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Select is fast, insert is very very slow

From: Krishnaswamy, Ranganath <Ranganath.Krishnaswamy_at_blr.hpsglobal.com>
Date: Thu, 15 May 2003 00:01:39 -0800
Message-ID: <F001.00599423.20030515000139@fatcity.com>


Hi List,

        The below insert statement is taking about 5 minutes to insert around 74,000 records. I have altered the temp_segment_sr_filter table to nologging, increased the number of freelists to 2 and there are no indexes on the temp_segment_sr_filter table. The select statement takes only 250 ms to execute where as while inserting into the temp_segment_sr_filter it takes 5 minutes:

     INSERT /*+ append */ INTO
       TEMP_SEGMENT_SR_FILTER (FLIGHT_SCH_KEY, FLIGHT_SCH_TYPE, FLIGHT_NO,
FLIGHT_SGT_KEY, ORG_STN_KEY, DEST_STN_KEY, SERVICE_CODE, AC_TYPE_KEY, POSITION_CODE)
     SELECT
       TDFS.FLIGHT_SCH_KEY,
       TDFS.FLIGHT_SCH_TYPE,
       FSH.FLIGHT_NO,
       FSG.FLIGHT_SGT_KEY,
       FSG.ORG_STN_KEY,
       FSG.DEST_STN_KEY,
       TOS.SERVICE_CODE,
       FSG.AC_TYPE_KEY AS AC_TYPE_KEY,
       POS.POSITION_CODE
     FROM
       TEMP_DAY_FLIGHT_SCHEDULE TDFS,
       FLIGHT_SCHEDULE FSH,
       FLIGHT_SGT FSG,
       TEMP_OFP_SERVICE TOS,
       POSITION POS
     WHERE
           TDFS.FLIGHT_SCH_KEY = FSH.FLIGHT_SCH_KEY
       AND FSH.FLIGHT_SCH_KEY = FSG.FLIGHT_SCH_KEY
       AND TOS.SERVICE_CODE <> '*'
       AND POS.POSITION_CODE <> '*'
       AND TDFS.FLIGHT_SCH_TYPE = 'F'
       AND FSG.AC_TYPE_KEY <> 132
       AND NOT EXISTS (
                         SELECT
                           /*+ index(SR i2_station_restriction) no_expand */
1
                         FROM
                           STATION_RESTRICTION SR,
                           STN_RSTCN_TO_FRM SRTF,
                           STN_RESTRICTION_SPL_CODE SRSC
                         WHERE
                                SR.STN_RSTCN_KEY = SRTF.STN_RSTCN_KEY
                            AND SR.STN_RSTCN_KEY = SRSC.STN_RSTCN_KEY (+)
                            AND SRSC.STN_RSTCN_KEY IS NULL
                            AND (SR.AC_TYPE_KEY = FSG.AC_TYPE_KEY OR
SR.AC_TYPE_KEY = 517 )
                            AND (
                                   (
                                          POS.POSITION_CODE IN ('E', 'TE')
                                      AND (

(
SR.STN_KEY = FSG.ORG_STN_KEY AND ( (SRTF.STN_KEY = FSG.DEST_STN_KEY) OR (SRTF.STN_KEY = 0) OR (SRTF.STN_KEY IS NULL AND
SRTF.COUNTRY_KEY = (SELECT COUNTRY_KEY FROM STATION WHERE STN_KEY = FSG.DEST_STN_KEY)) )
                                                AND SR.AIRLINE_KEY = (SELECT
AIRLINE_KEY FROM AIRLINE WHERE AIRLINE_CODE = SUBSTR(FSH.FLIGHT_NO, 1, 2) )
                                              )
                                              OR
                                              (
                                                     SR.STN_KEY = 0
                                                 AND ( (SRTF.STN_KEY =
FSG.DEST_STN_KEY) OR (SRTF.STN_KEY = 0) OR (SRTF.STN_KEY IS NULL AND
SRTF.COUNTRY_KEY = (SELECT COUNTRY_KEY FROM STATION WHERE STN_KEY = FSG.DEST_STN_KEY)) )
                                                 AND SR.AIRLINE_KEY IN (
(SELECT AIRLINE_KEY FROM AIRLINE WHERE AIRLINE_CODE = SUBSTR(FSH.FLIGHT_NO, 1, 2)) , 106 )
                                              )
                                          )
                                      AND (SR.VALID_FROM <=
TRUNC(to_date('14-May-03'))+FSG.DEP_DAY_CHG AND SR.VALID_TO >= TRUNC(to_date('14-May-03'))+FSG.DEP_DAY_CHG)
                                      AND (SR.WEEKDAYS LIKE ('%' ||
DECODE(TO_CHAR(TRUNC(to_date('14-May-03'))+FSG.DEP_DAY_CHG, 'D'), '1', '7', TO_NUMBER(TO_CHAR(TRUNC(to_date('14-May-03'))+FSG.DEP_DAY_CHG , 'D')) - 1 ) || '%'))
                                   )
                                   OR
                                   (
                                          POS.POSITION_CODE IN ('I', 'TI')
                                      AND (

