Question

I have some confusion about my mysql status.
mysql> show status like ‘%key%’;

+------------------------+-------+
| Variable_name          | Value |
+------------------------+-------+
| Com_assign_to_keycache | 0     |
| Com_preload_keys       | 0     |
| Com_show_keys          | 0     |
| Handler_read_key       | 2     |
| Key_blocks_not_flushed | 0     |
| Key_blocks_unused      | 13396 |
| Key_blocks_used        | 0     |
| Key_read_requests      | 0     |
| Key_reads              | 0     |
| Key_write_requests     | 0     |
| Key_writes             | 0     |

but,there have large (more then 1 billion each day) insert,update and query on the server,but why the status’s value is 0.The server has run nearly 3 days.(Uptime:2 days 18 hours 54 min 19 sec).I did not flush the server’s status.
Some db config engine = innodb,key_buffer = 16M, innodb_buffer_pool_size = 2147483648.
Thanks for any information.

Answer 1

Perhaps you’re using InnoDB tables ?

Those Key_XXX server status values are for MyISAM tables.