RE: Performance - Chained Rows

Chuck,

        How can I determine if these are chained or migrated rows ???

        Greets,

   Kirsten

> -----Original Message-----
> From: Chuck Hamilton [SMTP:chuck_hamilton_at_yahoo.com]
> Sent: Tuesday, October 10, 2000 7:20 PM
> To: Multiple recipients of list ORACLE-L
> Subject: Re: Performance - Chained Rows
>
> Absolutely. You first need to determine whether these are true chained
> rows or migrated rows. Both show up in the chain_cnt column of dba_tables.
> If they are migrated rows (most likely), increase the PCTFREE for the
> table, and reorg it. If they are true chained rows and the table contains
> LOBs, store the LOBs in a separate lob segment. If they're chained rows
> and you're not using LOBs your choices are to increase the block size to
> something large enough to accomodate the largest row, or live with it. Be
> advised that changing the block size requires recreating the database.
>
>
> "Weerd Kirsten, E.C. de" <Kirsten.deWeerd_at_Oranjewoud.nl> wrote:
>
>
>
> Hi,
>
> I'm still looking for a cause of performance problems ...
>
> I have found a table, very frequently used in forms and procedures,
> with about 10% chained rows. Other most frequently used tables have
> about
> 0,3 % chained rows. Could this be an issue ???
>
> Greets,
>
> Kirsten
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Weerd Kirsten, E.C. de
> INET: Kirsten.deWeerd_at_Oranjewoud.nl
>
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Received on Thu Oct 12 2000 - 03:28:20 CDT