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Percona Software for MySQL Documentation

Percona Server for MySQL 8.0.33-25 (2023-06-15)

Release date June 15, 2023
Install instructions Install Percona Server for MySQL
Upgrade instructions Percona Server for MySQL in-place upgrading guide: from 5.7 to 8.0

Percona Server for MySQL 8.0.33-25 includes all the features and bug fixes available in the MySQL 8.0.33 Community Edition in addition to enterprise-grade features developed by Percona.

Percona Server for MySQL is a freely available, fully compatible, enhanced, and open source drop-in replacement for any MySQL database. It provides superior and optimized performance, greater scalability, and availability, enhanced backups, increased visibility and instrumentation.

Percona Server for MySQL is trusted by thousands of enterprises to provide better performance and concurrency for their most demanding workloads.

Release highlights

  • This release adds the following MyRocks variables:

  • rocksdb_bulk_load_use_sst_partitioner

  • rocksdb_use_hyper_clock_cache

  • rocksdb_converter_record_cached_length

  • rocksdb_alter_table_comment_inplace

  • rocksdb_charge_memory

  • rocksdb_column_default_value_as_expression

  • rocksdb_corrupt_data_action

  • rocksdb_disable_instant_ddl

  • rocksdb_enable_delete_range_for_drop_index

  • rocksdb_partial_index_blind_delete

  • rocksdb_protection_bytes_per_key

  • rocksdb_use_write_buffer_manager

  • This release adds a new MyRocks Information Schema Table ROCKSDB_LIVE_FILES_METADATA.

  • This release removes rocksdb_instant_ddl variable. Use rocksdb_disable_instant_ddl instead.

  • This merge fixes the following issues:

  • PS-8477: The offline-mode persisted when doing dba.rebootClusterFromCompleteOutage.

  • PS-8699: ALTER INSTANCE RELOAD TLS hung with many concurrent connection attempts. We have included the upstream fix and added our fix for this issue, which significantly reduces the chances that the issue will reoccur.

Improvements and bug fixes introduced by Oracle for MySQL 8.0.33 and included in Percona Server for MySQL are the following:

  • The INSTALL COMPONENT includes the SET clause. The SET clause sets the values of component system variables when installing one or several components. This reduces the inconvenience and limitations associated with assigning variable values in other ways.

  • The mysqlbinlog --start-position accepts values up to 18446744073709551615. If the --read-from-remote-server or --read-from-remote-source option is used, the maximum is 4294967295. (Bug #77818, Bug #21498994)

  • Using a generated column with DEFAULT(col_name) to specify the default value for a named column is not allowed and throws an error message. (Bug #34463652, Bug #34369580)

  • Not all possible error states were reported during the binary log recovery process. (Bug #33658850)

  • User-defined collations are deprecated. The usage of the following user-defined collations causes a warning that is written to the log:

  • When COLLATE is followed by the name of a user-defined collation in an SQL statement.

  • When the name of a user-defined collation is used as the value of collation_server, collation_database, or collation_connection.

The support for user-defined collations will be removed in a future releases of MySQL.

Find the full list of bug fixes and changes in the MySQL 8.0.33 Release Notes.

New features

  • PS-8188: Adds the clone_exclude_plugins_list variable. By default, the list of installed plugins on the donor and recipient must match. The clone_exclude_plugins_list variable allows for specifying the list of plugin exceptions.

Bug fixes

  • PS-8647: tmp_table_size=51200 caused server exit.

  • PS-8683: Concurrent execution of FLUSH STATUS, COM_CHANGE_USER, and SELECT FROM I_S.PROCESSLIST led to deadlock. The deadlock affected connections executing the mentioned commands and other connections and made it impossible to shut down the server properly.

  • PS-8713: mysql_binlog_xxx() symbols were not exported in lybmysqlclient.so.

  • PS-8719: Audit log plugin stalled on flush.

  • PS-8747: When Federated SE internal proxy-server connection timeout occured, Got an error writing communication packets was reported back to the user while the actual operation was successful.

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Last update: 2024-04-08