MySQL Bugs: #104546: MySQL 8.0.26 single thread replication performance is slower than MySQL 5.7.35.

Bug #104546	MySQL 8.0.26 single thread replication performance is slower than MySQL 5.7.35.
Submitted:	5 Aug 2021 9:50	Modified:	30 Jan 2024 15:57
Reporter:	Takanori Sejima	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Server: Row Based Replication ( RBR )	Severity:	S5 (Performance)
Version:	8.0.26	OS:	Ubuntu (18.04.5 LTS)
Assigned to:		CPU Architecture:	x86 (Skylake-SP)
Tags:	innodb, replication

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

compared 5.7.35 and 8.0.26 by sysbench without replication and performance_schema.

Attachment: mysql-data-104546.zip (application/x-zip-compressed, text), 279.69 KiB.

I executed sysbench oltp_update_non_index on MySQL 8.0.26 on Ubuntu 20.04.2 LTS.

Attachment: mysql-data-104546-focal.zip (application/x-zip-compressed, text), 116.43 KiB.

I compared the performance when binlog was enabled or disabled.

Attachment: mysql-data-104546_skip_log_bin.zip (application/x-zip-compressed, text), 406.13 KiB.

recorded 5_4_retbleed_off_8_0_*_lbr.svg

Attachment: mysql_flamegraph_svg.tar.gz (application/x-gzip, text), 1.20 MiB.