Monitoring storage utilization

Storage is a resource that many users monitor very closely to determine their average utilization. You can monitor storage by using storage monitors; by manually issuing TCPIP and CSM display commands; or by using NetView® CLISTs that are triggered at specific time intervals. Automatically issuing commands to your system log at periodic intervals is the most efficient way to monitor your storage utilization.

Use this log output to establish a storage utilization history. Knowing how much common, private, or CSM storage you typically use can be helpful when trying to resolve problems where TCP/IP storage utilization is increasing (also referred to as a storage creep) or you receive an abend related to an out of storage condition.

Monitor TCP/IP common and private storage utilization by issuing the Display TCPIP,,STOR console command:

For example:

     d tcpip,,stor
     TCPIP STORAGE
     TCPCS    STORAGE  CURRENT  MAXIMUM    LIMIT
     TCPCS    ECSA         14M      28M     120M
     TCPCS    POOL         52M      62M  NOLIMIT
     DISPLAY TCPIP STOR COMPLETED SUCCESSFULLY

     or

     d tcpip,tcpip2,stor
     TCPIP STORAGE
     TCPIP2   STORAGE  CURRENT  MAXIMUM    LIMIT
     TCPIP2   ECSA      45654K   56823K  204800K
     TCPIP2   POOL     124634K  143743K  524288K
     DISPLAY TCPIP STOR COMPLETED SUCCESSFULLY

For additional information regarding the Display TCPIP,,STOR command, see z/OS Communications Server: IP System Administrator's Commands.

TCP/IP's CSM storage utilization is not included in the TCP/IP display. TCP/IP's CSM storage utilization can be monitored by issuing the following console commands.

To display information about storage managed and used by CSM for all owners, issue the following command:

d net,csm,ownerid=all

To display information about CSM utilization for TCP/IP:

d net,csm,ownerid=TCPIP asid

For example:

   d net,csm,ownerid=01f6

     IVT5508I DISPLAY ACCEPTED
     IVT5549I PROCESSING DISPLAY CSM COMMAND - OWNERID SPECIFIED
     IVT5530I BUFFER BUFFER
     IVT5551I SIZE   SOURCE             STORAGE ALLOCATED TO OWNER
     IVT5532I ------------------------------------------------------
     IVT5553I    4K  ECSA                            256K
     IVT5554I TOTAL  ECSA                            256K
     IVT5532I ------------------------------------------------------
     IVT5553I    4K  DATA SPACE 64                   128K
     IVT5554I TOTAL  DATA SPACE 64                   128K
     IVT5532I ------------------------------------------------------
     IVT5554I TOTAL  DATA SPACE                      128K
     IVT5532I ------------------------------------------------------
     IVT5556I TOTAL  FOR OWNERID                     384K
     IVT5557I OWNERID: ASID = 01F6  JOBNAME = TCPIP
     IVT5599I END

For additional information about the command, see z/OS Communications Server: SNA Operation.