How to identify bottlenecks in
sources,targets,mappings,workflow,system and how to
increase the performance?
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Answer Posted / praveenkumar.b
Source:
Create the Filter transformation after all the Source
Qualifiers and make the filter condition FALSE so that the
data will not go beyond this trasformation. Then run the
session and find out the time taken from source. If you
feel there is some lack in performance, then suggest the
necessary index creation in Pre Session.
Note: If the source is File, then there is no possibility
of performance problme in source side
Target:
Delete the target table from the mapping and create the
same structure as a Flat file. Run the session and find out
the time taken to write the file. If you feel problem in
performance, then delete the INDEX of the table before
loading the data. In post Session, Create the same index
Note:If the target is File, then there is no possibility of
performance problme in target side
Mapping:
The below steps need to be consider
#1. Delete all the transformations and make it as single
pass through
#2. Avoid using more number of transformations
#3. If you want to use more filter transformation, then use
Router transformation instead of it
#4. Calculate the index and data cache properly for
Aggregator, Joiner, Ranker, Sorter if the Power center is
lower version. Advance version, Power center itself will
take care of this
#5. Always pass the sorted i/p's to Aggregator
#6. Use incremental aggregation
#7. Dont do complex calculation in Aggregator
transformation.
Session:
Increas the DTM buffer size
System:
#1. Increase the RAM capacity
#2. Avoid paging
| Is This Answer Correct ? | 27 Yes | 1 No |
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