Load balancing is a feature of the SAS Object Spawner that balances workloads across SAS server processes and across server machines. If you need to troubleshoot load balancing problems or need to get more information about how requests are being distributed, it is helpful to turn on additional logging.

Steps to enable Load Balancing logging for the SAS Object Spawner

1. Modify the SAS Object Spawner's logconfig.xml file.

   This file should be located at: .../Lev1/ObjectSpawner/logconfig.xml

2. Add the following logger to the logconfig.xml file:

    <!-- Monitor Load Balancing - IOM Load Balancing message logger -->
    <logger name="IOM.LoadBalancing">
       <level value="Trace"/>
    </logger>
   

Add the above logger under the following logger:

 <logger name="IOM">
    <level value="Info" /> 
 </logger>

3. Restart your SAS Object Spawner to activate the change.

4. The SAS Object Spawner log file will contain COST messages that provide information about Load Balancing.

Steps to turn on more logging for the SAS^® Stored Process Server

1. SAS Usage Note 34114 provides information about Creating a detailed SAS^® Stored Process Server log.
   
2. The SAS Stored Process Server log file will contain COST messages that provide information about Load Balancing.

For more information about turning on additional logging for the SAS Object Spawner refer to SAS Usage Note 34893. For more information about Load Balancing, refer to: Overview of Load Balancing.

Operating System and Release Information

Product Family	Product	System	SAS Release
			Reported	Fixed*
SAS System	SAS Integration Technologies	Microsoft Windows Server 2003 Standard Edition	9.2 TS2M0
		Microsoft Windows Server 2003 Enterprise Edition	9.2 TS2M0
		Microsoft Windows Server 2003 Datacenter Edition	9.2 TS2M0
		Microsoft® Windows® for x64	9.2 TS2M0
		Microsoft Windows XP 64-bit Edition	9.2 TS2M0
		Microsoft Windows Server 2003 Enterprise 64-bit Edition	9.2 TS2M0
		Microsoft Windows Server 2003 Datacenter 64-bit Edition	9.2 TS2M0
		Microsoft® Windows® for 64-Bit Itanium-based Systems	9.2 TS2M0
		z/OS	9.2 TS2M0
		Microsoft Windows Server 2003 for x64	9.2 TS2M0
		Microsoft Windows Server 2008 for x64	9.2 TS2M0
		Microsoft Windows XP Professional	9.2 TS2M0
		Windows Vista	9.2 TS2M0
		Windows Vista for x64	9.2 TS2M0
		64-bit Enabled AIX	9.2 TS2M0
		64-bit Enabled HP-UX	9.2 TS2M0
		64-bit Enabled Solaris	9.2 TS2M0
		HP-UX IPF	9.2 TS2M0
		Linux	9.2 TS2M0
		Linux for x64	9.2 TS2M0
		Solaris for x64	9.2 TS2M0

* For software releases that are not yet generally available, the Fixed Release is the software release in which the problem is planned to be fixed.

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If you need to trobuleshoot load balancing problems or need to get more information about how requests are being distributed, it is helpful to turn on more logging.

Type:	Usage Note
Priority:

Date Modified:	2011-06-29 16:40:21
Date Created:	2011-06-10 17:17:30