2617033 - SUM comments out PHYS_MEMSIZE; ERROR => shmget (12: Not enough space) | SAP Knowledge Base Article

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2617033 - SUM comments out PHYS_MEMSIZE; ERROR => shmget (12: Not enough space)


  • While performing an upgrade using Software Update Manager (SUM) on a system with multiple SIDs, an error occurs during the phase MAIN_SWITCH/STARTSAP_TRANS.
  • The PHYS_MEMSIZE parameter is set to a specific value to limit each SID from using up all of the system's resources.
  • The dispatcher process fails to start, the error reported by SUM has an output similar to:
    • In SAPup.ECO:
      • 2 name: disp+work
        2 description: Dispatcher
        2 dispstatus: YELLOW
        2 textstatus: Request handling without progress
        2 starttime: <time>
        2 elapsedtime: 0:04:59
        2 pid: <pid>
    • In dev_wN logs (N being a number), you can see a similar error message:

      • I *** ERROR => shmget(10006,80530636800,2016) (12: Not enough space) [shmux.c 1529]
    • You also see in the SUM log MODPROF_TRANS.LOG:

      • 2 ETQ399 Commenting out key 'PHYS_MEMSIZE' value '2048'.
    • Checking the central instance profile, you see that the PHYS_MEMSIZE parameter is commented out by SUM:
      • # *** TEMPORARY 740 CHANGE ***
        #PHYS_MEMSIZE = 2048
        # *** TEMPORARY 740 CHANGE ***
  • Why is SUM commenting out this value?



  • SAP NetWeaver
  • Kernel >= 740


KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem

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