Re: PctUsed and PctFree when using LMT and 9.2.0.4 on Aix

From: Tanel Poder <tanel.poder.003_at_mail.ee>
Date: Thu, 5 Feb 2004 20:49:38 +0200
Message-ID: <206f01c3ec18$ce8d41c0$eafb23d5@porgand>

Hi!

> I just noticed something that I think is strange. I am creating a new
Curam
> database in a 9.2.0.4 AIX 5.2 machine. I am using all Locally Managed
> Tablespaces. The Create Table scripts all have a pctfree and pctused
entry.
>
> When I look at user_tables, the pctfree entry is noted, but pctused is
null.
> Does this sound strange to anyone else?

Your tablespace is in automatic segment space management (ASSM) mode. In that case you can't explicitly set PCTUSED, instead Oracle will use 4 freeness levels for table blocks internally (in addition to 2 special statuses), putting block back to "free" status when block usage drops at least one level below PCTFREE.

Tanel.

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Received on Thu Feb 05 2004 - 12:49:38 CST