Changing the number of core group coordinators

For a large cell, multiple coordinators are recommended.

Before you begin

Before you change the number of core group coordinators for a cell:

• Make sure that you are familiar with the content of the topic Core group coordinator.
• Determine the number of coordinators for the core group. A general guideline is approximately one coordinator per 20 core group members.

About this task

Change the number of core group coordinators only if:

• IBM® support instructs you to do so.
• You are directed to do so as part of the installation process for another WebSphere® product.
• The coordinator process is consuming abnormally high amounts of memory or CPU resources.
• You are scaling up the number of servers in a cell.

To change the number of core group coordinators for a core group:

1. In the administrative console, click Servers > Core Groups > Core group settings > , and select an existing core group.
2. In the Number of coordinators field, specify the number of coordinators that you want for this core group.
3. Click OK, and then click Save.
4. Click Synchronize changes with nodes and then click Save again to save your changes.
5. If you need to change the list of preferred coordinator servers, click Preferred coordinator servers and then add or delete the appropriate application servers from the list of preferred coordinator servers.
6. Click OK and then clickReview.
7. Select Synchronize changes with nodes, and then click Save.

Results

Your changes take effect immediately after synchronization completes. The members of the core group pick up these changes dynamically.