Interested to Buy Any Domain ? << Click Here >> for more details...
In ur current projectu have done any performance tuning of
mappings?
- 1 Answers
- 4555 Views
- I also Faced
- E-Mail Answers
Answer / sreedhar lokaray
Many people are not sure how exactly to tune the
performance of a mapping. There is no thumb rule for
performance tuning. A tuning done in one mapping cannot be
applied into another mapping. But still below given are
some of the performance tuning tips.
Joiner instead of Lookup: If the lookup table has large no.
of records then the performance will affect because it has
to build the cache. Instead use a joiner transformation and
check it as detail rows. This will avoid building cache.
Sorted Input: Use sorter transformation before joiner or
aggregator. This will improve the performance.
Source Qualifier: Try to filter out unwanted records in the
source qualifier before moving to the next transformation.
Also delete unconnected/unused ports.
Indexes: Try to have proper indexes on the required fields
of the tables in the database which will increase the
performance. At the same time having indexes on the target
will kill the performance when you try to insert huge
volumes of data. To avoid this, disable the indexes on the
target (using sql loader direct load process) and then load
the data. After loading enable the index back.
Keep in mind that tuning performance of one transformation
can kill the performance of other transformation. We have
to maintain the equilibrium.
| Is This Answer Correct ? | 8 Yes | 0 No |
my table contain duplicate Records i wanna load uniq records to my table . i have to pass the uniq records through filter t/r how?
What is an expression transformation in informatica?
What is Session and Batches?
HOW CAN I SEND HALF OF THE RECORDS TO ONE TARGET AND REMAINING TO OTHER TARGET?
Explain the etl program with few examples.
How can the following be achieved in 1 single Informatica Mapping. * If the Header table record has error value(NULL) then those records and the corresponding child records in the SUBHEAD and DETAIL tables should also not be loaded into the target(TARGET1,TARGET 2 or TARGET3). * If the HEADER table record is valid, but the SUBHEAD or DETAIL table record has an error value (NULL) then the no data should be loaded into the target TARGET1,TARGET 2 or TARGET3. * If the HEADER table record is valid and the SUBHEAD or DETAIL table record also has valid records only then the data should be loaded into the target TARGET1,TARGET 2 and TARGET3. =================================================== HEADER COL1 COL2 COL3 COL5 COL6 1 ABC NULL NULL CITY1 2 XYZ 456 TUBE CITY2 3 GTD 564 PIN CITY3 SUBHEAD COL1 COL2 COL3 COL5 COL6 1 1001 VAL3 748 543 1 1002 VAL4 33 22 1 1003 VAL6 23 11 2 2001 AAP1 334 443 2 2002 AAP2 44 22 3 3001 RAD2 NULL 33 3 3002 RAD3 NULL 234 3 3003 RAD4 83 31 DETAIL COL1 COL2 COL3 COL5 COL6 1 D001 TXX2 748 543 1 D002 TXX3 33 22 1 D003 TXX4 23 11 2 D001 PXX2 56 224 2 D002 PXX3 666 332 ======================================================== TARGET1 2 XYZ 456 TUBE CITY2 TARGET2 2 2001 AAP1 334 443 2 2002 AAP2 44 22 TARGET3 2 D001 PXX2 56 224 2 D002 PXX3 666 332
What is the use of an aggregator cache file?
How can we get multiple output values using an unconnected lookup transformation?
What is a router transformation?
What is the different lookup cache(s)?
why cant we put a sequence generator or upd strategy transformation before joiner transformation?
Describe an informatica powercenter?
Teradata 
