最近發現一客戶開發公司給部署的生產mysql數據庫innodb_buffer_pool_size是默認值，物理內存爲32G，結果很明顯，性能問題很大。
建議設置innodb_buffer_pool_size 爲物理內存的50%~80%爲宜。
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>