Answer / mike

The goal of performance tuning is optimizing the session
performance. so session runs during available load window
for the informatica server. To increase the session
performance we need to follow the below steps
1)The performance of the informatica server is related to
the network connections. Generally data moves across the
network at less than 1 mb per second, where as local disk
moves five to twenty times faster. so network connections
aften affect the session performance.Hence avoiding the
network connections session performance gets increased.
2)If your flat files are stored in a machine other than
informatica server, need to move the files where
informatica server exists.
3)By minimizing connection to sources, targets and
informatica server session performance gets increased.
4)By running multiple informatica servers against same
repository, thus distributing the session load on multiple
servers may increase session performance.
5)By running the informatica server in ASCII data movement
mode session performance gets improves this is because,
ASCII mode stores a character value in one byte where as
UNICODE mode stores 2 bytes per character.
6)By avoiding transformation errors session performance
gets increased.
7)If a session having aggregator t/r, we can use
incremental aggregation to improve session performance.
8)If a session having lookup t/r , by enabling lookup
chache session performance gets increased.
9)aggregator, rank, joiner t/r's will always slows down the
data load this is because they must group the data before
processing it. In such case by using sorted input option we
can improve session performance.
10)If your target contains key constraints and indexes, it
may slow down the data load. In such case need to drop the
constraints and indexes and rebild them after completing
the session....

If something was taking much time need to check the
bottlenecks starting from
source,target,transformation,mapping,session,workflow

What is hash partition?

2 Answers  

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How to handle decimal places while importing a flatfile into informatica?

0 Answers  

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in my source table i want to delete first and last records and load in between records into target? how can it possible?

3 Answers   HCL, Thomson Reuters,

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How can you define a transformation? What are different types of transformations in Informatica?

10 Answers  

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There are 4 flat files with number of records as indicated below. Which files should be picked first for joining using joiners so as to get best performance. File A - 1000 records File B - 100 records File c - 10000 records File D - 10 records Please explain. Thanks and Regards,

1 Answers   Amdocs,

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what is mean by complex business rule ?

0 Answers   Cap Gemini,

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What are the options in the target session of update strategy transsformatioin?

2 Answers  

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What happen if you have 3 ports in SQ and 4 ports in SQL override of SQ( provided all ports are in same order and they are connected with proper source and target)? Also what happens when I have 4 ports and will extract 3 values in SQloverride.. What will be the value in 4th port ?

0 Answers   CTS,

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Can anyone tell me the new features in Informatica 9 Version?

0 Answers   Syntel,

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Enlist the various types of transformations.

0 Answers  

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HOW TO DELETE A RECORD FROM FLAT FILE

6 Answers   TCS,

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How to use procedural logic inside infromatica?

0 Answers  

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