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Configure the SAP HANA file I/O layer with certain parameters to optimize file I/Os for a given storage solution and file system. The Linux XFS file system is used on all storage volumes for the SAP HANA persistence.
For SAP HANA 1.0 installations, run the SAP HANA hdbparam command as <sid>adm in the Linux shell:
su - <sid>adm
hdbparam –p # lists current parameter setting
hdbparam –-paramset fileio [DATA].max_parallel_io_requests=128
hdbparam –-paramset fileio [LOG].max_parallel_io_requests=128
hdbparam –-paramset fileio [DATA].max_submit_batch_size=128
hdbparam –-paramset fileio [LOG]. max_submit_batch_size=128
For SAP HANA 2.0 installations, use either hdbsql or the SQL function in SAP HANA Studio or cockpit and run the following SQL commands:
ALTER SYSTEM ALTER CONFIGURATION ('global.ini', 'SYSTEM') SET ('fileio', 'max_parallel_io_requests[Data]') = '128' WITH RECONFIGURE;
ALTER SYSTEM ALTER CONFIGURATION ('global.ini', 'SYSTEM') SET ('fileio', 'max_parallel_io_requests[Log]') = '128' WITH RECONFIGURE;
ALTER SYSTEM ALTER CONFIGURATION ('global.ini', 'SYSTEM') SET ('fileio','max_submit_batch_size[DATA]') = '128' WITH RECONFIGURE;
ALTER SYSTEM ALTER CONFIGURATION ('global.ini', 'SYSTEM') SET ('fileio','max_submit_batch_size[LOG]') = '128' WITH RECONFIGURE;
For more information, see SAP Note 2399079: Elimination of hdbparam in HANA 2 (access requires an SAP username and password).