IGW048A

Explanation
The PDSE monitor has detected that the BMF or IMF
LRU processing has stalled. When the BMF or IMF LRU stalls, buffers
are  not reused and the amount virtual storage used by the PDSE address
space will grow. Over time this can have an affect on system performance. 
In
the message text:sssssss
identifies the address space with the problem: SMSPDSE or SMSPDSE1. 
mm/dd/yyyy hh:mm:ss.tttttt
The date and time when the BMR or IMF LRU last successfully completed
its processing.
xxxxx
The buffer space used in MB.

System action
IGW048A is issued as a delete operator message
to the console to indicate the detection of a possible PDSE processing
problem.

Operator response
None.

System programmer response
Issue V SMS,PDSE,ANALYSIS command
to determine what may be wrong with the PDSE(s). For detail  about
this command and what actions to take, see z/OS DFSMSdfp Diagnosis.
If the problem cannot be corrected and the amount of storage used
affects the system operation,  you may want to schedule a restart
of the  SMSPDSE1 address space.

Source
DFSMSdfp

Module
IGWLHAT1