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2524578 - Standstill scenario caused by lack of EG (extended global memory)


  • The affected instance suffers from an apparent standstill situation.
  • Most actions will just hang and new users cannot logon to the application server.
  • The following warning entry is noticed at work process trace files:

 *** WARNING => MtxLock xxYYxxYYxxYY EMADM owner=<wp number> deadlock ? [mtxxx.c 2574]

  • By extracting the C-STACK from the work process number displayed as the mutex holder (above), the following (or similar) is seen:


  • You also notice that a few processes seem to be waiting for semaphore 39, through DPmon output or through the work process table (Transaction SM50).



  • SAP Netweaver release independent


SAP NetWeaver all versions


semaphore 36, mutex, freeze, hanging situation, extended global, SAP memory , KBA , BC-CST-DP , Dispatcher, Task Handler , BC-CST-MM , Memory Management , Problem

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