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2569150 - Signal 11 at ptn_pdes_discard_all - SAP ASE


  • ASE errorlog reports an "infected with signal 11" error in the module ptn_pdes_discard_all() or a storage access violation together with a stack trace:

    • on Unix/Linux:

      Current process (...) infected with signal 11 (SIGSEGV)
      Address 0x0x0000000001b7df3a (ptn_pdes_discard_all+0xa)

    • on Windows:

      Adaptive Server Enterprise system exception (0xc0000005) generated by a storage access violation.
  • The stack trace includes the following modules:


  Note:  Samples of complete stack traces are available under Attachments.

  • The signal 11 error is preceded by the message :

    Increase the config parameter 'number of open indexes' to avoid descriptor reuse. Reuse may result in performance degradation.

  • This may be followed by Error 8424 on ASE systems running custom, non-SAP applications:

Error: 8424, Severity: 17, State: 1
Cannot find an available index descriptor for an index. Increase the value of 'number of open indexes'. If sp_configure fails due to lack of index descriptors, edit the configuration file and restart the server.



  • SAP Adaptive Server Enterprise (ASE) 16.0
  • SAP Adaptive Server Enterprise (ASE) 16.0 fo Business Suite


SAP Adaptive Server Enterprise 16.0


"open indexes", SYBASE, CR805775, CR#805775, CR805775, SEGV, segmentation, storage, access, violation, fault, segfault, kisignal, stacktrace,  registers, metadata, 822205, CR822205, CR#822205, des, scavenge , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , BC-DB-SYB , Business Suite on Adaptive Server Enterprise , Bug Filed

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