Hi, andrei.elkin! On Jun 19, andrei.elkin@pp.inet.fi wrote:

revision-id: 37b432c1d59e66b742f97a280cae7784d85e62ec (mariadb-10.0.35-41-g37b432c1d59) parent(s): d2e1ed8b936a78ceeec0e64231997d7ed18a4daf author: Andrei Elkin committer: Andrei Elkin timestamp: 2018-06-19 18:14:47 +0300 message:

MDEV-15242 Poor RBR update performance with partitioned tables

Observed and described partitioned engine execution time difference between master and slave was caused by excessive invocation of base_engine::rnd_init which was done also for partitions uninvolved into Rows-event operation. The bug's slave slowdown therefore scales with the number of partitions.

Ok to push

Fixed with applying an upstream patch.

References: ---------- https://bugs.mysql.com/bug.php?id=73648 Bug#25687813 REPLICATION REGRESSION WITH RBR AND PARTITIONED TABLES

Regards, Sergei Chief Architect MariaDB and security@mariadb.org