Create table taking much time
Hi all,
I have to copy one table with more than 1 lakh records from one schema (deloitte) into another schema (dell). It is taking more time but not getting output as early as possible.
Is there any alternative way to make it more faster for copying the data.
Create table dell.newtable as
(select * from deloitte.oldtable)
Advance thanks
Costa wrote:
Hi all,
I have to copy one table with more than 1 lakh records from one schema (deloitte) into another schema (dell). It is taking more time but not getting output as early as possible.
Is there any alternative way to make it more faster for copying the data.
Create table dell.newtable as
(select * from deloitte.oldtable)the slow down is NOT CREATE TABLE itself.
The slowdown is populating the new table with old data.
Other sessions can not see uncommitted data.
So until the statement completes other sessions have no rows to access.
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<removed by moderator>
The part of report Soure code is as below:
<long code part removed by moderator>
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Moderator message: please stay within the 2500 character limit to preserve formatting, only post relevant portions of the code, also please read the following sticky thread before posting.
Please Read before Posting in the Performance and Tuning Forum
locked by: Thomas Zloch on Sep 15, 2010 11:40 AMHi Friends,
There is report for Goods movement rel. to Service orders + Acc.indicator.
We have two testing Systems(EBQ for developer and PEQ from client side).
EBQ system contains replica of PEQ every month.
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A_MJAHR Material Doc. Year (Mandatory)
S_BLDAT Document Date(Optional)
S_BUDAT Posting Date(Optional)
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Client not agrrying to make Material Documen as Mandatory.
The main (first) table hit is on AUFM table .As there are non-key fileds as well in where condition,We have cretaed a secondary index as well for AUFM table on the following fields:
BLDAT
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Even then also ,in PEQ sytem the report is taking very long time ,Some times not even getting the ALV output.
What can be done to get teh report executed very fast.
<removed by moderator>
The part of report Soure code is as below:
<long code part removed by moderator>
Thanks and Regards,
Rama chary.P
Moderator message: please stay within the 2500 character limit to preserve formatting, only post relevant portions of the code, also please read the following sticky thread before posting.
Please Read before Posting in the Performance and Tuning Forum
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No I couldn't resolve till now
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Hi All,
I have one query which is taking much time in dev envi where data size is very small and planning to implement this query in production database where database size is huge. Plz let me know how I can optimize this query.
select count(*) from
select /*+ full(tls) full(tlo) parallel(tls,2) parallel(tls, 2) */
tls.siebel_ba, tls.msisdn
from
TDB_LIBREP_SIEBEL tls, TDB_LIBREP_ONDB tlo
where
tls.siebel_ba = tlo.siebel_ba (+) and
tls.msisdn = tlo.msisdn (+) and
tlo.siebel_ba is null and
tlo.msisdn is null
union
select /*+ full(tls) full(tlo) parallel(tls,2) parallel(tls, 2) */
tlo.siebel_ba, tlo.msisdn
from
TDB_LIBREP_SIEBEL tls, TDB_LIBREP_ONDB tlo
where
tls.siebel_ba (+) = tlo.siebel_ba and
tls.msisdn (+) = tlo.msisdn and
tls.siebel_ba is null and
tls.msisdn is null
explain plan of above query is
| Id | Operation | Name | Rows | Bytes | Cost | TQ |IN-OUT| PQ Distrib |
| 0 | SELECT STATEMENT | | 1 | | 14 | | | |
| 1 | SORT AGGREGATE | | 1 | | | | | |
| 2 | SORT AGGREGATE | | 1 | | | 41,04 | P->S | QC (RAND) |
| 3 | VIEW | | 164 | | 14 | 41,04 | PCWP | |
| 4 | SORT UNIQUE | | 164 | 14104 | 14 | 41,04 | PCWP | |
| 5 | UNION-ALL | | | | | 41,03 | P->P | HASH |
|* 6 | FILTER | | | | | 41,03 | PCWC | |
|* 7 | HASH JOIN OUTER | | | | | 41,03 | PCWP | |
| 8 | TABLE ACCESS FULL| TDB_LIBREP_SIEBEL | 82 | 3526 | 1 | 41,03 | PCWP | |
| 9 | TABLE ACCESS FULL| TDB_LIBREP_ONDB | 82 | 3526 | 2 | 41,00 | S->P | BROADCAST |
|* 10 | FILTER | | | | | 41,03 | PCWC | |
|* 11 | HASH JOIN OUTER | | | | | 41,03 | PCWP | |
| 12 | TABLE ACCESS FULL| TDB_LIBREP_ONDB | 82 | 3526 | 2 | 41,01 | S->P | HASH |
| 13 | TABLE ACCESS FULL| TDB_LIBREP_SIEBEL | 82 | 3526 | 1 | 41,02 | P->P | HASH |
Predicate Information (identified by operation id):
6 - filter("TLO"."SIEBEL_BA" IS NULL AND "TLO"."MSISDN" IS NULL)
7 - access("TLS"."SIEBEL_BA"="TLO"."SIEBEL_BA"(+) AND "TLS"."MSISDN"="TLO"."MSISDN"(+))
10 - filter("TLS"."SIEBEL_BA" IS NULL AND "TLS"."MSISDN" IS NULL)
11 - access("TLS"."SIEBEL_BA"(+)="TLO"."SIEBEL_BA" AND "TLS"."MSISDN"(+)="TLO"."MSISDN")user3479748 wrote:
Hi All,
I have one query which is taking much time in dev envi where data size is very small and planning to implement this query in production database where database size is huge. Plz let me know how I can optimize this query.
