1. Rock-Solid Performance with SQL Server 2008 Resource Governor
11/16/ :26 AM
Rock-Solid Performance with SQL Server 2008 Resource Governor
Riaan Vermeulen
Eclipse Networks
© 2009 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

2. Session Objectives and Takeaways
11/16/2018
Session Objectives and Takeaways
Why is the Resource Governor so important?
How does it work?
How and when should you use it?
What have we learned?
© 2008 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

3. The history of things before...
...related to Hardware Resource issues
Run-away queries on the server.
Unpredictable workload execution.
Client: “It ran just fine yesterday! Why is it so slow today?”
DBA: “Okay, who else is using the system?”
Client: “WELL JUST ABOUT EVERYONE! Who else?”
Managing quality of service
Client: “Oh and by the way, my report is the most important one!”
Run-away queries on the server:
* A resource intensive query can take up most or all of the server resources.
Unpredictable workload execution:
* Concurrent applications on the same server have workloads of different size and type.
For example, two data warehouse applications or a mix of OLTP and data warehouse applications.
These applications are not isolated from each other and the resulting resource contention causes
unpredictable workload execution.
Setting workload priority:
* One workload is allowed to proceed faster than another or is guaranteed to complete if there is resource contention.
Resource Governor enables you to assign a relative importance to workloads.

4. Quote
“Having a method to control resource usage by applications allows you to consider consolidating SQL Server instances knowing you can control resources if necessary. Being able to control your machine resource when more than one application is placed on a single SQL Server machine, and running that machine closer to capacity, will allow your organization to reduce hardware and license costs associated with SQL Server ” – Gregory A. Larsen, DevX.com

5. Why is the Resource Governor so important?
Statement:
It enables DBAs to manage SQL Server workload and critical system resource consumption
Ponder moment!
Puts you back in control of your resources
If done properly, virtually eliminates resource contention (…related to hardware)
QUESTION:
So why is something like the Resource Governor so important?
ANSWER:
It enables DBAs to manage SQL Server workloads and critical system resource consumption
IN OTHER WORDS!!!
Puts you back in control of your resources
Could potentially eliminate hardware resource contention

6. Let’s get serious for a moment!
Resource Governor provides:
The ability to classify incoming connections and route their workloads to a specific group (with predefined resources).
The ability to monitor resource usage for each workload in a group.

7. Let’s get serious for a moment!2
Let’s get serious for a moment!
Resource Governor provides:
The ability to pool resources and set pool-specific limits on CPU usage and memory allocation. This prevents or minimizes the probability of run-away queries.
The ability to associate grouped workloads with a specific pool of resources.
The ability to identify and set priorities for workloads.

8. Resource Governor How does it work? Resource Pools Workload Group
Understanding The Concepts
Resource Governor
Resource Pools
Workload Group
Classification
NEED TO UNDERSTAND THE THREE UNDERLYING CONCEPTS OF THE RESOURCE GOVERNOR
CLASSIFICATIONS
WORKLOAD GROUPS
RESOURCE POOLS

9. The Concepts 1 Resource Pool Set create limits for resource usage.
Resource Governor
Resource Pool
Workload Group
Classification
Resource Pool
Set create limits for resource usage.
Applied only if other applications require the resources. Thus, MAX settings are only enforced when contention occurs
E.g. If a pool has a max CPU of 10% and another at 90%, why can a query from pool1 exceed 10% CPU?
RESOURCE POOL:
The resource pool enables you to create limits for resource usage. These limits are applied if other applications require the resources. If no other applications are running, the limits are not applied
CLASSIFICATIONS:
Classification functions group applications into workload groups so that limits can then be applied to their resource usage

10. The Concepts 2 Resource Pool (Continued…)
Resource Governor
Resource Pool
Workload Group
Classification
Resource Pool (Continued…)
Resource pool settings can be complex…
Sum of all MINs cannot exceed 100%
All resource pools guarantees their MIN setting
Any resources left over are shared
E.g. Two pools with MIN of 40% each leaves 20% to share
E.g. Two pools with 50% each leaves nothing to share
If the total of all pools’ MINs are 100%, then each pool’s MIN is also it’s MAX, regardless of the MAX setting
The internal pool does not count in these calculations and can pressure other pools
RESOURCE POOL:
The resource pool enables you to create limits for resource usage. These limits are applied if other applications require the resources. If no other applications are running, the limits are not applied

11. The Concepts 3 Workload Groups
Resource Governor
Resource
Pool
Workload Group
Classification
Workload Groups
way of grouping together queries, tasks,
user connections, etc
E.g. batch processes, reports, executives, helpdesk, maintenance
Assigned to a specific resource pool
Internal tasks (e.g. checkpoint, ghost cleanup) always are part of the internal group
There is a default group which cannot be changed and provides the behavior of no resource governor running (i.e. behavior of previous versions)
WORKLOAD GROUP DEFINITION!!!!
You can think about a workload group as a container or bucket for a set of similar queries or tasks, and the purpose of the group is to route requests in the group to a specific resource pool. The separation is there because, while with a resource pool you can control CPU and memory, adding a layer for workload groups allows you to add additional controls for different sets of requests across the same “slice” of the instance’s resources. For example, you might have a resource pool for the engineering department, but you might want to create a separate workload group for testers or quality assurance folks so they don’t inadvertently take too many resources, or for your boss so that his queries finish faster than yours (or vice versa).

