Pool graphs

Pool Utilization

Device Pool Utilization

Use to show utilization percentage for a device across the selected intervals.

Response Time

Device Pool Response Time

Use to show response time in milliseconds for a device or device class (MVS Summary) across the selected intervals.

Service Time

Device Pool Service Time

Use to show service time in milliseconds for a device across the selected intervals.

Queue Time

Device Pool Queue Time

Use to show queue time in milliseconds for a device across the selected intervals.

I/O Rate

Device Pool I/O Rate

Use to show the I/O rate in I/Os per second for a device or device class (MVS Summary) across the selected intervals.

Cache Information

Device Cache Information

Use to show Write Hit, Read Hit, and Read Proportion ratios for a cached device across the selected intervals.

Pool Hierarchy

Pool Hierarchy

Use to show metrics for each device in a storage group or pool across the selected intervals. The graph can show the following performance measures:

• Device utilization percentage (Device %)
• I/O rate per second (I/O Rate)
• Average response time per I/O request (Resp Time)
• DB Delay time (DB Delay)
• Service time (Serv Time)
• Connect time (Conn Time)
• Disconnect time (Disconn)
• Degradation percentage (Degrade %)
• Percentage of I/Os that are reads (Read %)
• Percentage of read cache hits (Read Hit%)
• Percentage of write cache hits (Write Hit%)
• Amount of free space in thousands of tracks (Free Trk(K))
• Number of devices (#devices)