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Percona Server for MySQL 8.0.27-18 (2022-03-02)
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      • Release notes index
      • Percona Server for MySQL 8.0.33-25 Update (2023-08-02)
      • Percona Server for MySQL 8.0.33-25 (2023-06-15)
      • Percona Server for MySQL 8.0.32-24 (2023-03-20)
      • Percona Server for MySQL 8.0.31-23 (2023-02-09)
        • Percona Server for MySQL 8.0.30-22 Update (2022-11-21)
        • Percona Server for MySQL 8.0.30-22 (2022-11-21)
        • Percona Server for MySQL 8.0.29-21 (2022-08-08)
        • Percona Server for MySQL 8.0.28-20 (2022-06-20)
        • Percona Server for MySQL 8.0.28-19 (2022-05-12)
        • Percona Server for MySQL 8.0.27-18 (2022-03-02)
          • Release highlights
          • New features
          • Improvements
          • Bugs fixed
          • Packaging notes
          • Known issues
          • Contact us
        • Percona Server for MySQL 8.0.26-17 (2022-01-26)
        • Percona Server for MySQL 8.0.26-16 (2021-10-20)
        • Percona Server for MySQL 8.0.25-15 (2021-07-13)
        • Percona Server for MySQL 8.0.23-14 (2021-05-12)
        • Percona Server for MySQL 8.0.22-13 (2020-12-14)
        • Percona Server for MySQL 8.0.21-12 (2020-10-13)
        • Percona Server for MySQL 8.0.20-11 (2020-07-21)
        • Percona Server for MySQL 8.0.19-10 (2020-03-23)
        • Percona Server for MySQL 8.0.18-9
        • Percona Server for MySQL 8.0.17-8
        • Percona Server for MySQL 8.0.16-7
        • Percona Server for MySQL 8.0.15-6
        • Percona Server for MySQL 8.0.15-5
        • Percona Server for MySQL 8.0.14
        • Percona Server for MySQL 8.0.13-4
        • Percona Server for MySQL 8.0.13-3
        • Percona Server for MySQL 8.0.12-2rc1
      • Limiting the disk space used by binary log files
      • Extended mysqlbinlog
      • Slow query log rotation and expiration
      • Extended SELECT INTO OUTFILE/DUMPFILE
      • Support for PROXY protocol
      • SEQUENCE_TABLE(n) function
      • Trigger updates
      • Expanded fast index creation
      • Kill idle transactions
      • Percona Toolkit UDFs
      • Utility user
      • The ProcFS plugin
      • Adaptive network buffers
      • Thread pool
      • Quickstart guide for Percona Server for MySQL
      • Install Percona Server for MySQL from repositories
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        • Install Percona Server for MySQL from a source tarball
        • Compile Percona Server for MySQL 8.0 from source
        • Install using Docker
        • Docker environment variables
      • Upgrade guide
      • Upgrade using the Percona repositories
      • Upgrade from systems that use the MyRocks or TokuDB storage engine and partitioned tables
      • Upgrade using Standalone Packages
      • Downgrade
      • Binary logs and replication improvements
      • Post-installation
      • Working with AppArmor
      • Working with SELinux
      • Extended SHOW GRANTS
      • Backup and restore overview
      • Backup locks
      • Extended mysqldump
      • Start transaction with consistent snapshot
        • Using LDAP authentication plugins
        • LDAP authentication plugin system variables
      • Data masking
      • PAM authentication plugin
      • SSL improvements
      • Server variables
      • FIDO authentication plugin
      • Encryption functions
        • Data at Rest Encryption
        • Use the keyring component or keyring plugin
          • Using the Key Management Interoperability Protocol (KMIP)
          • Use the Amazon Key Management Service (AWS KMS)
          • Encrypt File-Per-Table Tablespace
          • Encrypt schema or general tablespace
          • Encrypt system tablespace
          • Encrypt temporary files
          • Encrypt Binary Log Files and Relay Log Files
          • Encrypting the Redo Log data
          • Encrypt the undo tablespace
          • Rotate the master key
          • Advanced encryption key rotation
          • Encrypt doublewrite buffers
          • Verify the encryption for tables, tablespaces, and schemas
      • Manage group replication flow control
      • Group replication system variables
      • Audit log plugin
      • Jemalloc memory allocation profiling
      • User statistics
      • Slow query log
      • Process list
      • Misc. INFORMATION_SCHEMA tables
      • Use Percona Monitoring and Management (PMM) Advisors
      • Too many connections warning
      • Handle corrupted tables
      • Thread based profiling
      • Stacktrace
      • Libcoredumper
        • The Percona XtraDB storage engine
        • Improved MEMORY storage engine
        • Improved InnoDB I/O scalability
        • Enforcing storage engine
        • Extended show engine InnoDB status
        • Show storage engines
        • Compressed columns with dictionaries
        • InnoDB full-text search improvements
        • XtraDB changed page tracking
        • XtraDB performance improvements for I/O-bound highly-concurrent workloads
        • Multiple page asynchronous I/O requests
        • Prefix index queries optimization
        • Limit the estimation of records in a Query
        • InnoDB page fragmentation counters
        • Percona MyRocks introduction
        • Percona MyRocks installation guide
        • Updated supported features
        • MyRocks limitations
        • Differences between Percona MyRocks and Facebook MyRocks
        • MyRocks Information Schema tables
        • MyRocks server variables
        • MyRocks status variables
        • Gap locks detection
        • Data loading
        • Installing and configuring Percona Server for MySQL with ZenFS support
        • TokuDB introduction
        • TokuDB installation
        • Use TokuDB
        • Fast updates with TokuDB
        • TokuDB files and file types
        • TokuDB file management
        • TokuDB background ANALYZE TABLE
        • TokuDB variables
        • TokuDB status variables
        • TokuDB fractal tree indexing
        • TokuDB troubleshooting
        • TokuDB Performance Schema integration
        • Frequently asked questions
        • Migrate and removing the TokuDB storage engine
        • Percona TokuBackup
      • List of variables introduced in Percona Server for MySQL 8.0
      • List of features available in Percona Server for MySQL releases
      • Percona Server for MySQL feature comparison
      • Understand version numbers
      • Development of Percona Server for MySQL
      • Trademark policy
      • Index of INFORMATION_SCHEMA tables
      • Frequently asked questions
      • Copyright and licensing information
      • Glossary

