can somebody give the query to find the average cache hit ratio ?
How to calculate it.
Good Judgement comes from Experience.
Experience comes from Bad Judgement
REM Checks database buffer hit ratio:
REM Hit Ratio= ( 1- (physical-reads/(db-block-gets+consistent-gets) ) )
select s1.value "Db block gets",
s2.value "Consistent gets",
s3.value "Physical reads",
round(100*(1-(s3.value/(s1.value+s2.value)))) "hit %"
from v$sysstat s1, v$sysstat s2, v$sysstat s3
where s1.name='db block gets'
and s2.name='consistent gets'
and s3.name='physical reads'
: without above coding there is no graphical way to get the hit ratio?!
[Edited by Alauddin on 08-20-2002 at 03:47 PM]