Mohammad,
That only works if you can truncate the table.
Dick Goulet
____________________Reply Separator____________________
Author: "Mohammad Rafiq" <[EMAIL PROTECTED]>
Date: 7/25/2001 9:16 AM
Truncation was the solution in this case as I observed in the past that
direct load option use empty blocks above HWM thus using lot of space above
it. If it is possible target table should be truncated before such loads...
Regards
MOHAMMAD RAFIQ
Reply-To: [EMAIL PROTECTED]
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
Date: Wed, 25 Jul 2001 07:03:22 -0800
Lisa,
SQL*Loader in direct path can cause you storage problems since it
always
appends to the table(s) ignoring blocks on the free block list. I found
that
out after a developer was using it for our data warehouse. At the end of a
year
he had burned almost 100GB of disk & it kept increasing even though he was
trying to keep only a rolling 180 window. On a hunch we exported the data,
truncated the table & imported the data back in. The amount of tablespace
being
used dropped 50%.
Dick Goulet
____________________Reply Separator____________________
Author: "Koivu; Lisa" <[EMAIL PROTECTED]>
Date: 7/25/2001 6:26 AM
Hi Sean,
Others have given you different options. Here's some considerations:
1. SQL Script.
* Can be SLOW
* May require intermittent commits in your script
* Manual and error prone
* Must go through SQL engine
2. SQL Loader
* Can be very fast (direct - bypassing SQL engine).
* Direct path load will invalidate indexes.
* You can keep track of rejected records easily (.bad file)
* Dependent upon your file format being EXACT, no errors.
3. Import
* Requires minimal manual fiddling
* Can be very slow - I once imported 150GB and it took ~3 days
* Does not seamlessly handle all object types (INtermedia (domain)
indexes is one example)
* Restarting an import will take a lot longer. If your import fails,
be sure and truncate/drop all tables before starting again.
* Have the option of not including indexes (INDEXES=N)
* Can also reset your storage parms prior to import (export with
data=n, edit file [SSSHHH] and enter new storage parms / import, export with
data=y, import data with IGNORE=Y)
I'm sure others will have additional considerations to share. My choice has
always been exp/imp.
Lisa Koivu
The Vicodin-enhanced DBA
Ft. Lauderdale, FL, USA
> -----Original Message-----
> From: O'Neill, Sean [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, July 25, 2001 6:16 AM
> To: Multiple recipients of list ORACLE-L
> Subject: Data load options
>
> I'm trying to compile a list of options for loading data into an Oracle
> database on NT platform. What I've come up with so far is:
> [1] SQL script that performs inserts, updates.
> [2] SQL Loader utility
> [3] Import utility
>
> Are there others?
> Anyone care to share experience based opinions on pros and cons of the
> methods?
>
>
> Sean :)
>
> Rookie Data Base Administrator
> [0%] OCP Oracle8i DBA
> [0%] OCP Oracle9i DBA
> -------------------------------- ------------
> Organon (Ireland) Ltd.
> E-mail: [EMAIL PROTECTED] [subscribed: Digest Mode]
>
> Visit: http://groups.yahoo.com/group/Oracle-OCP-DBA
>
> "Nobody loves me but my mother... and she could be jivin' too." - BB
King
>
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> Author: O'Neill, Sean
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=US-ASCII">
<META NAME="Generator" CONTENT="MS Exchange Server version 5.5.2653.12">
<TITLE>RE: Data load options</TITLE>
</HEAD>
<BODY>
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Hi Sean, </FONT>
</P>
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Others have given you different
options. Here's some considerations:</FONT>
</P>
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">1. SQL Script. </FONT>
<UL><LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Can be SLOW </FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">May require intermittent
commits
in your script</FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Manual and error
prone</FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Must go through SQL
engine</FONT></LI>
<BR>
</UL>
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">2. SQL Loader</FONT>
<UL><LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Can be very fast (direct -
bypassing SQL engine). </FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Direct path load will
invalidate
indexes. </FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">You can keep track of rejected
records easily (.bad file)</FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Dependent upon your file
format
being EXACT, no errors.</FONT></LI>
<BR>
</UL>
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">3. Import</FONT>
<UL><LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Requires minimal manual
fiddling</FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Can be very slow - I once
imported
150GB and it took ~3 days</FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Does not seamlessly handle all
object types (INtermedia (domain) indexes is one example)</FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Restarting an import will take
a
lot longer. If your import fails, be sure and truncate/drop all tables
before starting again. </FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Have the option of not
including
indexes (INDEXES=N)</FONT></LI>
<LI><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Can also reset your storage
parms
prior to import (export with data=n, edit file [SSSHHH] and enter new
storage
parms / import, export with data=y, import data with IGNORE=Y)</FONT></LI>
<BR>
</UL>
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">I'm sure others will have
additional considerations to share. My choice has always been exp/imp.
