I am doing some sysbench tests on an EC2 instance. Below are the sysbench server configs:

• c5.18xlarge
• sysbench v1.0.11
• oltp_read_write.lua
• 32 tables
• 32 threads
• 50M rows each table
• 1PK + 1 sec index / table

The DB server is a standalone EC2 r5.12xlarge:

• ubuntu 18.04
• 280G innodb buffer pool size
• innodb log file size: 2x3G
• 10.2.22 OR 10.3.13 (changed on each run)
• performance schema on

During the sysbench initial load, MariaDB 10.2.22 performs much better than 10.3.13:

• 78 minutes on MariaDB 10.2.22
• 103 minutes on MariaDB 10.3.13

According to the screenshots attached, there is some degradation on binlog write IO.

Do you know of any degradation on MariaDB 10.3 version?

Thanks!