RE: Speed up massive delete

[Henry Poras]

Wow, I didn't know you could write e-mail with lemon juice. It happened to me too.   Henry -----Original Message----- From: Jim Conboy [mailto:[EMAIL PROTECTED]] Sent: Thursday, June 28, 2001 12:28 PM To: Multiple recipients of list ORACLE-L Subject: Re: Speed up massive delete Not sure how this message looked to everybody on the list.  When I rec'd it, all I could see was the ALTER statements.  But I know that the create statements and direct loads work also.  When I went to reply as such, lo and behold the missing create/direct load statements appeared as they should.  Just wanted to point that out, because Joe as provided the definitive answer, but only if you can read his entire response!  Weird.   Jim >>> [EMAIL PROTECTED] 06/28/01 11:06AM >>> ok lets cover this again on unrecoverable/nologging(yes i've done the research and demo it in my logminer presentation):       •If I have my table as set to nologging, will my DML still show up in the redo logs? •Yes it will, which options the nologging option has an effect on   •Only the following operations can make use of the NOLOGGING option: • alter table...move partition • alter table...split partition • alter index...split partition • alter index...rebuild • alter index...rebuild partition  •create table...as select • create index • direct load with SQL*Loader • direct load INSERT     Other SQL statements (such as UPDATE, DELETE, conventional path INSERT, and various DDL statements not listed above) are unaffected by the NOLOGGING attribute of the schema object, so yes you DML will appear in the redo/archive logs.   joe       >>> [EMAIL PROTECTED] 06/28/01 10:24AM >>> Ron, How does creating indexes as UNRECOVERABLE save time when you insert data? As far as I'm aware the only operation it will save time on is the initial creation. Regards, Mike |--------+-----------------------> |        |          "Ron Rogers" | |        |          <RROGERS@galo| |        |          ttery.org>   | |        |                       | |        |          06/28/01     | |        |          02:51 PM     | |        |          Please       | |        |          respond to   | |        |          ORACLE-L     | |        |                       | |--------+----------------------->   >-------------------------------------------------------------------|   |                                                                   |   |       To:     Multiple recipients of list ORACLE-L                |   |       <[EMAIL PROTECTED]>                                      |   |       cc:     (bcc: Mike Hately/ETECH)                            |   |       Subject:     Re: Speed up massive delete                    |   >-------------------------------------------------------------------| Jack Drop the indexes first before you do the deletes will save you time by not creating logs for the indexes being deleted. On my large activity files I have created the indexes as "Unrecoverable" saving time when I add data or delete data. ROR m�֪m >>> [EMAIL PROTECTED] 06/28/01 05:45AM >>> Hi All, I have to do some pretty big deletes on a test environment and they are estimated to take for ever. Are there any options to speed it up? Jack ===================================================================== De informatie verzonden in dit e-mailbericht is vertrouwelijk en is uitsluitend bestemd voor de geadresseerde. Openbaarmaking, vermenigvuldiging, verspreiding en/of verstrekking van deze informatie aan derden is, behoudens voorafgaande schriftelijke toestemming van Ernst & Young, niet toegestaan. Ernst & Young staat niet in voor de juiste en volledige overbrenging van de inhoud van een verzonden e-mailbericht, noch voor tijdige ontvangst daarvan. 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A copy of these terms and conditions is available on request free of charge. ===================================================================== -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author:   INET: [EMAIL PROTECTED] Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051 San Diego, California        -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Ron Rogers   INET: [EMAIL PROTECTED] Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051 San Diego, California        -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author:   INET: [EMAIL PROTECTED] Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051 San Diego, California        -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (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).