IMPORT TAKES LONG TIME THAN EXPORT

Hi,
My database is of
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for Solaris: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
EXPORT the schema which is of around 358 GB size
expdp username/password@TEST directory=DATAPUMP dumpfile=TEST_SEP22_%U.dmp logfile=TEST_SEP22.log schemas=TEST parallel=6 exclude=statistics
The export completed in 30 minutes
When started to import into another schema in the same server even using parallel=6 it takes around 15 hours.Can anyone say why it takes a long time to import.
impdp username/password@TEST directory=DATAPUMP dumpfile=TEST_SEP22_%U.dmp logfile=TESTIMP_SEP22.log remap_schema=TEST:TEST_R1 remap_tablespace=TS_TEST:TS_TEST_R1 parallel=6
Please advice.
Thnks in advance

ora wrote:
Is there any parameter to make the import faster still in 10g
Please adviceAdvice: OPen the fine Utilities reference manual found at tahiti.oracle.com, and check the section on DataPump. THere you will find listed and explained all of the available parameters. I'm sure you will find some of them promising for performance improvement.
The reason the import takes longer than the export is because of all the internal houskeeping going on in relation to every INSERT that is processed. The export is simply reading the db, then writing to a flat file.

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2 ;
9 rows selected.
Execution Plan
Plan hash value: 3745571015
| Id | Operation | Name |
| 0 | SELECT STATEMENT | |
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| 2 | NESTED LOOPS | |
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NAME                                 TYPE        VALUE
streams_pool_size                    big integer 48M
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2 ;
USERNAME                              SID    SERIAL# STATUS   EVENT                                                    SECONDS_IN_WAIT WAIT_TIME STATE               MODULE
CDR                                    73          1 ACTIVE   wait for unread message on broadcast channel                                   3          0 WAITING
CDR                                    75          1 ACTIVE   wait for unread message on broadcast channel                                  10          0 WAITING
CDR                                    77          1 ACTIVE   wait for unread message on broadcast channel                                  10          0 WAITING
CDR                                    81        313 ACTIVE   wait for unread message on broadcast channel                                 530          0 WAITING             impdp.exe
CDR                                    87         70 ACTIVE   enq: SS - contention                                                1581          0 WAITING             toad.exe
CDR                                    90       1575 ACTIVE   wait for unread message on broadcast channel                                   3          0 WAITING
CDR                                    92       1686 ACTIVE   enq: SS - contention                                                 619          0 WAITING
CDR                                    99          5 ACTIVE   PX Deq Credit: send blkd                                               0          0 WAITING             TOAD 9.1.0.62
CDR                                   103          3 ACTIVE   direct path read                                                       0          0 WAITING             TOAD 9.1.0.62
CDR                                   105          6 ACTIVE   direct path read                                                       0          0 WAITING             TOAD 9.1.0.62
CDR                                   107          6 ACTIVE   PX Deq Credit: send blkd                                               0          0 WAITING             TOAD 9.1.0.62
USERNAME                              SID    SERIAL# STATUS   EVENT                                                    SECONDS_IN_WAIT WAIT_TIME STATE               MODULE
CDR                                   108         16 ACTIVE   PX Deq Credit: send blkd                                               1          0 WAITING             TOAD 9.1.0.62
CDR                                   109         40 ACTIVE   PX Deq Credit: send blkd                                               1          0 WAITING             TOAD 9.1.0.62
CDR                                   110          6 ACTIVE   enq: TX - row lock contention                                          1          0 WAITING             TOAD 9.1.0.62
CDR                                   111         21 ACTIVE   direct path read                                                       0          0 WAITING             TOAD 9.1.0.62
CDR                                   112         27 ACTIVE   PX Deq Credit: send blkd                                               1          0 WAITING             TOAD 9.1.0.62
CDR                                   113          8 ACTIVE   log buffer space                                                       0          0 WAITING             TOAD 9.1.0.62
CDR                                   117       4496 ACTIVE   db file scattered read                                                 0          0 WAITING             TOAD 9.1.0.62
CDR                                   119          9 ACTIVE   PX Deq Credit: send blkd                                               0          0 WAITING             TOAD 9.1.0.62
CDR                                   120         27 ACTIVE   PX Deq Credit: send blkd                                               0          0 WAITING             TOAD 9.1.0.62
CDR                                   123          1 ACTIVE   sort segment request                                               22349          0 WAITING
CDR                                   129         22 ACTIVE   PX Deq Credit: send blkd                                               0          0 WAITING             TOAD 9.1.0.62
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CDR                                   131      14402 INACTIVE SQL*Net message from client                                         2580          0 WAITING             TOAD 9.1.0.62
CDR                                   135         11 ACTIVE   log buffer space                                                       0          0 WAITING             TOAD 9.1.0.62
CDR                                   136          6 ACTIVE   direct path read                                                       0          0 WAITING             TOAD 9.1.0.62
CDR                                   138        234 ACTIVE   sort segment request                                               19859          0 WAITING
CDR                                   162        782 INACTIVE SQL*Net message from client                                          550          0 WAITING             TOAD 9.1.0.62
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Copyright (c) 2003, Oracle. All rights reserved.
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