Why can it be that Command "D STOR" shows Overflows but no single Slot has any failure?
It might happen that there is a difference in the Output of Command D STOR - the number of Overflows is a non-zero number but there is no single Failed Slot Request like in this example:
APU2ETPX - ****************** TPX Operator ************************* TEN0217
Storage Statistics (Below 16M line)
Open ACBs: 0342 Total ACBs: 1665 Terminals: 0179 Applications: 0702
DSA Bytes: 04440064 Current Use: 005 % High Use: 006 % Free Areas: 0006
Slot Bytes: 01441600 Current Use: 000 % High Use: 002 % Overflows: 03541
Slot Size * Count = Bytes Curr.Use Max.Use Failed Requests
01 00016 1024 16384 000 % 000 % 0 169363
02 00024 680 16320 000 % 000 % 0 223109
03 00032 1920 61440 000 % 006 % 0 22498
04 00064 2560 163840 001 % 001 % 0 40436
05 00072 1080 77760 000 % 000 % 0 4311
06 00104 2008 208832 000 % 000 % 0 69783
07 00128 928 118784 000 % 000 % 0 15917
08 00512 928 475136 000 % 000 % 0 870202
09 01024 56 57344 000 % 008 % 0 37530
10 02048 40 81920 000 % 010 % 0 247378
11 04096 8 32768 000 % 037 % 0 46869
12 08192 16 131072 000 % 006 % 0 4069
***************************** BOTTOM OF DATA **************************
This discrepancy can occurr if TPX need a Slot of a size even Slot Pool 12 cannot deliver. If you for example define 8192 as the largest Slotsize but the MAIL file has a size of 10240 then TPX need to take the 10240 bytes needed from the DSA instead of the Slot Pool. This is not a Failure to get a Slot of Pool 12 but it is a failure to get any Slot. So TPX does mark this request as an Overflow and displays it in field "Overflows:". The above display shows that Slot 12 is not large enough to fulfil Requests for TPXMAIL. Solution is to enlarge this Slot in the second panel of SMRT and restart TPX. Then this behaviour will no longer appear.
You may check the size of your TPX flies in the JES-Log: Messages TPXL0704 show the length of the Records at the end in Parameter B=:
TPXL0704 11/13/16.318 03:01:46.51 OPEN successful for VSAM DD VIEW B=08192
TPXL0704 11/13/16.318 03:01:46.53 OPEN successful for VSAM DD NOTES B=04096
TPXL0704 11/13/16.318 03:01:46.53 OPEN successful for VSAM DD ADMIN1 B=08192
TPXL0704 11/13/16.318 03:01:46.53 OPEN successful for VSAM DD MAIL B=10240
TPXL0704 11/13/16.318 03:01:46.55 OPEN successful for VSAM DD ADMIN2 B=02048