Hardware service times

The hardware service times which can be achieved in practice depend very much on the cache hit rate and the load on the hard disks. With a cache hit rate of 100%, the service times are around 0.1 ms with very small blocks, and 3-5 ms with very large blocks.

In the case of an overload, this range increased to approx. 1-16 ms. Above all in the case of access with small blocks (OLTP mode!), the times then increase disproportionately.