Microsoft KB Archive/319166

= SMS: Insufficient Sender Thread Count May Cause Slow Site Communications =

Article ID: 319166

Article Last Modified on 10/30/2006

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APPLIES TO


 * Microsoft Systems Management Server 2.0 Standard Edition

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This article was previously published under Q319166



SUMMARY
Standard Sender can create a maximum of five sender threads for communications to all sites and a maximum of three sender threads for communications to the same site by default. These default settings can lead to a backlog of scheduled job files in certain environments.



MORE INFORMATION
To configure the sender thread count:
 * 1) Start the SMS Administrator console.
 * 2) Expand Site Settings, and then expand Senders.
 * 3) Right-click the sender component you want to configure, and then click Properties.
 * 4) Click the Advanced tab, and then configure the appropriate settings in the Maximum Concurrent Sendings section.

If you reset the sender thread count, consider the following issues:
 * If the sites are connected by high speed links, the jobs are sent by the sender component quickly. If you increase the number of sender threads, you increase the network traffic that is generated by the site server.
 * If you increase the number of sender threads, the load on the site server is also increased. You may need to try a particular setting over time to find the optimum setting for a particular site.
 * A site that only communicates with its parent site does not need as many sender threads as a primary site that has many child sites. If you increase the number of threads, site server performance may not be affected.

If you enable logging at a site for the sender component, review Sender.log. If you see that all available sender threads are being used, no additional sender threads will be created. If there are a sufficient number of jobs that are to be sent to other sites, a backlog may be created until the existing sender threads can process the jobs. If all available sender threads are being used often, the backlog may grow and may cause a negative impact to the site, for example, you may have a backlog of files that are waiting to be processed.

The maximum number of sender threads that you can configure for a site is 999 for all sites and 999 for each site. It is recommended that you increase the sender threads a small number at a time until you achieve the optimum thread count. Closely monitor site server performance when you increase the sender threads so that you can adjust the thread count if the site is negatively impacted.

