Solution : https://service.sap.com/sap/support/notes/1173395 (SAP Service marketplace login required)
Summary :
This SAP Note addresses common queries about SAP MaxDB configuration, detailing limits on database size and sessions, recommending 64-bit platforms, and providing guidance on data volume configuration. For optimal I/O performance, it suggests distributing data volumes across available I/O channels and maintaining equal sizes among volumes. It covers the use of raw devices versus file-based volumes on UNIX, the latter being preferred on Linux for performance reasons. The note also highlights the absence of session limits, set by the MaxUserTask parameter, and provides links to more in-depth documentation sources for detailed database configuration.
Key words :
fewer time-consuming hard disk accesses, sap maxdb <version> library -> glossaryunder, sap maxdb/livecache database transfers, low/med/high queues, maxdb/livecache kernel parameters, maxdb/livecache heap management, dynamically add additional cpus, sap maxdb standard layout, sap maxdb version lower, sap maxdb database parameters
Related Notes :
| 1459538 | Configuration of MaxCPUs in virtual environments |
| 1139904 | FAQ: MaxDB/liveCache kernel parameters |
| 1128916 | FAQ: MaxDB/liveCache heap management |
| 1013441 | Upgrade required: Advantages for MaxDB on 64-bit platforms |
| 993848 | Direct I/O mount options for liveCache/MaxDB |
| 936058 | FAQ: SAP MaxDB Runtime Environment |
| 912905 | FAQ: Storage systems used with MaxDB |
| 869267 | FAQ: SAP MaxDB log area |
| 822239 | FAQ: SAP MaxDB Interfaces |
| 757914 | -9807 Task limit |
| 719652 | Setting initial parameters for liveCache 7.5, 7.6, 7.7 |