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Buffer cache hit ration ( for week )


Buffer cache hit ration ( for week )

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OracleBoy
OracleBoy
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Group: General Forum Members
Points: 25 Visits: 74
Hi everybody , I need your help please :
I want to create a graph to show the progression of the "buffer cache hit ratio" for last 7 days (a week).
Until now I use this script (actual moment ) :


SELECT CAST(
(
SELECT CAST (cntr_value AS BIGINT)
FROM sys.dm_os_performance_counters
WHERE counter_name = 'Buffer cache hit ratio'
)* 100.00
/
(
SELECT CAST (cntr_value AS BIGINT)
FROM sys.dm_os_performance_counters
WHERE counter_name = 'Buffer cache hit ratio base'
) AS NUMERIC(6,3)
)


Grant Fritchey
Grant Fritchey
SSCoach
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Group: General Forum Members
Points: 17639 Visits: 32268
Just turn that same query into an INSERT ... SELECT... statement and save the data into a table along with the date and time that you collected the information. Then you can generate a report. There's no way just from the DMO you're querying to see what's happening over the week. You have to store that information in some manner.

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