RE: Fragmentation & Locally Managed Tablespaces

Thanks indeed for the Article's Excerpt , Paul

Our db_block_size=8K

> -----Original Message-----
> From: Paul Drake [SMTP:paled_at_home.com]
> Sent: Thursday, June 28, 2001 1:46 PM
> To: Multiple recipients of list ORACLE-L
> Subject: Re: Fragmentation & Locally Managed Tablespaces
>
> VIVEK_SHARMA wrote:
> >
> > Is Fragmentation of Objects meaningless in Locally managed
> Tablespaces
> > Assuming EXTENTS is 3,000 for Some of the Objects
> >
> > Or Do the Objects need to be DE-Fragmented using exp/imp ?
> >
>
> Vivek,
>
> funny, I was just looking into this tonight.
>
> what is your block size?
>
> I would recommend a quick visit to our friend Steve Adams site:
>
> http://www.ixora.com.au/tips/creation/extents.htm
>
> "For this reason, we recommend that the number of extents per segment
> in
> locally managed tablespaces be limited to the number of rows that can
> be
> accommodated in the extent map within the segment header block
> - that is, approximately (db_block_size / 16) - 7."
>
> for an 8 KB block size - that is 505 extents per segment.
>
> Those objects would be good candidates to move to a different (new?)
> tablespace with a larger (uniform) extent size.
>
> Paul
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> Author: Paul Drake
> INET: paled_at_home.com
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--
Author: VIVEK_SHARMA
  INET: VIVEK_SHARMA_at_infy.com

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