MariaDB

apt-get install mysql-utilities 查table statement mysqlfrm –diagnostic xxxxoooo.frm > t.sql remove t.sql not sql statme mysql -u root -pxxxooo database < t.sql

https://tools.percona.com/wizard/ # Generated by Percona Configuration Wizard (http://tools.percona.com/) version REL5-20120208 # Configuration name server generated for at 2017-04-26 15:24:40 [mysql] # CLIENT # port = 3306 socket = /var/lib/mysql/mysql.sock [mysqld] # GENERAL # user = mysql default-storage-engine = InnoDB socket = /var/lib/mysql/mysql.sock pid-file = /var/lib/mysql/mysql.pid # MyISAM # key-buffer-size = 32M myisam-recover = FORCE,BACKUP # SAFETY # max-allowed-packet = 16M max-connect-errors = 1000000 # DATA STORAGE # datadir = /var/lib/mysql/ ...

create user ‘root’@’%’ identified by ‘password’; grant ALL PRIVILEGES on *.* to ‘root’@’%’ with grant option; flush privileges; if error have root@localhost delete from mysql.user where user=‘root’; flush privileges; create user ‘root’@’%’ identified by ‘password’; grant ALL PRIVILEGES on *.* to ‘root’@’%’ with grant option; select user, host from user; show grants for ‘root’@’%’; FLUSH PRIVILEGES; =====restore root privileges===== http://stackoverflow.com/questions/1709078/how-can-i-restore-the-mysql-root-user-s-full-privileges UPDATE mysql.user SET Grant_priv=‘Y’, Super_priv=‘Y’ WHERE User=‘root’; ...

character-set-server = utf8mb4 #tunning skip_name_resolve = 1 open_files_limit = 65535 max_connect_errors = 1000000 table_open_cache = 1024 table_definition_cache = 1024 #table_open_cache_instances = 64 #MySQL 5.6 sort_buffer_size = 4M join_buffer_size = 4M interactive_timeout = 600 wait_timeout = 600 tmp_table_size = 32M max_heap_table_size = 32M #master_info_repository = TABLE #MySQL 5.6 #relay_log_info_repository = TABLE #MySQL 5.6 #gtid_mode = on #enforce_gtid_consistency = 1 read_buffer_size = 8M read_rnd_buffer_size = 4M bulk_insert_buffer_size = 64M lock_wait_timeout = 3600 #explicit_defaults_for_timestamp = 1 #MySQL 5.6 ...

http://tech.noredink.com/post/133347435578/optimizing-mysql-for-high-concurrency-on-amazon Looking for concurrency bottlenecks performance schema List the total maximum wait by event inside of InnoDB SELECT EVENT_NAME, SUM_TIMER_WAIT/1000000000 WAIT_MS, COUNT_STAR FROM performance_schema.events_waits_summary_global_by_event_name ORDER BY SUM_TIMER_WAIT DESC, COUNT_STAR DESC LIMIT 30; List current and last wait events on InnoDB. -- “what the current, or last completed, wait for each session was, and for exactly how long they waited” SELECT NAME, IF(PPS.THREAD_ID = 0, ‘Internal Thread’, CONCAT(IPS.USER, ‘@’, IPS.HOST)) USER, DB, COMMAND, STATE, TIME, EVENT_NAME LAST_WAIT, IF(TIMER_WAIT IS NULL , ‘Still Waiting’, TIMER_WAIT/1000000000) LAST_WAIT_MS FROM performance_schema.events_waits_current JOIN performance_schema.threads PPS USING (THREAD_ID) LEFT JOIN INFORMATION_SCHEMA.PROCESSLIST IPS ON IPS.ID = PPS.THREAD_ID; ...