Is there a cause for concern when storage statistics indicated failed requests.

Document ID : KB000055119
Last Modified Date : 14/02/2018
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Description:

Storage Statistics are displayed using the D STOR and D STORXA commands.

When there are non-zero numbers in the "Failed" column, should there be any cause for concern or worry?

Solution:

A failed request indicates that there was no space left in the slot pool that was requested so the request is "moved" to a larger slot pool. So it actually is not a failure as much as a sign that the particular pool is getting requests that need to be satisfied in a different pool.

This number is most important to CA Support in debugging a U0032 ABEND since it will point to the problem area of the storage slots rather quickly.

In this example, Slots 10, 11, & 12 (below the line) show a number of failed requests in the "Failed" column. This is likely related to the Max Use of 100% that has been logged for these same slots. However since the current use for each is 0% and as long as there is no ABEND situation, these failed requests are no cause for alarm.

RDCTPX   - GM2  ************* TPX Operator      **********************       
TEN0217                                                                      
                               Storage Statistics (Below 16M line)           
Open ACBs:  0103     Total ACBs:  4829   Terminals: 0016  Applications: 0270 
DSA  Bytes: 04718592 Current Use: 013 %  High Use:  017 % Free Areas:0005    
Slot Bytes: 01568768 Current Use: 000 %  High Use:  066 % Overflows:00162    
                                                                             
Slot   Size  * Count  =  Bytes     Curr.Use   Max.Use   Failed  Requests     
 01    00008   2048      16384       000 %     002 %    0       187739       
 02    00016   1024      16384       000 %     024 %    0       3477813      
 03    00032   1024      32768       000 %     003 %    0       218542       
 04    00064   768       49152       007 %     009 %    0       106916       
 05    00128   384       49152       003 %     014 %    0       496536       
 06    00256   752       192512      000 %     002 %    0       4214641      
 07    00512   64        32768       001 %     065 %    0       169996       
 08    01024   48        49152       000 %     027 %    0       166688       
 09    02048   80        163840      000 %     056 %    0       1489297      
 10    04096   120       491520      000 %     100 %    323     4451498      
 11    08192   48        393216      000 %     100 %    202     870866       
 12    10240   8         81920       000 %     100 %    162     46           
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