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Foglight Agent Manager 7.3.0 - Foglight Agent Manager Guide

Configuring the embedded Agent Manager Installing external Agent Managers Configuring the Agent Manager Advanced system configuration and troubleshooting
Configuring Windows Management Instrumentation (WMI) Configuring Windows Remote Management (WinRM) UNIX- and Linux-specific configuration
Monitoring the Agent Manager performance Deploying the Agent Manager to large-scale environments

WMI and Quota Violation error

In some cases, when the agent queries WMI to collect metrics on the monitored host, the host’s performance may be affected. When this occurs, the agent log includes the message: Quota violation [SWbemServicesEx]. This error stems from WMI rather than the agent, and has been identified by Microsoft® as a known issue in Windows® Server 2003.

To correct this error:
1
Ensure that the following hotfix, available from Microsoft in KB 828653, is applied:
http://support.microsoft.com/kb/828653
2
Restart the WMI service on the monitored host.

Known WMI issues in Windows Server 2008

Microsoft® has identified a number of known issues with WMI services in Windows® Server 2008. The following issues may occur:

•
The database agent OS validation or collection has errors, even when the OS credentials are correct.
•
The WMI reports incorrect data from the performance classes.
•
Remotely accessing WMI causes memory leaks in Windows Server 2008.
•
The WMI reports are unstable.
•
In SQL Server 2008, the perfmon counters do not appear under WMI because they do not exist.
To resolve these issues:
1
Using the same OS credentials as the agent uses, run perfmon /wmi on the monitored host.
2
Install the hotfixes available in the following Microsoft support articles on the Windows 2008 machine:
•
http://support.microsoft.com/?id=961435
•
http://support.microsoft.com/?id=977357
•
http://support.microsoft.com/?id=970520
3
In SQL Server 2008 on Windows Server 2008, if the perfmon counters are missing from WMI, install the following hotfixes:
•
To install SQL Server 2008 Service Pack 1, go to http://support.microsoft.com/kb/968382.
•
To install cumulative update package 3 for SQL Server 2008 Service Pack 1, go to http://support.microsoft.com/kb/971491.

Tuning WMI connections

The following parameters can be used to fine tune the Windows Management Instrumentation (WMI) connections made by Foglight® agents. You can set these parameters for Foglight Agent Manager either in the baseline.jvmargs.config file as vmparameter options, or specify them directly as jvm options when starting up Foglight Agent Manager via command line. The values used for these parameters vary from environment to environment and so should be used as reference only.

•
Max Active Connections: Defines the number of simultaneous outbound connections that can be made by all agents running on a particular instance of Foglight Agent Manager. The default value is 100.
Sample: -Dcom.quest.connection.regulator.maxActiveConnectionsCap=500
•
Expire connection based on no. of executions: Defines the number of executions that can be made by a connection before forcibly closing it. The default value is 50.
Sample: -Dquest.debug.poolable.wmi.time.to.live.executions=200
•
Timeout by elapsed time: Defines the time (in milliseconds) after which a connection is expired. The default value is 600000 (10 mins).
Sample: -Dquest.debug.poolable.wmi.time.to.live.timeout.millis=900000

Modifying registry key ownership on Windows Server 2008 R2

Configuring the agent to connect to the remote Windows® Management Instrumentation (WMI) and WinShell components on Windows Server 2008 R2 systems requires certain modifications to the registry keys. In some situations, these registry keys may be owned by TrustedInstaller instead of the Administrators group, which prevents modifications from being made even by Administrator accounts.

 
* 
TIP: It is recommended that you create a backup copy of the Windows Registry that you can revert to prior to making any changes.
To modify the registry key ownership:
1
Using the registry editor, locate the registry key that you need to modify.
2
Right-click the registry key and click Permissions.
3
On the Permissions dialog box, click Advanced.
4
On the Advanced Security Settings dialog box, open the Owner tab.
5
In the Change owner to list, select the Administrators group.
 
* 
IMPORTANT: An error indicating insufficient permissions may appear. To resolve, a user with the administrative account intended to use for profiling can change the ownership of the keys to that administrative account, and then set the permissions to Full on the appropriate registry keys.
6
Click OK.
Ownership of the registry key is assigned to the Administrators group, allowing any member of that group to modify the key’s permissions. For more information about required registry changes, see Configuring registry settings for Windows Server 2008 R2 and Windows 7.
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