(
SR.STN_KEY = FSG.DEST_STN_KEY AND ( (SRTF.STN_KEY =
FSG.ORG_STN_KEY) OR (SRTF.STN_KEY = 0) OR (SRTF.STN_KEY IS NULL AND SRTF.COUNTRY_KEY = (SELECT COUNTRY_KEY FROM STATION WHERE STN_KEY = FSG.ORG_STN_KEY)) )
                                                AND SR.AIRLINE_KEY = (SELECT
AIRLINE_KEY FROM AIRLINE WHERE AIRLINE_CODE = SUBSTR(FSH.FLIGHT_NO, 1, 2) )
                                             )
                                             OR

(
SR.STN_KEY = 0 AND ( (SRTF.STN_KEY =
FSG.ORG_STN_KEY) OR (SRTF.STN_KEY = 0) OR (SRTF.STN_KEY IS NULL AND SRTF.COUNTRY_KEY = (SELECT COUNTRY_KEY FROM STATION WHERE STN_KEY = FSG.ORG_STN_KEY)) )
                                                AND SR.AIRLINE_KEY IN
((SELECT AIRLINE_KEY FROM AIRLINE WHERE AIRLINE_CODE = SUBSTR(FSH.FLIGHT_NO, 1, 2)) , 106 )
                                             )
                                          )
                                      AND (SR.VALID_FROM <=
TRUNC(to_date('14-May-03')) + FSG.ARR_DAY_CHG AND SR.VALID_TO >= TRUNC(to_date('14-May-03')) + FSG.ARR_DAY_CHG )
                                      AND (SR.WEEKDAYS LIKE ('%' ||
DECODE(TO_CHAR(TRUNC(to_date('14-May-03'))+FSG.ARR_DAY_CHG, 'D'), '1', '7', TO_NUMBER(TO_CHAR(TRUNC(to_date('14-May-03'))+FSG.ARR_DAY_CHG, 'D')) - 1 ) || '%'))
                                   )
                                )
                            --AND (SR.WEEKDAYS LIKE '%3%')
                            AND (
                                      (SR.RESTRICTED_POSITION = '*' AND
SR.SERVICE_KEY = 5 )
                                   OR (SR.RESTRICTED_POSITION =
POS.POSITION_CODE AND SR.SERVICE_KEY = 5 )
                                   OR (SR.RESTRICTED_POSITION = '*' AND
SR.SERVICE_KEY = TOS.SERVICE_KEY )
                                   OR (SR.RESTRICTED_POSITION =
POS.POSITION_CODE AND SR.SERVICE_KEY = TOS.SERVICE_KEY )
                                )
                            AND IS_ALLOWED = 'N'
                       )     

Can anybody help me in imporving the insert performance? Any help in this regard is very much appreciated.

Thanks and Regards,

Ranganath

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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Krishnaswamy, Ranganath
  INET: Ranganath.Krishnaswamy_at_blr.hpsglobal.com

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Received on Thu May 15 2003 - 03:01:39 CDT

Original text of this message

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