Volume Service

This panel shows a breakdown of volume service time by the various IOS service-time components. Use this information to analyze service times for a single DASD volume.


________________ ZOJVR    VTM     O2       V540.#P SE12 11/06/13 10:29:02   2  
>   Help PF1                                                      Back PF3      
>                                                                               
>         OBJECT ANALYSIS:  Enter a selection letter on the top line.           
>                                                                               
> A-VOLUME DB ACTIVITY                                       *-VOLUME SERVICE   
=============================================================================== 
>                              VOLUME SERVICE                                   
 OJVR                                                                           
+ Interval Time   = 00:05:00                      Interval Elapsed   = 00:04:18 
+ Volume/Unit     = PMOSDB/4C2F                   Total I/O Rate/sec =       .0 
+ Device Type     = 3390                          DB2   I/O Rate/sec =       .0 
+                                                                               
+         Vol Serv =  Pending  +  Connect  +  Disconnect                        
+         --------    -------     -------     ----------                        
+               .3         .1          .2             .0                        
===============================================================================

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Fields

Interval Time: The collection interval currently in use by the object analysis collector. At the end of this time interval, the collector resets its collection statistics.
Interval Elapsed: The elapsed time within the current collection interval. It is the period of time for which the displayed information is applicable.
Volume/Unit: The name and address of the volume.
Total I/O Rate/sec: The total number of I/Os per second for the volume. This value is from an MVS perspective. If the volume is shared by multiple MVS systems, this value might not reflect all I/O activity to the volume.
Device Type: The device type of the volume displayed.
Db2 I/O Rate/sec: The total number of I/Os per second (for the volume) originating from the Db2 subsystem being monitored. This is a subset of total I/Os per second if I/O to the volume is also occurring from address spaces other than the DB2 subsystem being monitored.
Vol Serv: The average service time for the volume since the beginning of the collection interval. This field is the sum of the average IOS pending time, the average IOS connect time, and the average IOS disconnect time for the volume. It does not include IOS queue time.
Pending: The average IOS pending time for the volume. This is a subset of total volume service time.
Connect: The average IOS connect time for the volume. This is a subset of total volume service time.
Disconnect: The average IOS disconnect time for the volume. This is a subset of total volume service time.