12. The Concepts 4 Classification Functions
Resource Governor
Resource
Pool
Workload Group
Classification
Classification Functions
Classification functions group applications into
workload groups so that limits can then be applied
to their resource usage.
Incoming connections are classified into workload groups using a T-SQL user-defined function
Takes no parameters and returns group name as a sysname type
Plenty of functions to use:
HOST_NAME(), APP_NAME(), SUSER_NAME(), SUSER_SNAME(), IS_SRVROLEMEMBER(), and IS_MEMBER().
CLASSIFICATION DEFINITION!!!!
Classification functions group applications into workload groups so that limits can then be applied to their resource usage
Plenty of functions to use:
HOST_NAME, APP_NAME, SUSER_NAME, IS_MEMBER, new CONNECTIONPROPERTY

13. Summary User connects Connection is:
Classified & Assigned to a workload group
Workload group is already bound to a pool with limits
Queries execute within the limits of the pool

14. In Practise Not Enabled by Default! 1 RESOURCE POOL:
The resource pool enables you to create limits for resource usage. These limits are applied if other applications require the resources. If no other applications are running, the limits are not applied
CLASSIFICATIONS:
Classification functions group applications into workload groups so that limits can then be applied to their resource usage

15. Configure Resource Governor
11/16/ :26 AM
demo
Configure Resource Governor
© 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

16. Dynamic Control Simple syntax to start, stop, and make changes
ALTER RESOURCE GOVERNOR {DISABLE | RECONFIGURE}
RECONFIGURE starts the governor if it’s currently disabled
After a pool/group is created or altered, the changes can be immediately applied to the resource governor by issuing a RECONFIGURE statement
Obviously pools and groups can’t be dropped it they are in use
There may be a transition period if you lower available memory or CPU for a pool
RESOURCE POOL:
The resource pool enables you to create limits for resource usage. These limits are applied if other applications require the resources. If no other applications are running, the limits are not applied
CLASSIFICATIONS:
Classification functions group applications into workload groups so that limits can then be applied to their resource usage

17. Monitoring System Monitor objects: DMVs
Instance per pool: SQLServer: Resource Pool Stats (11 counters)
Instance per group: SQLServer: Workload Group Stats (14 counters)
DMVs
sys.dm_resource_governor_configuration
sys.dm_resource_governor_resource_pools
sys.dm_resource_governor_workload_groups
RESOURCE POOL:
The resource pool enables you to create limits for resource usage. These limits are applied if other applications require the resources. If no other applications are running, the limits are not applied
CLASSIFICATIONS:
Classification functions group applications into workload groups so that limits can then be applied to their resource usage

18. 11/16/ :26 AM
demo
Monitoring
© 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

19. It’s Limitations
Works with the Database Engine Instance Level!!!
Single instance only
Each instance controlled individually
Can be combined with Windows System Resource Manager (WSRM) on Windows Server 2003 for CPU and memory control
Controls for CPU usage and memory allocation ONLY
I/O controls are planned for V2 (SQL SERVER 2008 R2???)
Certain workloads may not be entirely suited – e.g. short-lived OLTP queries
No chargeback mechanism
But you can roll your own more easily using the monitoring
Enterprise Edition Only

20. What to expect in SQL Server 2008 R2
New Extensions in SQL Server Management Studio
New wizards will allow DBAs to quickly discover databases across their environment and enrol them into centralized multi-server management,
Have insight into utilization within about 15 minutes

21. What to expect in SQL Server 2008 R2
DBAs can set policies to define desired utilization thresholds across target servers or applications within a new central management point
Dashboard viewpoints provide insight into utilization and policy violations
DBAs can set policies to define desired utilization thresholds across target servers or applications within a new central management point
Dashboard viewpoints provide insight into utilization and policy violations to help identify consolidation opportunities, maximize investments and maintain healthy systems

22. Resource Management

23. Wednesday, 5 Aug – 09:00
File streaming

24. question & answer

25. Related Content
Introducing Resource Governor
Resource Governor in SQL Server
Excellent document by Aaron Bertrand, Boris Baryshnikov Go To Search for “Using the Resource Governor”

26. Resources www.microsoft.com/teched www.microsoft.com/learning
Sessions On-Demand & Community
Microsoft Certification & Training Resources
Resources for IT Professionals
Resources for Developers

27. Please complete the evaluation!

28. 11/16/ :26 AM
© 2009 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.
© 2007 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.