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SQL Server 2008


SQL Server 2008

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Grace09
Grace09
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This is a clustered server. There are lots of databases on the server. Every once a while they ask me to add some databases up there in order to save some cost, which make me worried about the memory and IO performance. Check the CPU from task manager, cpu utilization seems to be fine.

Keith Tate (11/19/2013)
Are you just curious how your system is performing? Taking a baseline? Or is an issue you are dealing with and need help with? If you are having some performance issues please describe them and someone should be able to help you get the metrics you need.

Igor Micev
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Grace09 (11/19/2013)


You can use this link http://blogs.msdn.com/b/mvpawardprogram/archive/2012/06/04/using-sys-dm-os-ring-buffers-to-diagnose-memory-issues-in-sql-server.aspx
As you can see you can only see some info that you can see at other places on your system as well. However it's a useful dynamic view.

Thank you, IgorMi. I was reading somewhere to use sys.dm_os_ring_buffers to determine the memory pressure. I don't quite understand the result from querying sys.dm_os_ring_buffers table, which make me curious.

IgorMi (11/19/2013)
Grace09 (11/19/2013)
here is the result from the query, How should I interpret it? Thanks.

Node PageLife PageLife_S BufferPool_Pages BufferPool_MiB BufferPool_MiB_S
12:08:19 43699 5359046 41867.547 0.958
000 13:30:31 48631 1318060 10297.344 0.212
001 12:42:02 45722 1296655 10130.117 0.222
002 9:53:55 35635 1443304 11275.813 0.316
003 13:12:14 47534 1301027 10164.273 0.214


PLE is just one of the many performance counters. Having PLE in 9-13 hours is just a perfect situation. With this results you don't have a memory pressure.

Regards,
IgorMi



Igor Micev,
‌SQL Server developer at Seavus
www.seavus.com
Igor Micev
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This performance counters poster is still pretty excellent.
http://www.quest.com/backstage/images/promotions/SQLServer-Perfmonance-Poster.pdf
You can additionally use the OS performance monitor (perfmon.exe) to obtain the counters' values and make a comparison, in order to conclude how good is behaving your system.

Grace09 (11/19/2013)
This is a clustered server. There are a lots of databases on the server. Every once a while they ask me to add some databases up there in order to save some cost, which make me worried about the memory and IO performance. Check the CPU from task manager, cpu utilization seems to be fine.

Keith Tate (11/19/2013)
Are you just curious how your system is performing? Taking a baseline? Or is an issue you are dealing with and need help with? If you are having some performance issues please describe them and someone should be able to help you get the metrics you need.



Igor Micev,
‌SQL Server developer at Seavus
www.seavus.com
Keith Tate
Keith Tate
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Are you in a virtualized environment or bare metal?



Microsoft Certified Master - SQL Server 2008
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Keith Tate
Keith Tate
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Sounds like you need a baseline of the server and compare it after you add a new database. I would recommend you use Glenn Berry's DMV scripts to create that baseline:
http://sqlserverperformance.wordpress.com/tag/dmv-queries/

Also, if you want to create a system to capture the results check out Ted Krueger's blog post on that:
http://blogs.lessthandot.com/index.php/DataMgmt/DBAdmin/sql-server-baseline-collection

Glenn does an excellent job on giving you the metrics you need and describing what you should look for. If you have any specific questions please ask the forum.



Microsoft Certified Master - SQL Server 2008
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