MySQL Bugs: #113711: Mrr implement runs much slower than before

Bug #113711	Mrr implement runs much slower than before
Submitted:	22 Jan 2024 16:35	Modified:	28 Feb 2024 14:19
Reporter:	toki ye (OCA)	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Optimizer	Severity:	S5 (Performance)
Version:	8.0.36	OS:	Linux (debian11)
Assigned to:		CPU Architecture:	x86
Tags:	Contribution, regression

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

patch use for the test

Attachment: profile_test.patch (application/octet-stream, text), 2.65 KiB.

sysbench lua script for test case. also need oltp_common.lua in directory of sysbench/src/lua to run this script

Attachment: select_mrr_test.lua (application/octet-stream, text), 4.98 KiB.

Test results - 8.0.36, 8.0.35

Attachment: 113711_8.0.36_8.0.35.results (application/octet-stream, text), 10.20 KiB.