Re: Incorrect cost for MergeAppend

Alexander Kuzmenkov <akuzmenkov@timescale.com>

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From: Alexander Kuzmenkov <akuzmenkov@timescale.com>

To: David Rowley <dgrowleyml@gmail.com>

Cc: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>, pgsql-hackers@postgresql.org

Date: 2024-01-30T13:23:37Z

Lists: pgsql-hackers

Attachments

merge-append-cost-v2.patch (text/x-patch) patch v2

On Tue, Jan 30, 2024 at 1:20 PM David Rowley <dgrowleyml@gmail.com> wrote:
> You should likely focus on trying to find a test that does not require
> making 2 tables with 10k rows.

Is 1k smallint OK? It should fit in one page. Still reproduces the
error, and the entire test case runs in under 10 ms.

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Fix costing bug in MergeAppend
- 9d1a5354f58c 17.0 landed
Fix locking when fixing an incomplete split of a GIN internal page
- 6a1ea02c491d 17.0 cited