Q:

LOAD INDEX INTO CACHE replacement for InnoDB? MySQL

Is there a way to force index into cache for InnoDB tables?
The problem is I don't have enough memory to load all indexes into memory, so I want to cache particular ones.

A:

Loading the primary key (clustered) index:
SELECT COUNT(*) FROM tbl_name

Loading secondary index:
SELECT COUNT(*) FROM tbl_name FORCE INDEX(key_name)

