Re: known problems with parallel_automatic_tuning ????

Karl,

What version of the DB? There are some problems with PQO that are very specific for version.

On 20 Aug 2000, at 19:34, karl craven wrote:

> listers,
> does anybody know of any major or in actual fact even minor problems
> with regards to the use of the parallel_automatic_tuning and
> parallel_adaptive_multi_user init.ora parameters.
>
> i have a 4 way sun 450 with a massive 2gb of ram and oracle with the
> above parameters set at true has decided that i can run at least 43
> parallel query slaves.
>
> now with the developers love for sort_area_size=3D64mb and
> sort_area_retained at the same time, you can imagine that im having
> some paging issues.
>
> eg current swith rate hangs around 1300 - 4000 ops ..... doooooh !
>
> having done this, its also decided that a large_pool_size of 64mb seems
> quite suitable. eeeem looking at v$sgastat tells me that there is 57mb
> free. vi time.
>
> basically im finding that these 2 params are causing massive problems
> for my box and i'd love any insight/thoughts into how the number of
> parallel query slaves is deduced.
>
> otherwise its back to setting the ol' min and max parameters manually.
>
> many tks
> kc
>
>
>
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Received on Tue Aug 22 2000 - 15:24:57 CDT