Re: EASy question : INDEX PCTFREE 0%
Date: 1996/08/29
Message-ID: <1996Aug29.202545.1792_at_rossinc.com>#1/1
In article <3224B6C6.6D31_at_realsoftware.be> Huijbrechts Rolf <huybrecr_at_realsoftware.be> writes:
>Hi,
>
>I'm a beginner in Oracle DBMS and I want to speed up transactions on a
>database.
>
>I assume that the PCTFREE creation parameter can be 0 for an index as
>the index blocks are never updated. The length of the primary key is
Why assume index blocks are never updated? Oracle attempts to keep a balanced b-tree in its index blocks.
>always the same in this database. I also assumed that in this case the
>Oracle index blocks would contain more keys as more physical space can
>be used ans so the system would respond equally to transactions and
>faster for queries via that index.
>
>Local benchmarks show that inserts and updates on that table are slower
>with Indexes with PCTFREE 0% than ones with PCTFREE 10%.
>
>Who can help me in finding the cause for this ?
>
>Thanks in advance.
>
>Rolf Huijbrechts
>REAL SOFTWARE
>huybrecr_at_realsoftware.be or 101505.533_at_compuserve.com
>-------------------------------------------------------------
>All opinions expressed are mine and not those of my employer.
>-------------------------------------------------------------
-- Joel Garry joelga_at_rossinc.com Compuserve 70661,1534 These are my opinions, not necessarily those of Ross Systems, Inc. <> <> %DCL-W-SOFTONEDGEDONTPUSH, Software On Edge - Don't Push. \ V / panic: ifree: freeing free inodes... OReceived on Thu Aug 29 1996 - 00:00:00 CEST