Percona Server for MySQL 8.0.30-22 Update (2022-11-21)¶

Release date	November 21, 2022
Install instructions	Install Percona Server for MySQL
Download this version	Percona Server for MySQL

Percona Server for MySQL 8.0.30-22 includes all the features and bug fixes available in the MySQL 8.0.30 Community Edition in addition to enterprise-grade features developed by Percona.

Percona Server for MySQL is a free, fully compatible, enhanced, and open source drop-in replacement for any MySQL database. It provides superior performance, scalability, and instrumentation.

Percona Server for MySQL is trusted by thousands of enterprises to provide better performance and concurrency for their most demanding workloads. It delivers more value to MySQL server users with optimized performance, greater performance scalability and availability, enhanced backups, and increased visibility.

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This update to the release notes adds the Deprecation and removal section.

Release highlights¶

The following features are Generally Available (GA):

The following features, variables, or options are available only in tech preview:

SASL-based LDAP plugin
SASL-based LDAP variables
Fallback server variables for simple LDAP and SASL-based LDAP
FIDO authentication plugin
Group Replication options

Improvements and bug fixes introduced by Oracle for MySQL 8.0.30 and included in Percona Server for MySQL are the following:

Supports Generated Invisible Primary Keys(GIPK). This feature automatically adds a primary key to InnoDB tables without a primary key. The generated key is always named my_row_id. The GIPK feature is not enabled by default. Enable the feature by setting sql_generate_invisible_primary_key to ON.
The InnoDB_doublewrite system has two new settings:
DETECT_ONLY. This setting allows only metadata to be written to the doublewrite buffer. Database page content is not written to the buffer. Recovery does not use the buffer to fix incomplete page writes. Use this setting only when you need to detect incomplete page writes.
DETECT_AND_RECOVER. This setting is equivalent to the current ON setting. The doublewrite buffer is enabled. Database page content is written to the buffer and the buffer is accessed to fix incomplete page writes during recovery.
The -skip_host_cache server option is deprecated and will be removed in a future release. Use SET GLOBAL host_cache_size= 0 or set host_cache_size = 0.

Find the full list of bug fixes and changes in the MySQL 8.0.30 Release Notes.

New features¶

PS-8255: Added support to enable users to authenticate using FIDO authentication.
PS-6002: Added the global variable --replica-enable-event to maintain the create/alter event state on replicas.
PS-7980: Added the global system variables --authentication_ldap_simple_group_role_mapping and --authentication_ldap_sasl_group_role_mapping. When a user logs in with LDAP authentication, the server checks if the LDAP user is a member of any group specified in this variable. If the check is successful, the matching MySQL roles are automatically granted to the user.
PS-8275: Implements the ability to eject a cluster node when the node exceeds the flow control threshold by adding a MAJORITY mode to group_replication_flow_control_mode and a global system variable group_replication_auto_evict_timeout.

Improvements¶

PS-8385: Adds the ability to call user-defined functions to register a redo log consumer. A consumer reading the redo log blocks files from being deleted or purged.
PS-8169: Adds the ability to use Simple Authentication and Security Layer (SASL) to send secure messages within the LDAP protocol with the SASL-based LDAP authentication. The authentication_ldap_sasl plugin performs the SASL-based LDAP authentication on the server. The client must use the authentication_ldap_sasl_client plugin.
PS-8155: Implements support for multiple LDAP server for the simple LDAP authentication plugin and the SASL-based LDAP authentication plugin. If the appropriate system variable is set, and if the primary server is unavailable, the authentication plugin attempts to connect and authenticate using a fallback server. A user can also specify multiple fallback servers. The following global system variables are:
authentication_ldap_simple_fallback_server_host
authentication_ldap_simple_fallback_server_port
authentication_ldap_sasl_fallback_server_host
authentication_ldap_sasl_fallback_server_port

Bug fixes¶

PS-8204: A fix for when the audit_log_format was set to XML and the logged queries were truncated after a newline character.
PS-8246: Adapted the Encryption UDF MTR test cases to OpenSL 3.0.x. The tests failed because OpenSSL 3.0.x has a different default set of hash functions and PEM reading and writing routines generate different error messages.
PS-8351: The SHOW ENGINE INNODB STATUS would output unreadable UTF characters.
PS-8364: When using Docker, the data directory for ICU regular expressions was missing.
PS-8175: While a thread executes fil_io_set_encryption(), another thread may change the space->encryption_type. If this happens, an assertion in fil_io_set_encryption() caused an unexpected server exit.
PS-8428: A fix for an unexpected server exit when --innodb_encrypt_online_alter_logs=ON and ALTER TABLE <tablename> ADD FULLTEXT was executed.

Platform support¶

Percona Server for MySQL 8.0.30 supports Oracle Linux/Red Hat Enterprise Linux 9.
Percona Server for MySQL 8.0.30 supports Ubuntu 22.04.

Deprecation and removal¶

This release removes the Data Scrubbing feature.

The master_key and keyring_key options are removed in the innodb_redo_log_encrypt variable. The data type is changed to Boolean.

Useful links¶

The Percona Server for MySQL GitHub location

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Last update: 2023-09-27