On 5/8/06 11:46 AM, "Tom Lane" <[EMAIL PROTECTED]> wrote:

> I made a table of 16M rows with an
> index over a random-data integer column.  With a thoroughly disordered
> index (built on-the-fly as the random data was inserted), the time to
> VACUUM after deleting a small number of rows was 615 seconds with
> yesterday's code, 31 seconds today.  With a perfectly-ordered index
> (identical table, but CREATE INDEX after all the data is in place), the
> times were about 28 and 26 seconds respectively.

Very impressive!  This corroborates findings we've had with index
maintenance in the field - thanks for finding/fixing this.

- Luke

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