RE: 8i Concept PCTFREE & PCTUSED are 0

Hello Sinardy

PCTUSED means that:
After a block was filled with records and the free space in the block is less then pctfree the block is no longer available for further inserts. If however, the data falls beneath PCTUSED the block became again available for inserts.

In your example, block will never again became available, even if empty, because: After a data block becomes full as determined by PCTFREE, Oracle does not consider the block for the insertion of new rows until the percentage of the block being used falls below the parameter PCTUSED.

Yechiel Adar, Mehish Computer Services
adary_at_mehish.co.il

> -----Original Message-----
> From: Sinard Xing [SMTP:sinardyxing_at_bcs-ach.com.sg]
> Sent: Mon, February 18, 2002 11:08 AM
> To: Multiple recipients of list ORACLE-L
> Subject: 8i Concept PCTFREE & PCTUSED are 0
>
> Hi all,
>
> Oracle 8i (81600)
>
> I create user Panadol and give unlimited quota on TBS.
>
> as Panadol I create 1 table like this:
>
> SQL> CREATE TABLE mytable(
> 2 col1 char(3),
> 3 col2 char(4),
> 4 col4 varchar2(4)
> 5 )
> 6 PCTFREE 0
> 7 PCTUSED 0
> 8 STORAGE (
> 9 INITIAL 20K
> 10 NEXT 20K
> 11 PCTINCREASE 0
> 12 MAXEXTENTS 10
> 13 )
> 14 ;
>
> Table created.
>
> SQL> insert into mytable values('abc', 'abcd', 'a');
>
> 1 row created.
>
> SQL> commit;
>
>
> I don't understand That table PCTUSED is 0 ????? where Oracle keep those
> data ?
>
> Look at this:
>
> SQL> select * from mytable;
>
> COL COL2 COL4
> --- ---- ----
> abc abcd a
>
>
>
> Sinardy
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Sinard Xing
> INET: sinardyxing_at_bcs-ach.com.sg
>
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