Documentation Index

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Cloud DB for MySQL release notes

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Available in Classic and VPC

Keep track of changes to the Cloud DB for MySQL user guide. The release notes include:

  • New
    • Initial release
  • Update
    • Added: New features
    • Changed: Feature enhancements
    • Fixed: Bug fixes
    • Deprecated: Feature deprecations or service shutdown
    • Miscellaneous: Documentation changes

Read on for detailed descriptions of each release.

VPC

The following table describes updates to the VPC environment:

June 25, 2026

Type Change Go to page
Update - Added
  • Added MySQL 8.4.8.
  • Provided the latest kernel version (G2 and G3 generations).
    • OS: Rocky 8.10, Navix 8.10.
    • Kernel version: 4.18.0-553.124.1.el8_10.
  • Added the DB metrics.
    • Undo size (size of the undo file in use).
  • Provided the Manual Backup feature.
    • Enabled snapshot-based backups at any time. (Supported only for G3-generation HA DB services.)
Update - Changed Enabled caching_sha2_password for the ha_admin account used for HA Monitor ↔ Agent communication. DB Server
Update - Fixed Fixed REVOKE error (1141) for CRUD/READ users when using ACL MODIFY. DB Server

April 23, 2026

Type Change Go to page
Update - Added
  • Released config template feature.
  • Added MySQL 8.0.45.
  • Added DB Server setting feature.
    • Added jemalloc to malloc-lib settings.
    • Added Semi-sync (MySQL 8.4 or higher).
  • Added User DB Config.
    • innodb_max_undo_log_size
    • sql_safe_updates
    • rpl_semi_sync_source_timeout
Update - Changed
  • Changed minimum digits for DB User ID.
    • Min. 4 digits → 3 digits.
  • Improved config template event_history view.

January 22, 2026

Type Change Go to page
Update - Added
  • Released MySQL 8.4 major version (MySQL 8.4.6).
  • Released MySQL 8.0 → 8.4 major version upgrade feature.
  • [DB Dashboard] Added new charts.
    • Connection Percent (%).
    • Failover Status.
Update - Changed
  • Improved the speed of the Slow Log analysis view.
  • Restricted point-in-time recovery for Cloud DB for MySQL to times prior to completion or abnormal termination when deleting [Database Migration Service] tasks.

November 20, 2025

Type Change Go to page
Update - Added
  • Added User DB Config.
    • binlog_transaction_dependency_tracking
    • performance_schema_digests_size
    • Added optimizer_switch option items: skip_scan = off
 DB Server
Update - Changed
  • Changed the User DB config default value.
    • Changed the default value of slave_parallel_type from DATABASE to LOGICAL_CLOCK.
    • Changed the default value of max_prepared_stmt_count from 1048576 to 16382.
  • Changed/added service limits for user DB config.
    • Changed the replica_preserve_commit_order configuration policy.
      • Can only be set to replica_preserve_commit_order = ON when replica_parallel_type = LOGICAL_CLOCK.
    • When autocommit = OFF, slave_parallel_workers(replica_parallel_workers) can be configured to 0 only.
  • Added support for using DB names in reserved word format within sys.ncp_create_db() procedures.
 DB Server

September 18, 2025

Type Change Go to page
Update - Added
  • Added rolling specification change feature (G3).
  • Enabled automatic registration of time zone data when creating a new cluster.
 DB Server
Update - Miscellaneous Added an integration guide for external monitoring tools. External monitoring tool integration

July 17, 2025

Type Change Go to page
Update - Added Released G3 generation (KR, JP). DB Server
Update - Changed
  • Restricted certain Target DB features on the day Database Migration Service is used.
    • Added Slave.
    • OS upgrade.
    • Point-in-time recovery.
    • Changed Multi Zone configuration.
 DB Server

June 19, 2025

Type Change Go to page
Update - Added
  • Added support for entering DB User IPs in CIDR format.
  • Added MySQL 8.0.42.
  • When a replication error or delay occurs, the Standby Master status changes to Unknown, and failover is unavailable.
 DB Server

