mysql5.7优化
1：查询显示当前的隔离级别
mysql> show global variables like '%isolation%';
+-----------------------+----------------+
| Variable_name | Value |
+-----------------------+----------------+
| transaction_isolation | REPEATABLE-READ|
| tx_isolation | REPEATABLE-READ|
+-----------------------+----------------+
2 rows in set (0.00 sec)2：设置隔离级别
mysql> set global transaction_isolation ='read-committed';
Query OK, 0 rows affected (0.00 sec)
mysql> show global variables like '%isolation%';
+-----------------------+----------------+
| Variable_name | Value |
+-----------------------+----------------+
| transaction_isolation | READ-COMMITTED |
| tx_isolation | READ-COMMITTED |
+-----------------------+----------------+
2 rows in set (0.00 sec)3：优化批量删除
DELETE FROM re_detail_his where
order_id in (select order_id from re_orders where shop_id = #{shopId} and sale_date between #{startDate} and #{endDate} )
delete a from re_detail_his a join re_orders b on a.order_id=b.order_id where b.shop_id = #{shopId} AND b.sale_date BETWEEN #{startDate} and #{endDate}
第2条是优化后的，效率大大提升
3：查询锁
SELECT 'Blocker' role , p.id , p.user , left(p.host, locate(':', p.host) - 1) HOST , tx.trx_id , tx.trx_state , tx.trx_started , lo.lock_table , tx.trx_query , timestampdiff(SECOND, tx.trx_started, now()) duration , lo.lock_mode , lo.lock_type , lo.lock_index , tx.trx_tables_in_use , tx.trx_tables_locked , tx.trx_rows_locked FROM information_schema.innodb_trx tx JOIN information_schema.innodb_lock_waits lw ON lw.blocking_trx_id = tx.trx_id JOIN information_schema.innodb_locks lo ON lo.lock_trx_id = tx.trx_id JOIN information_schema.processlist p ON p.id = tx.trx_mysql_thread_id UNION SELECT 'Blockee' role , p.id , p.user , left(p.host, locate(':', p.host) - 1) HOST , tx.trx_id , tx.trx_state , tx.trx_started , lo.lock_table , tx.trx_query , timestampdiff(SECOND, tx.trx_started, now()) duration , lo.lock_mode , lo.lock_type , lo.lock_index , tx.trx_tables_in_use , tx.trx_tables_locked , tx.trx_rows_locked FROM information_schema.innodb_trx tx JOIN information_schema.innodb_lock_waits lw ON lw.requesting_trx_id = tx.trx_id JOIN information_schema.innodb_locks lo ON lo.lock_trx_id = tx.trx_id JOIN information_schema.processlist p ON p.id = tx.trx_mysql_thread_id;
mysql> SELECT 'Blocker' role , p.id , p.user , left(p.host, locate(':', p.host) - 1) HOST , tx.trx_id , tx.trx_state , tx.trx_started , lo.lock_table , tx.trx_query , timestampdiff(SECOND, tx.trx_started, now()) duration , lo.lock_mode , lo.lock_type , lo.lock_index , tx.trx_tables_in_use , tx.trx_tables_locked , tx.trx_rows_locked FROM information_schema.innodb_trx tx JOIN information_schema.innodb_lock_waits lw ON lw.blocking_trx_id = tx.trx_id JOIN information_schema.innodb_locks lo ON lo.lock_trx_id = tx.trx_id JOIN information_schema.processlist p ON p.id = tx.trx_mysql_thread_id UNION SELECT 'Blockee' role , p.id , p.user , left(p.host, locate(':', p.host) - 1) HOST , tx.trx_id , tx.trx_state , tx.trx_started , lo.lock_table , tx.trx_query , timestampdiff(SECOND, tx.trx_started, now()) duration , lo.lock_mode , lo.lock_type , lo.lock_index , tx.trx_tables_in_use , tx.trx_tables_locked , tx.trx_rows_locked FROM information_schema.innodb_trx tx JOIN information_schema.innodb_lock_waits lw ON lw.requesting_trx_id = tx.trx_id JOIN information_schema.innodb_locks lo ON lo.lock_trx_id = tx.trx_id JOIN information_schema.processlist p ON p.id = tx.trx_mysql_thread_id;
