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