Re: Auto Extend

Good point John for large databases.

We were using 20 gig files in a Lawson system on AIX. Great for DW.

Jared

On Friday 01 June 2001 15:22, John Kanagaraj wrote:
> >Neither large files nor small files are evil. As with all
> >things, fit the
> >solution to the problem.
> >Small files can leave you with lots of separate datafiles which isn't
> >necessarily a drag on performance but can be an administrative
> >chore and can
> >cause more wasted space due to that pesky 'end-of-datafile'
> >free extent.
>
> Mike, I will have to disagree with you about small files not necessarily
> being a drag on performance. Given a specific size of a database, it would
> be better to go in for larger files (avoiding the >2Gb pitfall if possible)
> since each datafile adds its own component to the flurry of I/O activity
> that takes place during log switch, i.e. when all datafile headers need to
> be updated.
>
> In simpler terms, (Large number of) Small datafiles + small redo logs +
> high DML activity = disaster during (the frequent) log switches...
>
> >People who want to
> >set up databases larger than a terabyte will inevitably have a
> >budget to invest
> >in new kit and buy-in to up to date OS and software levels.
> >Not everyone has
> >that luxury and a lot of legacy kit doesn't like 2GB+ files.
> >
> >That's only my opinion but really, why play around with any
> >area that is
> >demonstrably strewn with bugs unless you need to?
>
> Fully agreed!
>
> John Kanagaraj

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Author: Jared Still
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