1.查询缓存相关
mysql> show variables like ‘%query_cache%‘; +------------------------------+----------+ | Variable_name | Value | +------------------------------+----------+ | have_query_cache | YES | | query_cache_limit | 1048576 | | query_cache_min_res_unit | 4096 | | query_cache_size | 67108864 | | query_cache_type | ON | | query_cache_wlock_invalidate | OFF | +------------------------------+----------+ 6 rows in set (0.00 sec)
have_query_cache 显示当前MySQL启动了查询缓存功能
query_cache_size 设置查询缓存的大小,以字节为单位,可以在/etc/my.cnf中设置
如query_cache_size= 64M。如果设置值为0表示关闭查询缓存
query_cache_limit 超过此大小的查询将不被缓存
mysql> show status like ‘%Qcache%‘; +-------------------------+----------+ | Variable_name | Value | +-------------------------+----------+ | Qcache_free_blocks | 1 | | Qcache_free_memory | 67099936 | | Qcache_hits | 0 | | Qcache_inserts | 0 | | Qcache_lowmem_prunes | 0 | | Qcache_not_cached | 12304 | | Qcache_queries_in_cache | 0 | | Qcache_total_blocks | 1 | +-------------------------+----------+ 8 rows in set (0.00 sec)
可以使用flush query cache;命令清空缓存
时间: 2024-09-29 09:44:43