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Home -> Community -> Usenet -> c.d.o.misc -> Re: Simple Oracle Query Taking Too Long
joel garry wrote:
> DA Morgan wrote:
>> joel garry wrote: >>> DA Morgan wrote: >>>> Frank van Bortel wrote: >>>>> DA Morgan schreef: >>>>>> That is about as horrible a definition as I can imagine. I can't think >>>>>> of a single justification for either the 64K extents or a pctincrease >>>>>> that is anything except 1. >>>>>> >>>>> And what would be wrong with 64kB extents? >>>>> >>>>> I'm off to the Chimay :D Sayonara! >>>> The problem with 64K extents is one Howard Rogers ranted about many >>>> years ago here at c.d.o. The fact that it doesn't match any operating >>>> system. Or at least not Windows or any variant of UNIX or Linux. >>>> >>> Block size isn't extents, is it? >> You are correct I wasn't reading closely though I suspect that may still >> be what the OP intended. Either way that too is a bad idea. If a table >> is going to grow to 1GB ... do you really want to do this 64K at a time? >> I sure don't even without dictionary managed tablespaces.
I agree with Howard ... but it isn't about the number of extents to which I refer. Rather why update that bitmap a zillion times when a few will do. Keep in mind that while that extent is being added, update bitmap, update seg$, update a bunch of view, you are gaining nothing but wait.
-- Daniel Morgan Puget Sound Oracle Users GroupReceived on Fri Sep 08 2006 - 20:28:18 CDT