Empty set, 4 warnings (0.01 sec)
有锁的情况
mysql> SELECT
-> 'Blocker' role
-> , p.id
-> , p.user
-> , left(p.host, locate(':', p.host) - 1) HOST
-> , tx.trx_id
-> , tx.trx_state
-> , tx.trx_started
-> , lo.lock_table
-> , tx.trx_query
-> , timestampdiff(SECOND, tx.trx_started, now()) duration
-> , lo.lock_mode
-> , lo.lock_type
-> , lo.lock_index
-> , tx.trx_tables_in_use
-> , tx.trx_tables_locked
-> , tx.trx_rows_locked
-> FROM
-> information_schema.innodb_trx tx
-> JOIN information_schema.innodb_lock_waits lw
-> ON lw.blocking_trx_id = tx.trx_id
-> JOIN information_schema.innodb_locks lo
-> ON lo.lock_trx_id = tx.trx_id
-> JOIN information_schema.processlist p
-> ON p.id = tx.trx_mysql_thread_id
-> UNION
-> SELECT
-> 'Blockee' role
-> , p.id
-> , p.user
-> , left(p.host, locate(':', p.host) - 1) HOST
-> , tx.trx_id
-> , tx.trx_state
-> , tx.trx_started
-> , lo.lock_table
-> , tx.trx_query
-> , timestampdiff(SECOND, tx.trx_started, now()) duration
-> , lo.lock_mode
-> , lo.lock_type
-> , lo.lock_index
-> , tx.trx_tables_in_use
-> , tx.trx_tables_locked
-> , tx.trx_rows_locked
-> FROM
-> information_schema.innodb_trx tx
-> JOIN information_schema.innodb_lock_waits lw
-> ON lw.requesting_trx_id = tx.trx_id
-> JOIN information_schema.innodb_locks lo
-> ON lo.lock_trx_id = tx.trx_id
-> JOIN information_schema.processlist p
-> ON p.id = tx.trx_mysql_thread_id;
+---------+-----+----------+-----------+-----------+-----------+---------------------+-------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------+-----------+-----------+--------------+-------------------+-------------------+-----------------+
| role | id | user | HOST | trx_id | trx_state | trx_started | lock_table | trx_query | duration | lock_mode | lock_type | lock_index | trx_tables_in_use | trx_tables_locked | trx_rows_locked |
+---------+-----+----------+-----------+-----------+-----------+---------------------+-------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------+-----------+-----------+--------------+-------------------+-------------------+-----------------+
| Blocker | 121 | jiangxin | localhost | 125439453 | RUNNING | 2020-01-03 11:38:18 | `jxx_order`.`re_orders` | DELETE FROM re_discount_his WHERE order_id IN (SELECT order_id FROM re_orders WHERE shop_id = 50352 AND sale_date BETWEEN '2019-12-01' AND '2020-01-01') | 3 | S,GAP | RECORD | idx_order_id | 2 | 2 | 230233 |
| Blocker | 121 | jiangxin | localhost | 125439453 | RUNNING | 2020-01-03 11:38:18 | `jxx_order`.`re_discount_his` | DELETE FROM re_discount_his WHERE order_id IN (SELECT order_id FROM re_orders WHERE shop_id = 50352 AND sale_date BETWEEN '2019-12-01' AND '2020-01-01') | 3 | X | RECORD | PRIMARY | 2 | 2 | 230233 |
| Blockee | 129 | jiangxin | localhost | 125439863 | LOCK WAIT | 2020-01-03 11:38:21 | `jxx_order`.`re_orders` | INSERT INTO re_orders (location_id, shop_id, shop_name, sale_date, order_id, order_time, check_time, amount, fact_amount, ds_amount, direct_amount, addfee, chargeback, is_chargeback, hall_id, hall_name, table_id, table_name, people_num, discount_type, discount, palm_id, is_payoff, tipa, pay_way, shop_order_id, islive, order_type, renum, cashier_code, cashier_name, pos_id, sum_mfact, sum_dfact, sum_pay, dept_id, tenant_id) VALUES ('18', 50784, '龙子湖店', '2020-01-03', '5078400181625', '2020-01-03 11:17:33.0', '2020-01-03 11:17:49.0', 25, 25, 0, 0, 0, 0, 0, 1, 'A区', 7, '东C7', 1, 0, 1, '刘桂珍', 1, 2, '金石支付:25;', '00181625', 0, 0, 0, '收银员', '001', '0', 25, 0, 25, 106, 1020) | 0 | X,GAP | RECORD | idx_order_id | 1 | 1 | 1 |
