Return-Path: Received: from ensim.rackshack.net (root@localhost) by orafaq.net (8.11.6/8.11.6) with ESMTP id g9ANWWB12345 for ; Thu, 10 Oct 2002 18:32:32 -0500 X-ClientAddr: 209.68.248.164 Received: from newsfeed.cts.com (newsfeed.cts.com [209.68.248.164]) by ensim.rackshack.net (8.11.6/8.11.6) with ESMTP id g9ANWWD12336 for ; Thu, 10 Oct 2002 18:32:32 -0500 Received: from fatcity.UUCP (uucp@localhost) by newsfeed.cts.com (8.9.3/8.9.3) with UUCP id OAA69321; Thu, 10 Oct 2002 14:14:07 -0700 (PDT) Received: by fatcity.com (26-Feb-2001/v1.0g-b72/bab) via UUCP id 004E63EA; Thu, 10 Oct 2002 13:38:47 -0800 Message-ID: Date: Thu, 10 Oct 2002 13:38:47 -0800 To: Multiple recipients of list ORACLE-L X-Comment: Oracle RDBMS Community Forum X-Sender: "Yechiel Adar" Sender: root@fatcity.com Reply-To: ORACLE-L@fatcity.com Errors-To: ML-ERRORS@fatcity.com From: "Yechiel Adar" Subject: Re: sequence numbers Organization: Fat City Network Services, San Diego, California X-ListServer: v1.0g, build 72; ListGuru (c) 1996-2001 Bruce A. Bergman Precedence: bulk Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0216_01C270B7.147C1F00" ------=_NextPart_000_0216_01C270B7.147C1F00 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I think that you will have an update to the sequence number EVERY time = instead of every 20 times. That's mean I/o for every nextval. Yechiel Adar Mehish ----- Original Message -----=20 From: Tim Gorman=20 To: Multiple recipients of list ORACLE-L=20 Sent: Thursday, October 10, 2002 7:43 PM Subject: Re: sequence numbers CACHE 20 is the default, so if you remove the clause, it will have = absolutely no impact on performance or anything else... =20 ...of course, I get the feeling that that wasn't the gist of your = question, was it? ----- Original Message -----=20 From: April Wells=20 To: Multiple recipients of list ORACLE-L=20 Sent: Wednesday, October 09, 2002 8:54 AM Subject: sequence numbers I have been given create scripts for sequences to be used in tables = that will be loaded via bulk loads. How huge is the potential = performance hit if I take out the cache 20? April Wells=20 Oracle DBA=20 There is neither good nor bad, but thinking makes it so. = -Shakespeare ------=_NextPart_000_0216_01C270B7.147C1F00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I think that you will have an update to = the=20 sequence number EVERY time instead of every 20 times. That's mean I/o = for every=20 nextval.
 
Yechiel Adar
Mehish
----- Original Message -----
From:=20 Tim = Gorman=20
Sent: Thursday, October 10, = 2002 7:43=20 PM
Subject: Re: sequence = numbers

CACHE 20 is the default, so if you remove the = clause, it=20 will have absolutely no impact on performance or anything = else...
 
...of course, I get the feeling that that = wasn't the=20 gist of your question, was it?
----- Original Message -----
From:=20 April = Wells=20
To: Multiple=20 recipients of list ORACLE-L
Sent: Wednesday, October 09, = 2002 8:54=20 AM
Subject: sequence = numbers

I have been given create = scripts for=20 sequences to be used in tables that will be loaded via bulk = loads.  How=20 huge is the potential performance hit if I take out the cache=20 20?
 

April Wells
Oracle DBA 
There is neither good nor bad, but = thinking makes it=20 so.=20 -Shakespeare

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