# # FromDual configuration file template for MySQL, Galera Cluster, MariaDB and Percona Server # Location: %MYCNF% # This template is intended to work with MySQL 8.0 and newer and MariaDB 10.4 and newer # Get most recent updated from here: # https://www.fromdual.com/mysql-configuration-file-sample # [client] port = %PORT% # default 3306 socket = %SOCKET% # Use mysqld.sock on Ubuntu, conflicts with AppArmor otherwise [mysql] no_auto_rehash max_allowed_packet = 16M prompt = '\u@\h [\d]> ' # 'user@host [schema]> ' default_character_set = utf8 # Possibly this setting is correct for most recent Linux systems [mysqldump] max_allowed_packet = 16M [mysqld] # Connection and Thread variables # mysqlx = 0 # Disable Protocol X port = %PORT% # default 3306 socket = %SOCKET% # Use mysqld.sock on Ubuntu, conflicts with AppArmor otherwise basedir = %BASEDIR% datadir = %DATADIR% # tmpdir = '%INSTANCEDIR%/tmp' # innodb_tmpdir = '%INSTANCEDIR%/tmp' max_allowed_packet = 16M default_storage_engine = InnoDB # explicit_defaults_for_timestamp = 1 # default in MySQL 8.0, and MariaDB 10.10 and newer. Test carefully! This can have an impact on application. # character_set_server = utf8mb4 # For modern applications, default in MySQL 8.0 # collation_server = utf8mb4_general_ci max_connections = 151 # Values < 1000 are typically good max_user_connections = 145 # Limit one specific user/application thread_cache_size = 151 # Up to max_connections makes sense # Query Cache (does not exist in MySQL 8.0 any more!) # query_cache_type = 1 # Set to 0 to avoid global QC Mutex, removed in MySQL 8.0 # query_cache_size = 32M # Avoid too big (> 128M) QC because of QC clean-up lock!, removed in MySQL 8.0 # Session variables sort_buffer_size = 2M # Could be too big for many small sorts tmp_table_size = 32M # Make sure your temporary results do NOT contain BLOB/TEXT attributes read_buffer_size = 128k # Resist to change this parameter if you do not know what you are doing read_rnd_buffer_size = 256k # Resist to change this parameter if you do not know what you are doing join_buffer_size = 128k # Resist to change this parameter if you do not know what you are doing # Other buffers and caches table_definition_cache = 1400 # As big as many tables you have table_open_cache = 2000 # connections x tables/connection (~2) # MySQL error log log_error = %INSTANCEDIR%/log/%UNAME%_%INSTANCE%_error.log # Adjust AppArmor configuration: /etc/apparmor.d/local/usr.sbin.mysqld # log_timestamps = SYSTEM # MySQL 5.7, equivalent to old behaviour # log_warnings = 2 # MariaDB equivalent to log_error_verbosity = 3, MySQL does NOT support this any more! # log_error_verbosity = 3 # MySQL 5.7 ff., equivalent to log_warnings = 2, MariaDB does NOT support this! innodb_print_all_deadlocks = 1 # wsrep_log_conflicts = 1 # for Galera only! # Slow Query Log slow_query_log_file = %INSTANCEDIR%/log/%UNAME%_%INSTANCE%_slow.log # Adjust AppArmor configuration: /etc/apparmor.d/local/usr.sbin.mysqld slow_query_log = 0 log_queries_not_using_indexes = 0 # Interesting on developer systems! long_query_time = 0.5 min_examined_row_limit = 100 # General Query Log general_log_file = %INSTANCEDIR%/log/%UNAME%_%INSTANCE%_general.log # Adjust AppArmor configuration: /etc/apparmor.d/local/usr.sbin.mysqld general_log = 0 # Performance Schema performance_schema = ON performance_schema_consumer_events_statements_history_long = ON # performance_schema_instrument = 'memory/%=COUNTED' # Binary logging and