Statistics

The Common Information Model (CIM) statistics provide information about several aspects of the system performance.

Node statistics

Node statistics provides a list of node statistics.

Note: To collect statistics data, the role of the CIM user must be SecurityAdmin or Administrator. Use the command-line interface (CLI) to manage users and user groups.

Table 1. Node statistics
Property	Description
ReadHitIOs	The cumulative count of all read cache hits (reads from cache). This value represents the number of track reads received from components above that are treated by cache as a total hit on prestage or non-prestage data.
ReadIOs	The cumulative count of all reads.
TotalIOs	The cumulative count of I/Os for the object.
WriteHitIOs	The cumulative count of write cache hits (writes that went directly to cache without blocking), which represents the number of track writes received from components above, and processed in fast write mode.
WriteIOs	The cumulative count of all writes.

Backend volumes provides a list of backend volumes.

Table 2. Backend volumes
Property	Description
IOTimeCounter	This property returns accumulated time for all I/O operations.
KBytesRead	This property returns bytes read.
KBytesTransferred	This property returns bytes read/write.
KBytesWritten	Total bytes written.
ReadIOs	The cumulative count of all reads.
ReadIOTimeCounter	This property returns accumulated time for all read operations.
TotalIOs	The cumulative count of I/Os for the object (NormalReadRequests + NormalWriteRequests + SequentialReadRequests + SequentialWriteRequests). The rate at which this counter rolls over cannot be determined, because each of the individual properties that are being added can roll at different rates. If you need to know the exact point at which the counters roll, use the specific IBM extension properties and MaxCount.
WriteIOs	The cumulative count of all writes.
WriteIOTimeCounter	This property returns accumulated time for all write operations.

Volume statistics provides a list of volume statistics.

Table 3. Volume statistics
Property	Description
IOTimeCounter	This property returns accumulated time for all I/O operations.
KBytesRead	This property returns bytes read.
KBytesTransferred	This property returns bytes read/write.
KBytesWritten	This property returns bytes written.
ReadHitIOs	The cumulative count of all read cache hits (reads from cache), which represents the number of track reads received from components above that are treated by cache as a total hit on prestage or non-prestage data.
ReadIOs	The cumulative count of all reads.
ReadIOTimeCounter	This property returns accumulated time for all read operations.
TotalIOs	The cumulative count of I/Os for the object. (NormalReadRequests + NormalWriteRequests + SequentialReadRequests + SequentialWriteRequests) The rate at which this counter rolls over cannot be determined, because each of the individual properties that are being added can roll at different rates. If you need to know the exact point at which the counters roll, use the specific IBM extension properties and MaxCount.
WriteHitIOs	The cumulative count of write cache hits (writes that went directly to cache without blocking), which represents the number of track writes received from components above and processed in fast write mode.
WriteIOs	The cumulative count of all writes.
WriteIOTimeCounter	This property returns accumulated time for all write operations.

Disk statistics provides a list of disk statistics.

Table 4. Disk statistics
Property	Description
IOTimeCounter	This property returns accumulated time for all I/O operations.
KBytesRead	This property returns bytes read.
KBytesTransferred	This property returns bytes read/write.
KBytesWritten	This property returns bytes written.
ReadIOs	The cumulative count of all reads.
ReadIOTimeCounter	This property returns accumulated time for all read operations.
TotalIOs	The cumulative count of I/Os for the object.
WriteIOs	The cumulative count of all writes.
WriteIOTimeCounter	This property returns accumulated time for all write operations.