Dictionary cache hit ratio - oracle database script

Dictionary cache hit ratio - Oracle Database Script.

SELECT sum(gets) AS "Gets",
       sum(getmisses) AS "Misses",
       (1-(sum(getmisses)/sum(gets)))*100 AS "CACHE HIT RATIO"
FROM gv$rowcache;

NOTE - CACHE HIT RATIO SHOULD BE
MORE THAN 95 PERCENT.