select count(*) from
select /*+ full(tls) full(tlo) parallel(tls,2) parallel(tls, 2) */
tls.siebel_ba, tls.msisdn
from
TDB_LIBREP_SIEBEL tls, TDB_LIBREP_ONDB tlo
where
tls.siebel_ba = tlo.siebel_ba (+) and
tls.msisdn = tlo.msisdn (+) and
tlo.siebel_ba is null and
tlo.msisdn is null
union
select /*+ full(tls) full(tlo) parallel(tls,2) parallel(tls, 2) */
tlo.siebel_ba, tlo.msisdn
from
TDB_LIBREP_SIEBEL tls, TDB_LIBREP_ONDB tlo
where
tls.siebel_ba (+) = tlo.siebel_ba and
tls.msisdn (+) = tlo.msisdn and
tls.siebel_ba is null and
tls.msisdn is null
) ;explain plan of above query is
| Id | Operation | Name | Rows | Bytes | Cost | TQ |IN-OUT| PQ Distrib |
| 0 | SELECT STATEMENT | | 1 | | 14 | | | |
| 1 | SORT AGGREGATE | | 1 | | | | | |
| 2 | SORT AGGREGATE | | 1 | | | 41,04 | P->S | QC (RAND) |
| 3 | VIEW | | 164 | | 14 | 41,04 | PCWP | |
| 4 | SORT UNIQUE | | 164 | 14104 | 14 | 41,04 | PCWP | |
| 5 | UNION-ALL | | | | | 41,03 | P->P | HASH |
|* 6 | FILTER | | | | | 41,03 | PCWC | |
|* 7 | HASH JOIN OUTER | | | | | 41,03 | PCWP | |
| 8 | TABLE ACCESS FULL| TDB_LIBREP_SIEBEL | 82 | 3526 | 1 | 41,03 | PCWP | |
| 9 | TABLE ACCESS FULL| TDB_LIBREP_ONDB | 82 | 3526 | 2 | 41,00 | S->P | BROADCAST |
|* 10 | FILTER | | | | | 41,03 | PCWC | |
|* 11 | HASH JOIN OUTER | | | | | 41,03 | PCWP | |
| 12 | TABLE ACCESS FULL| TDB_LIBREP_ONDB | 82 | 3526 | 2 | 41,01 | S->P | HASH |
| 13 | TABLE ACCESS FULL| TDB_LIBREP_SIEBEL | 82 | 3526 | 1 | 41,02 | P->P | HASH |
Predicate Information (identified by operation id):
6 - filter("TLO"."SIEBEL_BA" IS NULL AND "TLO"."MSISDN" IS NULL)
7 - access("TLS"."SIEBEL_BA"="TLO"."SIEBEL_BA"(+) AND "TLS"."MSISDN"="TLO"."MSISDN"(+))
10 - filter("TLS"."SIEBEL_BA" IS NULL AND "TLS"."MSISDN" IS NULL)
11 - access("TLS"."SIEBEL_BA"(+)="TLO"."SIEBEL_BA" AND "TLS"."MSISDN"(+)="TLO"."MSISDN")
I dunno, it looks like you are getting all the things that are null with an outer join, so won't that decide to full scan anyways? Plus the union means it will do it twice and do a distinct to get rid of dups - see how it does a union all and then sort unique. Somehow I have the feeling there might be a more trick way to do what you want, so maybe you should state exactly what you want in English. -
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