select sum(getmisses)/sum(gets)*100 pool_size from v$rowcache

Connect time(ms): 31

Connected to jdbc:oracle:thin:@lfpplm:1521:wind
Driver       Oracle JDBC driver
Version      9.2.0.5.0

Query time & data xfer(ms): 0

POOL_SIZE
3.05870343639597106696546059189906932604E01