreleased) landed