Symptom
- It has been observed that the memory allocation for Pool/RowEngine/QueryExecution/SearchAlloc heap is continuously increasing.
- The result of SQL Statement "HANA_Memory_ContextMemory" (1969700) (CATEGORY='%Pool/RowEngine/QueryExecution/SearchAlloc' , DB_USER='%', AGGREGATE_BY='CONN_ID, DB_USER') shows that USED_GB are high for some connections.
Example result:
HOST PORT CATEGORY CATEGORY_CLASS NUM_ENTRIES CONN_ID THREAD_ID STATEMENT_ID STATEMENT_HASH WORKLOAD_CLASS USED_GB ALLOC_GB ALLOC_MB_PER_S LIMIT_GB DB_USER CLIENT_HOST CLIENT_PID COMPONENT STATEMENT_STRING 1 any any %Pool/RowEngine/QueryExecution/SearchAlloc any 225071 352843 any any any any 30.09 281.36 0.34 any USER1 any any any any 2 any any %Pool/RowEngine/QueryExecution/SearchAlloc any 12800 311472 any any any any 17.33 237.34 0.71 any USER1 any any any any 3 any any %Pool/RowEngine/QueryExecution/SearchAlloc any 2 258181 any any any any 0 9.97 4.31 any SYSTEM any any any any 4 any any %Pool/RowEngine/QueryExecution/SearchAlloc any 27 299879 any any any any 0 70.46 0.66 any USER1 any any any any 5 any any %Pool/RowEngine/QueryExecution/SearchAlloc any 27 247953 any any any any 0 22.45 0.99 any USER1 any any any any - For some situations, there might a few connections each consuming a little memory while all those connections add together consuming a lot of memory.
"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
Product
SAP HANA 1.0, platform edition ; SAP HANA, platform edition 2.0
Keywords
M_CONTEXT_MEMORY, Pool/RowEngine/QueryExecution/SearchAlloc, M_CONNECTIONS, dbs/hdb/stmt_cache_size , KBA , HAN-DB-ENG , SAP HANA DB Engines , Problem
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