mysql Buffer pool hit rate

http://wubx.net/mysql_innodb_buffer_pool_hit/

show engine innodb status\G;
Buffer pool hit rate : XXXX/1000;
那个XXX/1000即是buffer pool hit ratios的命中.
这样也可以从代码里看一下这个bp命中计算:

1 2	storage/innobase/buf/buf0buf.c # void buf_print_io storage/innodbase/include/buf0buf.h #struct buf_block_struct