Bug #104546 MySQL 8.0.26 single thread replication performance is slower than MySQL 5.7.35.
Submitted: 5 Aug 9:50 Modified: 27 Aug 7:25
Reporter: Takanori Sejima Email Updates:
Status: Verified Impact on me:
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 3MB.

If the data you need to attach is more than 3MB, you should create a compressed archive of the data and a README file that describes the data with a filename that includes the bug number (recommended filename: mysql-bug-data-104546.zip) and upload one to sftp.oracle.com. A free Oracle Web (SSO) account (the one you use to login bugs.mysql.com) and a client that supports SFTP are required in order to access the SFTP server.

To upload the file to sftp.oracle.com:

  1. Open an SFTP client and connect to sftp.oracle.com. Specify port 2021 and remote directory /support/incoming/.
  2. Log in with your newly created Oracle Web account (email address) and password.
  3. Upload the archive to /support/incoming.
  4. Once you have uploaded the file, add a comment to this bug to notify us about it.
Example: sftp -oPort=2021 -oUser=email sftp.oracle.com:/support/incoming

Usage Notes: This directory is unlistable, which means that once you have uploaded your file, you will not be able to see it. A file cannot be uploaded more than once with the same filename. The filename must be changed before attempting to upload the file again. The filename should always start with mysql-bug- prefix. Files are retained on the SFTP server for 7 days and then permanently removed.

[10 Aug 13:31] Takanori Sejima
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.

[17 Aug 11:37] Takanori Sejima
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.

[27 Aug 7:20] Takanori Sejima
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.