MySQL RROR 1206 (HY000):

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最近發現一客戶開發公司給部署的生產mysql資料庫innodb_buffer_pool_size是預設值，實體記憶體為32G，結果很明顯，效能問題很大。

建議設定innodb_buffer_pool_size 為實體記憶體的50%~80%為宜。
ERROR 1206 (HY000): The total number of locks exceeds the lock table size

-bash-4.1$ ./mysql -uroot -pEnter password: Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 3Server version: 5.7.19-log MySQL Community Server (GPL)Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.mysql> mysql> show variables like ‘innodb_buffer_pool_size‘;+-------------------------+----------+| Variable_name           | Value    |+-------------------------+----------+| innodb_buffer_pool_size | 67108864 |+-------------------------+----------+1 row in set (0.00 sec)mysql> use test;Reading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changedmysql> insert into t select * from t;ERROR 1206 (HY000): The total number of locks exceeds the lock table sizemysql> mysql> set global innodb_buffer_pool_size=1024000*1024    -> ;Query OK, 0 rows affected, 1 warning (0.01 sec)mysql> insert into t select * from t;Query OK, 67108864 rows affected (8 min 53.81 sec)Records: 67108864  Duplicates: 0  Warnings: 0mysql> 

MySQL RROR 1206 (HY000):