The Ultimate Guide to High Availability with MariaDB
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Release Notes for MariaDB Enterprise Server 10.5.5-3

This third release of MariaDB Enterprise Server 10.5 is a maintenance release, including a variety of fixes.

MariaDB Enterprise Server 10.5.5-3 was released on 2020-09-08.

Note

With MariaDB Enterprise Server 10.5 "mysql" command names are replaced with "mariadb" command names. Symbolic links are in place to maintain backward compatibility with the old names and prevent disruption. (MDEV-21303)

Fixed Security Vulnerabilities

CVE (with cve.org link)CVSS base score
CVE-2021-20224.4

Notable Changes

Issues Fixed

Can result in data loss

  • InnoDB table can disappear when trying to change primary key after disabling Foreign Key checks and violating a Foreign Key constraint. (MENT-804)
  • Possible data inconsistency when executing ADD PRIMARY KEY with concurrent DML transactions. (MDEV-23244)

Can result in a hang or crash

  • Crashes when running a SQL query containing a specific subquery pattern. (MDEV-23221)
  • Server crashes upon SHOW CREATE PROCEDURE for stored procedures after upgrade from MariaDB Server 10.3. (MENT-819)
  • Crash with CREATE TEMPORARY TABLE .. ENGINE=SPIDER using wrapper odbc (MENT-807)

Can result in unexpected behavior

  • Service shutdown fails if OS datetime has been updated backwards. (MDEV-17481)
  • ALTER TABLE .. ANALYZE PARTITION can run for hours for huge tables if engine-independent persistent statistics are enabled, due to reading and locking of all rows in the InnoDB table instead of for the partition. (MDEV-21472)
  • UPDATE can fail with privilege error when UPDATE privilege exists at database level but SELECT privilege exists at table level. (MDEV-23010)
  • Latency and throughput regression identified in write-heavy benchmarks for latest releases in MariaDB Server 10.2, 10.3, and 10.4. (MENT-909)
  • Regression in Audit Plugin Performance. (MENT-700)
  • ROW_FORMAT mismatch in instant ALTER TABLE . An instant ADD or DROP column or reorder could create a dummy table object with the wrong ROW_FORMAT when innodb_default_row_format was changed between CREATE TABLE and ALTER TABLE. (MDEV-23295)
  • PAM v2 plugin produces zombie processes. (MDEV-21385)
  • Change in InnoDB I/O thread count is not reflected in system variables. (MENT-866)

Changes in Storage Engines

Interface Changes

Platforms

In alignment to the enterprise lifecycle, MariaDB Enterprise Server 10.5.5-3 is provided for:

  • CentOS 8
  • CentOS 7
  • Debian 10
  • Debian 9
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 7
  • SUSE Linux Enterprise Server 15
  • SUSE Linux Enterprise Server 12
  • Ubuntu 20.04
  • Ubuntu 18.04
  • Ubuntu 16.04
  • Microsoft Windows

Some components of MariaDB Enterprise Server might not support all platforms. For additional information, see "MariaDB Corporation Engineering Policies".

Note

MariaDB Enterprise Server 10.5 removes support for Red Hat Enterprise Linux (RHEL) 6 and CentOS 6.

Installation Instructions

Upgrade Instructions

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