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 -p
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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 names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> insert into t select * from t;
ERROR 1206 (HY000): The total number of locks exceeds the lock table size
mysql> 
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: 0

mysql>