Replication server_id = %SERVERID% # Must be set on MySQL 5.7 and newer if binary log is enabled! log_bin = %INSTANCEDIR%/binlog/%UNAME%_%INSTANCE%_binlog # Locate outside of datadir, adjust AppArmor configuration: /etc/apparmor.d/local/usr.sbin.mysqld # master_verify_checksum = ON # binlog_cache_size = 1M # For each connection! # binlog_stmt_cache_size = 1M # For each connection! max_binlog_size = 128M # Make bigger for high traffic to reduce number of files sync_binlog = 1 # Set to 0 or higher to get better write performance, default since MySQL 5.7 expire_logs_days = 5 # We will survive Easter holidays, NOT in MySQL 8.0 any more! # binlog_expire_logs_seconds = 432000 # MariaDB 10.6 and MySQL 8.0, 5 days * 86400 seconds binlog_format = ROW # Use MIXED if you want to experience some troubles, default since MySQL 5.7, MariaDB default is MIXED # auto_increment_increment = 2 # For Master/Master set-ups use 2 for both nodes # auto_increment_offset = 1 # For Master/Master set-ups use 1 and 2 # Slave variables log_slave_updates = ON # Use if Slave is used for Backup and PiTR, default since MySQL 8.0 read_only = 0 # Set to 1 to prevent writes on Slave # super_read_only = 0 # Set to 1 to prevent writes on Slave for users with SUPER privilege. Since 5.7, not in MariaDB # skip_slave_start = 1 # To avoid start of Slave thread # relay_log = %UNAME%_%INSTANCE%_relay-bin # slave_load_tmpdir = '%INSTANCEDIR%/tmp' # defaults to tmpdir # Crash-safe replication Master # sync_binlog = 1 # default since 5.7.6, but slow! # Crash-safe replication Slave # relay_log_recovery = 1 # sync_relay_log_info = 1 # default 10000 # relay_log_purge = 1 # default # slave_sql_verify_checksum = 1 # default # GTID replication # gtid_mode = ON # MySQL only, Master and Slave # enforce_gtid_consistency = 1 # MySQL only, Master and Slave # log_bin = %INSTANCEDIR%/binlog/%UNAME%_%INSTANCE%_binlog # log_slave_updates = ON # Security variables # local_infile = 0 # If you are security aware # secure_auth = 1 # If you are security aware # sql_mode = TRADITIONAL,ONLY_FULL_GROUP_BY,NO_ENGINE_SUBSTITUTION,STRICT_ALL_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO # Be careful changing this afterwards, NO_AUTO_CREATE_USER does NOT exist any more in MySQL 8.0 # skip_name_resolve = 0 # Set to 1 if you do not trust your DNS or experience problems # secure_file_priv = '%INSTANCEDIR%/tmp' # chmod 750, adjust AppArmor configuration: /etc/apparmor.d/local/usr.sbin.mysqld # MyISAM variables key_buffer_size = 8M # Set to 25 - 33 % of RAM if you still use MyISAM myisam_recover_options = 'BACKUP,FORCE' # disabled_storage_engines = 'MyISAM,MEMORY' # MySQL 5.7, do NOT during/before mysql_upgrade, good for Galera! # MEMORY variables max_heap_table_size = 64M # Should be greater or equal to tmp_table_size # InnoDB variables innodb_buffer_pool_size = 128M # Go up to 75% of your available RAM # innodb_buffer_pool_instances = 8 # Bigger if huge InnoDB Buffer Pool or high concurrency, desupported in MariaDB 10.5 ff. innodb_file_per_table = 1 # Is the recommended way nowadays # innodb_flush_method = O_DIRECT # O_DIRECT is sometimes better for direct attached storage # innodb_write_io_threads = 8 # If you have a strong I/O system or SSD # innodb_read_io_threads = 8 # If you have a strong I/O system or SSD # innodb_io_capacity = 1000 # If you have a strong I/O system or SSD innodb_flush_log_at_trx_commit = 2 # 1 for durability, 0 or 2 for performance innodb_log_buffer_size = 16M # Bigger if innodb_flush_log_at_trx_commit = 0 innodb_log_file_size = 256M # Bigger means more write throughput but longer recovery time # innodb_log_files_in_group = 2 # Desupported in MariaDB 10.6 # innodb_redo_log_capacity = 512M # Bigger means more write throughput but longer recovery time innodb_monitor_enable = all # Overhead < 1% according to PeterZ/Percona # Galera specific MySQL parameter # default_storage_engine = InnoDB # Galera only works with InnoDB # innodb_flush_log_at_trx_commit = 2 # Durability is achieved by committing to the Group # innodb_autoinc_lock_mode = 2 # For parallel applying # binlog_format = ROW # Galera only works with RBR # query_cache_type = 0 # Use QC with Galera only in a Master/Slave set-up, removed in MySQL 8.0 # query_cache_size = 0 # removed in MySQL 8.0 # log_slave_updates = ON # Must be enabled on ALL Galera nodes if binary log is enabled! # server_id = ... # Should be equal on all Galera nodes according to Codership CTO if binary log is enabled. # WSREP parameter # wsrep_on = on # Only MariaDB # wsrep_provider = /usr/lib/galera/libgalera_smm.so # Location of Galera Plugin on Ubuntu ? # wsrep_provider = /usr/lib64/galera-3/libgalera_smm.so # Location of Galera v3 Plugin on CentOS 7 # wsrep_provider = /usr/lib64/galera-4/libgalera_smm.so # Location of Galera v4 Plugin on CentOS 7 # wsrep_provider_options = 'gcache.size = 1G' # Depends on you workload, WS kept for IST # wsrep_provider_options = 'gcache.recover = on' # Since 3.19, tries to avoid SST after crash # wsrep_cluster_name = "My cool Galera Cluster" # Same Cluster name for all nodes # wsrep_cluster_address = "gcomm://192.168.0.1,192.168.0.2,192.168.0.3" # Start other nodes like this # wsrep_node_name = "Node A" # Unique node name # wsrep_node_address = 192.168.0.1 # Our address where replication is done # wsrep_node_incoming_address = 10.0.0.1 # Our external interface where application comes from # wsrep_sync_wait = 1 # If you need realy full-synchronous replication (Galera 3.6 and newer) # wsrep_slave_threads = 16 # 4 - 8 per core, not more than wsrep_cert_deps_distance # wsrep_sst_method = rsync # SST method (initial full sync): mysqldump, rsync, rsync_wan, xtrabackup-v2 # wsrep_sst_auth = sst:secret # Username/password for sst user # wsrep_sst_receive_address = 192.168.2.1 # Our address where to receive SST # Group Replication parameter # default_storage_engine = InnoDB # Group Replication only works with InnoDB # server_id = %SERVERID% # Should be different on all 3 nodes # log_bin = %INSTANCEDIR%/binlog/%UNAME%_%INSTANCE%_binlog # Locate outside of datadir, adjust AppArmor configuration: /etc/apparmor.d/local/usr.sbin.mysqld # binlog_format = ROW # binlog_checksum = NONE # not default! # gtid_mode = ON # enforce_gtid_consistency = ON # master_info_repository = TABLE # relay_log_info_repository = TABLE # log_slave_updates = ON # slave_parallel_workers = n # 1-2/core, max. 10 # slave_preserve_commit_order = ON # slave_parallel_type = LOGICAL_CLOCK # transaction_write_set_extraction = XXHASH64 # loose-group_replication_group_name = "$(uuidgen)" # Must be the same on all nodes # loose-group_replication_start_on_boot = OFF # loose-group_replication_local_address = "192.168.0.1" # loose-group_replication_group_seeds = "192.168.0.1,192.168.0.2,192.168.0.3" # All nodes of Cluster # loose-group_replication_bootstrap_group = OFF # loose-group_replication_single_primary_mode = FALSE # = multi-primary