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Performance monitor VS  sys.dm_os_performance_counters

Posted on 2014-12-07
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Last Modified: 2014-12-10
Hi Experts ,

Does anyone knows why some counters values are different in performance monitor and sys.dm_os_performance_counters . and how can I make them equal.
For example buffer cache hit ratio is almost 100 in performance monitor but in DMV is different . or Checkpoint pages/sec  is  0  in performance monitor and in DMV is more than 80000.

Regards
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Question by:shahin37
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Expert Comment

by:Vitor Montalvão
ID: 40486323
Please give us an example (screenshot).
Also confirm that you are watching for the same instances in both counters.
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Author Comment

by:shahin37
ID: 40488016
Hi Vitor,

here is the screen shot, I hope it helps you to diagnose the issue.
Counters.png
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Vitor Montalvão earned 500 total points
ID: 40488514
Ok, now I see what you are talking about.
They are on different scale. For example for Buffer cache hit ratio, in SQL Server you get the number of pages in buffer cache and in Performance Monitor you get the percentage used.
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by:shahin37
ID: 40493012
Thanks Vitor
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