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RE: Select is fast, insert is very very slow

From: Spears, Brian <BSpears_at_Limitedbrands.com>
Date: Thu, 15 May 2003 06:42:14 -0800
Message-ID: <F001.005998E5.20030515064214@fatcity.com> 





First...do a memory flush to make sure you are not doing a select from
memory so we can compare


Apples to apples.
 


Supply the explain plan for this insert.
Number of rows in each table.
 


Brian
 
 


-----Original Message-----


Sent: Thursday, May 15, 2003 6:07 AM


To: Multiple recipients of list ORACLE-L
 



Hi Ranganath, 



Coudl you please provide us the explain plan for the same? Also you can turn
on autotrace to get the statistics like redo size, sort size, recursive
calls etc.. 



Thanks 


Sami 




 


"Krishnaswamy, Ranganath" <Ranganath.Krishnaswamy_at_blr.hpsglobal.com> 
Sent by: root_at_fatcity.com 


05/15/03 01:31 PM 


Please respond to ORACLE-L 

        
        To:        Multiple recipients of list ORACLE-L
<ORACLE-L_at_fatcity.com> 
        cc:         
        Subject:        Select is fast, insert is very very slow







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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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Spears, Brian
  INET: BSpears_at_Limitedbrands.com

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Received on Thu May 15 2003 - 09:42:14 CDT












Original text of this message













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