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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Select is fast, insert is very very slow
What version of oracle?
I have seen this behaviour in Oracle 8.0 that during the insert the explain plan for the select stuff was different than for the plain select. Running explain plan however did not reveal this (Have you tried explain planning this?) but I send a trace file to support and they came back with the difference. putting in a hint solved the problem/bug.
Jack
-----Original Message-----
[mailto:Ranganath.Krishnaswamy_at_blr.hpsglobal.com]
Sent: donderdag 15 mei 2003 10:02
To: Multiple recipients of list ORACLE-L
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 (
)
)
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
)
)
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 Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-LReceived on Thu May 15 2003 - 04:11:45 CDT
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