最近发现一客户开发公司给部署的生产mysql数据库innodb_buffer_pool_size是默认值，物理内存为32G，结果很明显，性能问题很大。

建议设置innodb_buffer_pool_size 为物理内存的50%~80%为宜。
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: 67108864Duplicates: 0Warnings: 0mysql>