Skip to content
Percona Software for MySQL Documentation

For help, click the link below to get free database assistance or contact our experts for personalized support.

Get help from Percona

Percona Server for MySQL 8.0.20-11 (2020-07-21)

Percona Server for MySQL 8.0.20-11 includes all the features and bug fixes available in MySQL 8.0.20 Community Edition in addition to enterprise-grade features developed by Percona.

As of 8.0.20-11, the Percona Parallel Doublewrite buffer implementation has been removed and has been replaced with the Oracle MySQL implementation.

New Features

  • PS-7128: Add RocksDB variables: rocksdb_max_background_compactions, rocksdb_max_background_flushes, and rocksdb_max_bottom_pri_background_compactions

  • PS-7039: Add RocksDB variable: rocksdb_validate_tables

  • PS-6951: Add RocksDB variables: rocksdb_delete_cf, rocksdb_enable_iterate_bounds, and rocksdb_enable_remove_orphaned_dropped_cfs

  • PS-6926: Add RocksDB variables: rocksdb_table_stats_recalc_threshold_pct, rocksdb_table_stats_recalc_threshold_count, rocksdb_table_stats_background_thread_nice_value, rocksdb_table_stats_max_num_rows_scanned, rocksdb_table_stats_use_table_scan.

  • PS-6910: Add RocksDB variable: rocksdb_stats_level.

  • PS-6902: Add RocksDB variable: rocksdb_enable_insert_with_update_caching.

  • PS-6901: Add RocksDB variable: rocksdb_read_free_rpl.

  • PS-6891: Add RocksDB variable: rocksdb_master_skip_tx_api.

  • PS-6890: Add RocksDB variable: rocksdb_blind_delete_primary_key.

  • PS-6886: Add RocksDB variable: rocksdb_cache_dump.

  • PS-6885: Add RocksDB variable: rocksdb_rollback_on_timeout.

Improvements

  • PS-6994: Implement rocksdb_validate_tables functionality in Percona Server 8.X

  • PS-6984: Update the zstd submodule to v1.4.4.

  • PS-5764: Introduce SEQUENCE_TABLE() table-level SQL function

Bugs Fixed

  • PS-7019: Correct query results for LEFT JOIN with GROUP BY (Upstream #99398)

  • PS-6979: Modify the processing to call clean up functions to remove CREATE USER statement from the processlist after the statement has completed (Upstream #99200)

  • PS-6860: Merge innodb_buffer_pool_pages_LRU_flushed into buf_get_total_stat()

  • PS-7038: Set innodb-parallel-read_threads=1 to prevent kill process from hanging (Thanks to user wavelet123 for reporting this issue)

  • PS-6945: Correct tokubackup plugin process exported API to allow large file backups. (Thanks to user prohaska7 for reporting this issue)

  • PS-7000: Fix newer collations for proper space padding in MyRocks

  • PS-6991: Modify package to include missing development files (Thanks to user larrabee for reporting this issue)

  • PS-6946: Correct tokubackup processing to free memory use from the address and thread sanitizers (Thanks to user prohaska7 for reporting this issue)

  • PS-5893: Add support for running multiple instances with systemD on Debian. (Thanks to user sasha for reporting this issue)

  • PS-5620: Modify Docker image to support supplying custom TLS certificates (Thanks to user agarner for reporting this issue)

  • PS-7168: Determine if file per tablespace using table flags to prevent assertion

  • PS-7161: Fixed ‘CreateTempFile’ gunit test to support both ‘HAVE_O_TMPFILE’-style

  • PS-7142: Set ‘KEYRING_VAULT_PLUGIN_OPT’ value when required

  • PS-7138: Correct file reference for ps-admin broken in tar.gz package

  • PS-7127: Provide mechanism to grant dynamic privilege to the utility user.

  • PS-7118: Add ability to set LOWER_CASE_TABLE_NAMES option before initializing data directory

  • PS-7116: Port MyRocks fix of Index Condition Pushdown (ICP)

  • PS-7075: Provide binary tarball with shared libs and glibc suffix

  • PS-6974: Correct instability in the rocksdb.drop_cf_* tests

  • PS-6969: Correct instability in the rocksdb.index_stats_large_table

  • PS-6105: Modify innodb.mysqld_core_dump_without_buffer_pool_dynamic test to move assertion to correct location

  • PS-5735: Correct package to install the charsets on CentOS 7

  • PS-4757: Remove CHECK_IF_CURL_DEPENDS_ON_RTMP to build keyring_vault for unconditional test

  • PS-7131: Improve resume_encryption_cond conditional variable handling to avoid missed signals

  • PS-7100: Fix rocksdb_read_free_rpl test to properly count rows corresponding to broken index entries

  • PS-7082: Correct link displayed on help client command

  • PS-7169: Set rocksdb_validate_tables to disabled RocksDB while upgrading the server from 5.7 to 8.0.20