May 8, 2025

Type Change Go to page
Update - Added
  • Added User DB Config.
    • innodb_adaptive_flushing_lwm
    • innodb_flush_log_at_timeout
    • innodb_flush_method
    • innodb_io_capacity_max
    • innodb_lru_scan_depth
    • innodb_max_dirty_pages_pct_lwm
    • sync_binlog
    • table_definition_cache
    • innodb_doublewrite_pages
    • temptable_max_mmap
    • temptable_max_ram
 DB Server
Update - Changed
  • Changed the input range for user DB config.
    • innodb_log_file_size
 DB Server

April 17, 2025

Type Change Go to page
Update - Added
  • Added support for creating a new DB server using backups stored in Object Storage.
  • Added support for creating a new service through point-in-time recovery and changing specifications during creation.
  • Added User DB Config.
    • Added sql_require_primary_key.
    • Changed the default value of sql_require_primary_key from OFF to ON for versions 8.0.40 and later.

March 20, 2025

Type Change Go to page
Update - Added
  • Provided operating system management features.
  • Provided an option to select server specifications when creating a new service from a backup file.
  • Added User DB Config.
    • explicit_defaults_for_timestamp
    • thread_stack
    • table_open_cache_instances
    • innodb_max_dirty_pages_pct
    • innodb_doublewrite
    • innodb_page_cleaners
    • innodb_purge_threads
Update - Changed
  • Query Timeline page processing.
  • disabled_storage_engine ="MEMORY"
 Monitoring

January 16, 2025

Type Change Go to page
Update - Added Added MySQL 8.0.40. -
Update - Changed
  • Reduced the default value of innodb_buffer_pool_size for new servers.
  • Applied tcmalloc as the default allocator when creating new clusters.
 -

November 21, 2024

Type Change Go to page
Update - Deprecated Blocked new service creation for MySQL 5.7. -

October 17, 2024

Type Change Go to page
Update - Added
  • Replaced Base OS (Rocky 8.10).
  • Improved DB Config management.
  • Improved backup retention period settings.
  • Integrated DB user change history with CAT.
 DB Server
Update - Deprecated Disabled data storage encryption feature. -

July 23, 2024

Type Change Go to page
Update - Added
  • Added User DB Config.
    • log_output
    • bulk_insert_buffer_size
 DB Server
Update - Miscellaneous Provided troubleshooting guide. Cloud DB for MySQL troubleshooting

June 20, 2024

Type Change Go to page
Update - Added
  • Enabled expanding the Standby Master details interface.
  • Permission can be selected for system tables when managing DB users.
  • Added MySQL 8.0.36.
  • Added a Slow Log analysis feature.
  • Added a feature to view query execution history for a specific session.
  • Added a return protection setting.
  • Added User DB Config.
    • innodb_open_files
    • innodb_thread_concurrency
    • innodb_io_capacity
    • optimizer_switch
  • Added a value for collation_connection.
    • utf8mb4_unicode_ci
    • euckr_korean_ci
    • utf8_general_ci
  • Added User Stored Procedures.
    • ncp_grant_role()
    • ncp_revoke_role()
 DB Server
Update - Changed
  • Added the monitoring graph.
  • Added the InnoDB Buffer Pool graph.
 Monitoring
Update - Miscellaneous Reorganized user guide composition and content. Cloud DB for MySQL overview

April 25, 2024

Type Change Go to page
Update - Added
  • Added User DB Config.
    • log_error_suppression_list
 DB Server

March 21, 2024

Type Change Go to page
Update - Added
  • Added User DB Config.
    • password_reuse_interval
    • password_history
 DB Server

January 25, 2024

Type Change Go to page
Update - Added
  • Added MySQL 8.0.34.
  • Added User DB Config.
    • default_collation_for_utf8mb4
    • collation_connection
    • innodb_stats_auto_recalc
    • innodb_stats_include_delete_marked
 DB Server

November 23, 2023

Type Change Go to page
Update - Added
  • Added major version upgrade feature.
  • Added DB Server setting feature.
    • Added Malloc-lib change feature.
  • Added User DB Config.
    • innodb_buffer_pool_instances
    • innodb_buffer_pool_chunk_size
    • max_heap_table_size
 DB Server

May 25, 2023

Type Change Go to page
Update - Added
  • Added MySQL 8.0.32.
  • Added User DB Config.
    • internal_tmp_mem_storage_engine
 DB Server

