I wonder, this cannot be the case if log entries were written fully synchronous. If the Log writer UKT would flush it's log queue on every COMMIT, the performance could be at max. :
7.200 RPM / 60 = 120 records / sec
I don't understand that calculation, could you expalin it a bit?
That is: Is the Log writer laszy by default? E.g. does it wait until log pages are full to flush them to disk? Or is this a Win32 specifica where Windows plainly ignores requests for syncing file writes? How does SAP DB force a sync on Win32?
Perhaps SAPDB does a sync, and Windows flushes it's buffers. That might only mean, that the data is within the harddisk's cache-memory.
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