MySQL Bugs: #109361: MySQL 8.0.29+ is slower than MySQL 8.0.28 with queries using JOINS

Bug #109361	MySQL 8.0.29+ is slower than MySQL 8.0.28 with queries using JOINS
Submitted:	13 Dec 2022 12:06	Modified:	11 Jan 2023 1:03
Reporter:	Satya Bodapati (OCA)	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Optimizer	Severity:	S2 (Serious)
Version:	8.0.29	OS:	Any
Assigned to:		CPU Architecture:	Any

File:	Maximum allowed size is 50MB.
Description:
Privacy:

If the data you need to attach is more than 50MB, you should create a compressed archive of the data, split it to 50MB chunks, and upload each of them as a separate attachment.

To split a large file:

On *nix platforms use the split command e.g. split -b 50MB <my_large_archive> <my_split_archive_prefix>
On windows use WinZip or a similar utility to split the large file

debug patch to trace reads and row versions

Attachment: debug_reads_v2.diff (text/x-patch), 1.41 KiB.

regression with join

Attachment: regression_with_join.test (application/octet-stream, text), 2.04 KiB.

debug patch to trace reads and row versions v3

Attachment: debug_reads_v3.diff (text/x-patch), 1.42 KiB.