RE: Question about many Oracle Data Files

>I beg to differ with this persons assessment.
>
>Number of datafiles hardly effect performance in any noticable
>manor. This
>can be noted during checkpoint where high count of data files
>check point
>with similar efficiency of low number.

Christopher,

It is not *only* the number of datafiles that affects performance - it is the combination of number of log switches X number of files that is the problem. A reduction in either of these two equals to a low percentage of I/O for file header update vs actual, 'useful' I/O. A small set of redolog files with a large number of files = disaster (which implements itself as sudden occurences of 'database freeze')

John Kanagaraj

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