April 20, 2023

Type Change Go to page
Update - Added
  • Created a new DB service when restoring from a backup file.
  • Added User DB Config.
    • innodb_buffer_pool_dump_at_shutdown
    • innodb_buffer_pool_load_at_startup
    • innodb_buffer_pool_dump_pct
    • innodb_log_file_size
    • innodb_log_files_in_group
    • innodb_log_buffer_size
    • innodb_print_all_deadlocks
    • innodb_online_alter_log_max_size

February 23, 2023

Type Change Go to page
Update - Added
  • Added MySQL 5.7.40.
  • Provided password plugin.
    • Added password policy configuration feature for DB accounts.
  • Provided Audit plugin.
    • Added features to store and view DB access history.
 DB Server
Update - Changed
  • Added the monitoring graph.
    • Added the Replication Status graph (Replication Stop status monitoring).
 Monitoring

November 22, 2022

Type Change Go to page
Update - Added
  • Added a feature to send a user notification when Standby Master reconstruction is complete.
  • Added User DB Config.
    • performance_schema_max_sql_text_length
    • performance_schema_consumer_events_waits_current
    • performance_schema_consumer_events_statements_history_long
  • Added Event History records for user stored procedure calls.
    • ncp_create_db()
    • ncp_kill_query()
    • ncp_kill_session()
 DB Server

July 21, 2022

Type Change Go to page
Update - Added
  • Kill process feature through stored procedure.
    • kill query
    • kill session
 DB Server
Update - Changed
  • Added monitoring graph collection and display metrics.
    • innodb_buffer_pool_total
    • innodb_buffer_pool_used
    • innodb_buffer_pool_modified
 Monitoring

December 21, 2021

Type Change Go to page
Update - Added
  • Added multi zone specifications.
  • Added DB Config.
    • innodb_ft_result_cache_limit
    • slave_parallel_type
    • slave_parallel_workers
 DB Server
Update - Miscellaneous Reorganized user guide composition and content. Cloud DB for MySQL overview

Classic

The following table describes updates to the Classic environment:

October 17, 2024

Type Change Go to page
Update - Deprecated Deprecated the Germany Region service. -

July 23, 2024

Type Change Go to page
Update - Miscellaneous Provided troubleshooting guide. Cloud DB for MySQL troubleshooting

June 20, 2024

Type Change Go to page
Update - Miscellaneous
  • Reorganized user guide composition and content.
  • Separated menus by VPC and Classic platform environments.
 Cloud DB for MySQL overview

March 21, 2024

Type Change Go to page
Update - Added Added FLUSH_TABLES permission to user accounts available from MySQL version 8.0.23. -

December 15, 2022

Type Change Go to page
Update - Added
  • Added a feature to send a user notification when Standby Master reconstruction is complete.
  • Added User DB Config.
    • performance_schema_max_sql_text_length
    • performance_schema_consumer_events_waits_current
    • performance_schema_consumer_events_statements_history_long
  • Added Event History records for user stored procedure calls.
    • ncp_create_db()
    • ncp_kill_query()
    • ncp_kill_session()

August 18, 2022

Type Change Go to page
Update - Added
  • Kill process feature through stored procedure.
    • kill query
    • kill session
 -

May 26, 2022

Type Change Go to page
Update - Added
  • Added a feature for changing DB server name.
  • Added MySQL 5.7.37.
  • Added Standby Master reinstallation and Replication Skip features.
  • Added User DB Config.
    • collation_server
    • connect_timeout
    • (For Stand Alone) expire_logs_days / binlog_expire_logs_seconds
    • (For Stand Alone) log-bin
 DB Server
Update - Changed
  • Improved query timeline Excel download feature (Download CSV).
  • Applied DB error message codes and added multilingual support.
  • Improved the monitoring graph.
    • Changed the interval settings for each view period.
    • Added MIN and MAX aggregation metrics.
    • Added the monitoring graph (added DB Dashboard - Connection Aborted).
 Monitoring

February 17, 2022

Type Change Go to page
Update - Added Provided Object Storage upload APIs. DB Server

December 21, 2021

Type Change Go to page
Update - Added
  • Added DB Config.
    • innodb_ft_result_cache_limit
    • slave_parallel_type
    • slave_parallel_workers
 DB Server
Update - Miscellaneous Reorganized user guide composition and content. Cloud DB for MySQL overview
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