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Average/Maximum Read/Write I/O Waits for tables

Posted on 2014-09-26
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Last Modified: 2014-09-30
Hello,

How can I collect Average/Maximum Read/Write I/O Waits for tables in db sql server?
Thanks
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Question by:bibi92
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6 Comments
 
LVL 49

Expert Comment

by:Vitor Montalvão
ID: 40345915
You can query the performance counters dmv:
SELECT * 
FROM sys.dm_os_performance_counters
WHERE counter_name LIKE '%IO wait%'
   OR counter_name LIKE 'write%'
   OR counter_name LIKE '%reads%'

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LVL 49

Expert Comment

by:Vitor Montalvão
ID: 40345922
Or if you are talking only in disk thresholds, then check if this query is what you want:
SELECT * FROM sys.dm_io_virtual_file_stats(default, default)

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Author Comment

by:bibi92
ID: 40348444
Hello,

I search the IO wait on tables.

Thanks

Regards
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LVL 49

Expert Comment

by:Vitor Montalvão
ID: 40349445
For that you have the sys.dm_os_wait_stats view.
Here the MSDN article about that view and information about all the wait types.
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Author Comment

by:bibi92
ID: 40350354
Ok thanks but I have not found how I can check io waits per tables.
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LVL 49

Accepted Solution

by:
Vitor Montalvão earned 500 total points
ID: 40351629
You need to understand the wait types so you can know which ones are you looking for.
Paul Randal's made a survey and he compiled the results of the most worrying wait type. You can start with those ones that are more typical for bottleneck issues.
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