Re: performance issue on select count(*)

The symptom suggests caching is a big factor here - most likely block-buffers.

Contrary to ?current? popular beliefs, BCHR is still a very relevant performance indicator - either being very high, or being too low - both of which gives a good indication of something that needs to be looked at.

> I would be interested to know if there is a way to speed up the initial
> execution or how to diagnose what the delay was. It does not seems right
> that there is such a big difference in elapsed time between the initial
and
> subsequent execution.

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Author: Binley Lim
  INET: Binley.Lim_at_xtra.co.nz

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