| Blockee | 132 | jiangxin | localhost | 125439832 | LOCK WAIT | 2020-01-03 11:38:20 | `jxx_order`.`re_discount_his` | DELETE FROM re_discount_his WHERE shop_id = 50379 AND shop_order_id = '00022921' | 1 | X | RECORD | PRIMARY | 1 | 1 | 2 |
| Blockee | 119 | jiangxin | localhost | 125439823 | LOCK WAIT | 2020-01-03 11:38:20 | `jxx_order`.`re_orders` | INSERT INTO re_orders (location_id, shop_id, sale_date, order_id, order_time, check_time, amount, fact_amount, ds_amount, direct_amount, addfee, chargeback, is_chargeback, hall_id, hall_name, table_id, table_name, people_num, discount_type, discount, palm_id, is_payoff, tipa, pay_way, shop_order_id, islive, order_type, renum, cashier_code, cashier_name, pos_id, sum_mfact, sum_dfact, sum_pay, dept_id, tenant_id) VALUES ('1', 50746, '2020-01-03', '5074600005468', '2020-01-03 11:24:50.0', '2020-01-03 11:25:38.0', 16, 16, 0, 0, 0, 0, 0, 1, '大厅', 2, '2', 1, 0, 1, '收银员', 1, 2, '微储值:16;', '00005468', 0, 0, 0, '收银员', '收银员', '0', 16, 0, 16, 1, 1) | 1 | X,GAP | RECORD | idx_order_id | 1 | 1 | 1 |
| Blockee | 131 | jiangxin | localhost | 125439717 | LOCK WAIT | 2020-01-03 11:38:19 | `jxx_order`.`re_orders` | INSERT INTO re_orders (location_id, shop_id, shop_name, sale_date, order_id, order_time, check_time, amount, fact_amount, ds_amount, direct_amount, addfee, chargeback, is_chargeback, hall_id, hall_name, table_id, table_name, people_num, discount_type, discount, palm_id, is_payoff, tipa, pay_way, shop_order_id, islive, order_type, renum, cashier_code, cashier_name, pos_id, sum_mfact, sum_dfact, sum_pay, dept_id, tenant_id) VALUES ('1', 50751, '嘉味扬州万象汇店', '2020-01-03', '5075100004338', '2020-01-03 11:26:46.0', '2020-01-03 11:27:03.0', 59, 59, 0, 0, 0, 0, 0, 4, '外卖区', 69, '美团9', 1, 0, 1, '收银员', 1, 0, '微支一键付:59;', '00004338', 0, 0, 0, '收银员', '101', '0', 59, 0, 59, 1, 1) | 2 | X,GAP | RECORD | idx_order_id | 1 | 1 | 1 |
| Blockee | 123 | jiangxin | localhost | 125439636 | LOCK WAIT | 2020-01-03 11:38:19 | `jxx_order`.`re_orders` | INSERT INTO re_orders (location_id, shop_id, shop_name, sale_date, order_id, order_time, check_time, amount, fact_amount, ds_amount, direct_amount, addfee, chargeback, is_chargeback, hall_id, hall_name, table_id, table_name, people_num, discount_type, discount, palm_id, is_payoff, tipa, pay_way, shop_order_id, islive, order_type, renum, cashier_code, cashier_name, pos_id, sum_mfact, sum_dfact, sum_pay, dept_id, tenant_id) VALUES ('18', 50784, '龙子湖店', '2020-01-03', '5078400181626', '2020-01-03 11:19:00.0', '2020-01-03 11:19:13.0', 2, 2, 0, 0, 0, 0, 0, 2, 'B区', 111, '外卖1', 0, 0, 1, '刘桂珍', 1, 2, '金石支付:2;', '00181626', 0, 0, 0, '收银员', '001', '0', 2, 0, 2, 106, 1020) | 2 | X,GAP | RECORD | idx_order_id | 1 | 1 | 1 |
+---------+-----+----------+-----------+-----------+-----------+---------------------+-------------------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+----------+-----------+-----------+--------------+-------------------+-------------------+-----------------+
7 rows in set, 4 warnings (0.03 sec)4： 自动清理binlog
[mysqld]
...
#开启binary log
log-bin=mysql-bin
#日志超过3天自动过期
expire_logs_days = 3手动清理：
mysql> show binary logs;
+------------------+------------+
| Log_name | File_size |
+------------------+------------+
| mysql-bin.000020 | 1073742332 |
mysql> purge binary logs to 'mysql-bin.000060';
Query OK, 0 rows affected (1.54 sec)