show演示

mysql>show status;
mysql>show status like 'Qcache%';
+-------------------------+-------+
| Variable_name           | Value |
+-------------------------+-------+
| Qcache_free_blocks      | 0     | 
| Qcache_free_memory      | 0     | 
| Qcache_hits             | 0     | 
| Qcache_inserts          | 0     | 
| Qcache_lowmem_prunes    | 0     | 
| Qcache_not_cached       | 0     | 
| Qcache_queries_in_cache | 0     | 
| Qcache_total_blocks     | 0     | 
+-------------------------+-------+
mysql>show status like 'uptime';
+---------------+---------+
| Variable_name | Value   |
+---------------+---------+
| Uptime        | 1703894 | 
+---------------+---------+

mysqladmin演示

#mysqladmin variables
#mysqladmin variables extended-status
#mysqladmin variables extended-status|grep -i -E '(table_cache|open_tables|opened_tables)'