Yann Michel wrote:
>
> To my question: I found the parameter "stats_reset_on_server_start"
> which is set to true by default. Why did you choose this (and not false)
> and what are the impacts of changeing it to false? I mean, as long as I
> understood it, each query or statements generates some statistic data
> which is used by the optimizer (or anything equal) later on. So in my
> oppinion, wouldn't it be better so set this parameter to false and to
> enable a kind of a "startup reset_stats" option?
This is administrator statistics (e.g. number of disk blocks read from
this index) not planner statistics. You're right - it would be foolish
to throw away planner stats.
--
Richard Huxton
Archonet Ltd