This summary has the following information:

• What structures are in use
• Whether they are list, lock, or cache structures
• The space used
• The number of requests

This report shows you, by structure, the number of requests (both synchronous and asynchronous), the service time, and the number of requests that were delayed. The following key indicators in the structure-activity report that could alert you to configuration problems:

• More directory entries than data entries
• High number of directory reclaims
• High number of cross-invalidations
• Synchronous requests changed to asynchronous
• Low number of successful reads compared to writes

Key indicators in this report follow:

• High degree of subchannels busy
• Number of subchannels used less than the number defined in the IOCDS