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Re: Select is fast, insert is very very slow

From: <Saminathan_Seerangan_at_i2.com>
Date: Thu, 15 May 2003 02:07:02 -0800
Message-ID: <F001.005995EB.20030515020702@fatcity.com> 





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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-- 
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-- 
Author: Krishnaswamy, Ranganath
  INET: Ranganath.Krishnaswamy_at_blr.hpsglobal.com

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-- 
Author: 
  INET: Saminathan_Seerangan_at_i2.com

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Received on Thu May 15 2003 - 05:07:02 CDT












Original text of this message













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