OA38511: CSM DATASPACE STORAGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Application data accumulating on TCP send / receive
  queues results in the request for more than 1 CSM
  dataspace.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION: CSM created an additional 64-bit backed *
  *                      fixed storage data space and it did     *
  *                      not issue any message to inform the     *
  *                      user.                                   *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  This problem may be described as follows:
    1. TCP/IP applications were using very high amount of
       CSM 64-bit backed fixed data space storage. TCP/IP used
       CSM 64-bit backed fixed two Giga bytes data space. It
       requested more CSM buffers of 64-bit backed fixed storage.
    2. IVTSMCDS received control to create another CSM 64-bit
       backed fixed storage data space. It created CSM 64-bit
       backed fixed storage data space and it did not issue any
       message to inform the user.
  

Problem conclusion

• IVTSMCDS have been changed to issue the message IVT5593I
  if the data space number is third or higher.
  IVT5550, ISTCFCML, ISTCFCMM, ISTINCNO and ISTVTMEU have
  been changed to define new message IVT5593I.
  
  ----------------------------------------------------------
  The request for the publication change has been submitted
  as follows:
     Title: z/OS Communications Server SNA Messages
     Release: z/OS V1R11 and higher.
     Document Number: SC31-8790
  
  In the Chapter 16 - IVT messages for VTAM network operators
  
  Add a new message IVT5593I after IVT5592I as follows:
  
    IVT5593I CSM CREATED AN ADDITIONAL DATA SPACE dspname
  
  Explanation:
  CSM creates a CSM64001 data space for 64-bit backed fixed
  data-space storage and a CSM31002 data-space for 31-bit
  backed fixed data-space storage. There is not enough storage
  available in the existing data space, CSM creates another
  data space, dspname, and issues this message.
  
    dspname is the name of the recently created data space.
  
  Example:
  IVT5593I CSM CREATED AN ADDITIONAL DATA SPACE CSM64003
  
  System Action:
  Processing continues.
  
  Operator Response:
  Issue the DISPLAY CSM command without the OWNERID operand
  to determine current storage limits and usage. Issue a DISPLAY
  CSM command with OWNERID=ALL to determine how much storage is
  in use by each application. If TCP/IP is available, issue the
  D TCPIP,,STOR command to determine its storage usage. Save the
  system log and request a dump of VTAM and TCP/IP address spaces
  and CSM data spaces for problem determination. Contact the
  system programmer.
  
  Note: CSM data spaces are associated with the address space 1
        (Master Scheduler).
  
  See z/OS Communications Server: SNA Operation for more
  information on the DISPLAY CSM command.
  
  See z/OS Communications Server: IP System Administrator's
  Commands for more information on the DISPLAY TCPIP,,STOR
  command.
  
  User Response:
  Not applicable.
  
  System Programmer Response:
  Look at the Display CSM command output and determine the
  application using excessive data space storage including 64-bit
  or 31-bit backed fixed data space storage.
  See the information APARs II12657 and II12658 for VTAM and
  TCP/IP maintenance for CSM storage problems.
  
  If external trace is active, see "Analyzing storage" in z/OS
  Communications Server SNA Diagnosis Vol 1, Techniques
  and Procedures for information about analyzing storage using
  the VIT analysis tool.
  
  Refer to information on "Internal and external trace recording"
  in z/OS Communications Server: SNA Diagnosis Vol 2, FFST Dumps
  and the VIT for additional information.
  
  If TCP/IP indicates excessive CSM data space storage usage,
  then see "Steps for reviewing a storage problem" in z/OS
  Communications Server: IP Diagnosis Guide for additional
  information.
  
  Problem Determination:
  Not applicable.
  
  Source:
  z/OS Communications Server CSM
  
  Module:
  Not applicable.
  
  Routing code: 2
  
  Descriptor code: 6
  
  Automation:
  Automation could be written to complete the following
  operations when message IVT5593I is detected:
    1. Issue the DISPLAY CSM command without the OWNERID operand
    2. Issue the DISPLAY CSM command with OWNERID=ALL
    3. Issue the D TCPIP,,STOR command
    4. Request a dump
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UA64250 UA64251 UA64252

Modules/Macros

• ISTCFCML ISTCFCMM ISTINCNO ISTVTMEU IVTSMCDS
  IVT5550
  

Fix information

• Fixed component name

  VTAM V4 MVS/ESA

• Fixed component ID

  569511701

Applicable component levels

• R1B0 PSY UA64250

     UP12/04/21 P F204

• R1C0 PSY UA64251

     UP12/04/21 P F204

• R1D0 PSY UA64252

     UP12/04/21 P F204

Fix is available

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