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3127676 - DSI Schedule hang with large xact handling and parallel DSI enabled - SRS

Symptom

  • DSI stopped processing and the Replication Server hung
  • The parallel_dsi is set to "on"
  • SRS errorlog has the following messages repeatedly:
      WARNING #7038 DSI(109 RDS.RDB) - ...WARNING: Memory usage is above 80 percent. Increase 'memory_limit' or reduce cache sizes to avoid repserver threads from sleeping due to lack of memory.
      WARNING #7043 DSI(109 RDS.RDB) - ...WARNING: Module 'DSIS' run into vertical memory control due to memory usage above threshold(20 percent).
      WARNING #7039 DSI(107 RDS.RDB) - ...WARNING CANCEL: Memory usage is below 80 percent.
      WARNING #7044 DSI EXEC(109(3) RDS.RDB) - ...WARNING CANCEL: Module 'DSIS' cancel vertical memory control.    
  • Admin who and who,sqt show DSI with "Controlling Mem" or "Flow Controlling"
    admin who                                                                 
    63 DSI EXEC        Awaiting Command     109(1) RDS.RDB
    64 DSI EXEC        Awaiting Command     109(2) RDS.RDB
    65 DSI EXEC        Awaiting Command     109(3) RDS.RDB
    66 DSI EXEC        Awaiting Command     109(4) RDS.RDB
    67 DSI EXEC        Awaiting Command     109(5) RDS.RDB
    30 DSI             Controlling Mem      109 RDS.RDB

    admin who,sqt:                                                       
    Spid State                Info                           First rans                      
    ---- -------------------- ---------------------------------------------------------------                                                                 
     30 Controlling Mem      109 RDS.RDB      st:O,cmds:10058,qid:87445:33:321

  • In some cases below information will print out in the SRS log:
     WARNING #24041 dALARM( ) - generic/sqt/sqtint.c(9704)  A timeout has occurred while a large transaction was waiting for the next message to be read.


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Environment

SAP Replication Server 16.0

Product

SAP Replication Server 16.0

Keywords

Controlling Mem, CR 822121,  CR822121,  822121, DSI schedule, WARNING #7043, WARNING #7038 , KBA , BC-SYB-REP , Sybase Replication Server (standalone) , BC-SYB-REP-SAP , Replication with SAP Suite / SAP BW , Known Error

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