</FONT>
</P>
<P><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Lisa Koivu</FONT>
<BR><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">The Vicodin-enhanced
DBA</FONT>
<BR><FONT COLOR="#0000FF" SIZE=2 FACE="Arial">Ft. Lauderdale, FL, USA
</FONT>
</P>
<UL>
<P><FONT SIZE=1 FACE="Arial">-----Original Message-----</FONT>
<BR><B><FONT SIZE=1 FACE="Arial">From: </FONT></B> <FONT SIZE=1
FACE="Arial">O'Neill, Sean [SMTP:[EMAIL PROTECTED]]</FONT>
<BR><B><FONT SIZE=1 FACE="Arial">Sent: </FONT></B> <FONT SIZE=1
FACE="Arial">Wednesday, July 25, 2001 6:16 AM</FONT>
<BR><B><FONT SIZE=1 FACE="Arial">To: </FONT></B>
<FONT
SIZE=1 FACE="Arial">Multiple recipients of list ORACLE-L</FONT>
<BR><B><FONT SIZE=1
FACE="Arial">Subject: </FONT></B>
<FONT
SIZE=1 FACE="Arial">Data load options</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">I'm trying to compile a list of options for
loading
data into an Oracle</FONT>
<BR><FONT SIZE=2 FACE="Arial">database on NT platform. What I've come
up
with so far is:</FONT>
<BR><FONT SIZE=2 FACE="Arial">[1] SQL script that performs inserts,
updates.</FONT>
<BR><FONT SIZE=2 FACE="Arial">[2] SQL Loader utility</FONT>
<BR><FONT SIZE=2 FACE="Arial">[3] Import utility</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">Are there others?</FONT>
<BR><FONT SIZE=2 FACE="Arial">Anyone care to share experience based opinions
on
pros and cons of the</FONT>
<BR><FONT SIZE=2 FACE="Arial">methods?</FONT>
</P>
<BR>
<P><FONT SIZE=2 FACE="Arial">Sean :)</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">Rookie Data Base Administrator</FONT>
<BR><FONT SIZE=2 FACE="Arial">[0%] OCP Oracle8i DBA</FONT>
<BR><FONT SIZE=2 FACE="Arial">[0%] OCP Oracle9i DBA</FONT>
<BR><FONT SIZE=2 FACE="Arial">-------------------------------- ------------
</FONT>
<BR><FONT SIZE=2 FACE="Arial">Organon (Ireland) Ltd.</FONT>
<BR><FONT SIZE=2 FACE="Arial">E-mail: [EMAIL PROTECTED]
[subscribed: Digest Mode]</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">Visit: <A
HREF="http://groups.yahoo.com/group/Oracle-OCP-DBA";
TARGET="_blank">http://groups.yahoo.com/group/Oracle-OCP-DBA</A></FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">"Nobody loves me but my mother... and she
could be jivin' too." - BB King</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">-- </FONT>
<BR><FONT SIZE=2 FACE="Arial">Please see the official ORACLE-L FAQ: <A
HREF="http://www.orafaq.com";
TARGET="_blank">http://www.orafaq.com</A></FONT>
<BR><FONT SIZE=2 FACE="Arial">-- </FONT>
<BR><FONT SIZE=2 FACE="Arial">Author: O'Neill, Sean</FONT>
<BR><FONT SIZE=2 FACE="Arial"> INET: [EMAIL PROTECTED]</FONT>
</P>
<P><FONT SIZE=2 FACE="Arial">Fat City Network Services --
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