Change the number of core group coordinators

Overview

For a large cell, multiple coordinators are recommended.

Before changing the number of core group coordinators for a cell, determine the number of coordinators for the core group. A general guideline is approximately one coordinator per 20 core group members.

Change the number of core group coordinators only if:

• IBM support instructs you to do so.

• We 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.

• We are scaling up the number of servers in a cell.

Change the number of core group coordinators for a core group

1. In the administrative console, click...
   Servers | Core Groups | Core group settings | existing core group

2. In the Number of coordinators field, specify the number of coordinators that we want for this core group.

3. Click OK> Save.

4. Click Synchronize changes with nodes and then click Save again to save the changes.

5. 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 click Review.

7. Select Synchronize changes with nodes> Save.

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

Subtopics

• Core group settings
  
• Core group custom properties
  

Related:

Core groups (high availability domains)

Core group coordinator

Configure core group preferred coordinators