Re: PCTFREE and PCTUSED

>The answer is that
>free list handling is overhead, which means that the database is working on
>its own structures and not working on the user data. It's easy to conceive a
>busy transaction table to which records are frequently added and from which
>they're frequently removed. Having only one parameter would significantly
>increase the amount of time spent in moving blocks to and from the free
>list,
>and significantly increase the overhead. You can test it by setting up a
>table
>with PCTFREE+PCTUSED=100. In other word, the answer to your question is that
>two parameters are needed to reduce the overhead of the free list maintenance.

By the way, I just wanted to let you know I tried that PCTFREE+PCTUSED=100 I used PCTFREE 40 and PCTUSED 60 on a specific table space, and created a table there which I updated/deleted records quite a bit, but I didnt see much
of a difference. It might have been because there werent many people on the system at the time.

thx
maa

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Author: Maryann Atkinson
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