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3412424 - INSERT INTO RSTSODSREQUEST blocks many transations

Symptom

During SLT process, you observed the following INSERT SQL blocks many other SQL statements.
 "INSERT INTO RSTSODSREQUEST VALUES( ? , ? , ? )"  

  • HANA runtime dump analyzer shows the following output:

           ISSUE DETECTED        |  DESCRIPTION
           Blocked Transactions   |  There are many blocked transactions.

  • You have checked below suggestion, however your BW version is higher.
    ##2169283 - FAQ: SAP HANA Garbage Collection
    SAPKW74015 ~ SAPK-75003INSAPBW
    These tables can be moved from row store to column store.

  • Below SQLs do not return any results.
    -HANA_Locks_Transactional_LockWaits
    -HANA_Locks_Transactional_LockWaits_Hierarchy

  • HANA_SQL_StatementHash_DataCollector output contains the following information.
    ------------------------------------------
    202;SAMPLES PERCENT THREAD_TYPE THREAD_STATE   Q LOCK_NAME                                                                                                                                                  
    203;======= ======= =========== ============== = ======================================================================                                                                                     
    204;  18779   51.73 SqlExecutor Mutex Wait       traceLock_                                                                                                                                                 
    205;  17472   48.13 SqlExecutor Running          ?                                                                                                                                                          
    206;     41    0.11 SqlExecutor Semaphore Wait   ?                                                                                                                                                          
    207;      6    0.01 SqlExecutor Semaphore Wait   MemoryReclaim                                                                                                                                              
    208;      2    0.00 SqlExecutor Semaphore Wait   unnamed Semaphore                                                                                                                                          
    209;      1    0.00 SqlExecutor Mutex Wait       ?                                                                                                                                                          
    ------------------------------------------
    >>>"traceLock_" consumes more than half (51.73%) thread samples.

 "Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental."


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Environment

  • SAP HANA, platform edition 2.0
  • SAP BW 750-0019

Product

SAP HANA, platform edition 2.0

Keywords

HANA, block transaction, INSERT INTO RSTSODSREQUEST, 3427856b8ac7dabb9326cab8a2d8f296, mutex wait, traceLock_ , KBA , HAN-DB-PERF , SAP HANA Database Performance , Problem

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