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Kirti Deshpande writes
"Also, keep SORT_AREA_RETAINED_SIZE the same as SORT_AREA_SIZE. As the
former will be used while fetching data after sort phase is completed."
I thought best advice was to make the retained size smaller (50%?) of
sort_area_size to allow initial sort memory to be released after the first
part of the sort is managed and only the merge phase of a disk sort is left
to do.
I appreciate that a lot depends on the amount of memory available and the
number of concurrent processes that may be performing sorts but surely the
aim is to free memory up as soon as possible down to the
sort_area_retained_size
Thanks
John
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Author: Hallas, John
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