| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
 |
 | |||
| Oracle FAQ | Your Portal to the Oracle Knowledge Grid | |
|
| |||
Home -> Community -> Usenet -> c.d.o.server -> Re: Export times: affected by size of table or amount of data?
A copy of this was sent to Andy Hardy <aph_at_ahardy.demon.co.uk>
(if that email address didn't require changing)
On Tue, 15 Jun 1999 14:28:29 +0100, you wrote:
>Hi,
>
>If I declare a 100Mb table with no data, will it export in less time
>than the same table full of data?
>
>I thought that export times were only dependent on the quantity of data
>stored, but my customer is telling me otherwise...
>
>Andy
it'll depend. If the 100mb table HAD data at some point and was deleted from -- we will scan to the high water mark looking for data. export tends to full scan tables -- if a select count(*) against that empty table doesn't come back immediately -- neither will export.
See http://www.oracle.com/ideveloper/ for my column 'Digging-in to Oracle8i'... Mirrored (and more current) at http://govt.us.oracle.com/~tkyte/
Current article is "Fine Grained Access Control", added June 8'th
Thomas Kyte tkyte_at_us.oracle.com Oracle Service Industries Reston, VA USA--
 |
 |