mysql myisam 優化設置設置

myisam_max_[extra]_sort_file_size足夠大

delay_key_write減少io,提高寫入性能

bulk_insert_buffer_size

concurrent_insert 設置為2

read_rnd_buffer_size random scan 使用

read_buffer_size 順序掃描表使用

key cache 的三種方式

key cache 預加載

SET GLOBAL hot_cache.key_buffer_size=16m

SET BLOBAL cold_cache.key_buffer_size=16m

CACHE INDEX example.top_message IN hot_cache

CACHE INDEX example.event IN cold_cache

LOAD INDEX INTO CACHE example.top_message,example.event IGNORE LEAVES

LOAD INDEX INTO CACHE example.user IGNORE LEAVERS,expamle.groups

MySQL 優化設置步驟