Re: Phew ... Finally Migrated

From: Jared Still <jkstill_at_cybcon.com>
Date: Mon, 14 Oct 2002 08:43:45 -0800
Message-ID: <F001.004E825D.20021014084345@fatcity.com>

Raj,

The effect of commit=y is greatly effected the the setting of buffer=N. How big was your buffer?

If you left at default, that would seriously slow down your import. I think the default size is platform dependent and possibly db block size dependent ( too lazy to RTFM ), but it's always too small.

I've found that buffer=10485760 works pretty well for me in most cases. It requires a little experimentation to find an optimal value, but in my somewhat limited testing of it, I've found that values over 10m don't offer much more performance.

Jared

On Monday 14 October 2002 08:23, Jamadagni, Rajendra wrote:
> Over the weekend we migrated all our production systems on 9201 on AIX.
>
> I know it is not all that important, but thought I'd let everyone know. I
> also learned the magic of commit=y/n setting on imp. I have one table (it
> had a long column) that was taking 6600 seconds to import with commit=y.
> After looking up Metalink, I changes the commit=y to commit=n, the same
> import finishes in 1010 seconds.
>
> I have 14G of undo tablespace, so I changed commit=n for import on all
> tables with long columns ... the time for import was reduced dramatically.
>
> Raj
> ______________________________________________________
> Rajendra Jamadagni MIS, ESPN Inc.
> Rajendra dot Jamadagni at ESPN dot com
> Any opinion expressed here is personal and doesn't reflect that of ESPN
> Inc.
>
> QOTD: Any clod can have facts, but having an opinion is an art!

---

Content-Type: text/html; charset="iso-8859-1"; name="Attachment: 1"
Content-Transfer-Encoding: quoted-printable
Content-Description: 
----------------------------------------

----------------------------------------
Content-Type: text/plain; charset="iso-8859-1"; name="ESPN_Disclaimer.txt"
Content-Transfer-Encoding: 7bit

Content-Description:

---

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Jared Still
  INET: jkstill_at_cybcon.com

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).

Received on Mon Oct 14 2002 - 11:43:45 CDT