From jkstill@cybcon.com Sat, 18 Aug 2001 11:39:53 -0700
From: Jared Still <jkstill@cybcon.com>
Date: Sat, 18 Aug 2001 11:39:53 -0700
Subject: Re: Index space not freed when rows deleted?
Message-ID: <F001.0037030F.20010818113608@fatcity.com>
MIME-Version: 1.0
Content-Type: text/plain



Jay,

Index blocks can be reused, but unlike a table block,
they are not reused until *all* data is removed from
the block.


So if you remove most rows, it won't help if most blocks
still have a pointer to a row.

Jared

On Wednesday 15 August 2001 13:48, Miller, Jay wrote:
> I'm puzzled.
> We had a table that hit maximum extents on our QA server (unlike production
> it isn't cleaned out on a daily basis).  I deleted most of the rows,
> leaving only a few thousand.
> The next day, when inserting more rows I hit the maxextents exceeded error
> on an index on that table (of course the number of extents hadn't been
> reduced but I would have thought there'd be plenty of room in 121 existing
> extents after most of the rows were deleted).  I rebuilt the index and it
> went from 121 extents to 1 extent, resolving the problem, but leaving some
> curiosity.
> It's a primary key sequence based index.  Any ideas?
>
>
> Jay Miller
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Author: Jared Still
  INET: jkstill@cybcon.com

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