    • Release highlights
    • New features
    • Improvements
    • Bugs fixed
    • Packaging notes
    • Known issues
    • Contact us

    Percona Server for MySQL 8.0.27-18 (2022-03-02)¶

    • Installation Installing Percona Server for MySQL

    Percona Server for MySQL 8.0.27-18 includes all the features and bug fixes available in the MySQL 8.0.27 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, and delivers greater value to MySQL server users with optimized performance, greater performance scalability and availability, enhanced backups and increased visibility. Commercial support contracts are available.

    Release highlights¶

    The following lists a number of the bug fixes for MySQL 8.0.27, provided by Oracle, and included in Percona Server for MySQL:

    • The default_authentication_plugin is deprecated. Support for this plugin may be removed in future versions. Use the authentication_policy variable.

    • The binary operator is deprecated. Support for this operator may be removed in future versions. Use CAST(... AS BINARY).

    • Fix for when a parent table initiates a cascading SET NULL operation on the child table, the virtual column can be set to NULL instead of the value derived from the parent table.

    Find the full list of bug fixes and changes in the MySQL 8.0.27 Release Notes.

    New features¶

    • PS-7960: Documented the rocksdb_partial_index_sort_max_mem variable, the rocksdb_bulk_load_partial_index variable, and the rocksdb_cancel_manual_compactions variable.

    • PS-2346: LP #720547: Implemented an option to allow queries with specific error codes to add entries to the Slow Query Log.

    Improvements¶

    • PS-7955: Enabled ZenFS functionality on standard Percona Server packages on Debian 11 and Ubuntu 20.04.

    • PS-7931: Implemented a Slow Query Log Rotation and Expiration in Percona Server for MySQL 8.0.

    • PS-6730: The ‘Last_errno:’ field in the Slow Query Log contains only error information.

    • PS-8076: Added a deprecation warning when using XtraDB changed page tracking.

    Bugs fixed¶

    • PS-7883: An ALTER query caused a server exit when --rocksdb_write_disable_wal was enabled.

    • PS-8007: Percona Server for MySQL can fail to start if the server starts before the network mounts the datadir or a local mount of the datadir.

    • PS-7977: The AppArmor profile is broken after an 8.0.22-13 to 8.0.23-14 upgrade. (Thanks to Alex Kompel for reporting this issue)

    • PS-7958: A SELECT statement using a Full-Text Search index with a special character caused a server exit.

    • PS-7940: The initialization of a virtual column template if a child table had a virtual column caused a restart loop. This initialization prevented a server exit when there was an ON DELETE CASCADE statement in the parent table and the child table had virtual columns. (Upstream #105290)

    • PS-5654: On a view, the query digest for each SELECT statement is now based on the SELECT statement and not the view definition, which was the case for earlier versions (Upstream #89559)

    • PS-7975: Fix to allow test main.mtr_unit_tests to complete successfully (Thanks to Thomas Deutschmann for reporting this issue)

    • PS-7873: Fix for when the log_status table reported an incorrect executed_gtid (Thanks to zhujzhuo for reporting this issue) (Upstream #102175)

    • PS-5168 Fix for when the Slow Query Log reports tmp_table_size:0.

    • Normalized the zenfs utility backup and restore requirements for the --path command line option, the --backup_path command-lne option, and the restore_path command-line option. For more information, see Installing and configuring Percona Server for MySQL with ZenFS support.

    Packaging notes¶

    • Red Hat Enterprise Linux 6 (and derivative Linux distributions) are no longer supported.

    Known issues¶

    The RPM packages for Red Hat Enterprise Linux 7 (and compatible derivatives) do not support TLSv1.3, as it requires OpenSSL 1.1.1, which is currently not available on this platform.

    Contact us¶

    The Documentation Contribution Guide describes the methods available to contribute to the Percona Server for MySQL documentation.

    For free technical help, visit the Percona Community Forum.

    To report bugs or submit feature requests, open a JIRA ticket.

    For paid support and managed services or consulting services, contact Percona Sales.

    Contact us

    For free technical help, visit the Percona Community Forum.

    To report bugs or submit feature requests, open a JIRA ticket.

    For paid support and managed or consulting services , contact Percona Sales.


    Last update: 2023-01-12
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