RE: tunning an index built

> Hi all. Thanks to all who replied. I'm still trying
> to speed the things up and wondering whether someone
> can explain what is "paging to file system" is
> referring to? Does this indicate that I don't have
> enough memory? Is it related to reads? Anything else?

Yes it does relate to a lack of memory. I'd hazard a guess that you are seeing what kirti was referring to, potentially up to 32x200Mb 6.4gb ram used for the sorts. (Actually I'd expect the usage to be less than that but if you are setting SAS at 200m and degree 32 that is what you could be using.)

I'd ask a couple of things though.

First how often do you build this index. A one off hit of 55min doesn't seem horrible to me. If you are rebuilding daily this is probably not necessary.
Second I'm assuming that this is 9i (because you refer to db_cache) and you are in a test environment. If both of these are the case you could see if you do better by abandoning SAS and SARS and instead setting PGA_AGGREGATE_TARGET to some large value (say 500m).

Cheers

Niall

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Author: Niall Litchfield
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