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 does reusable transformation mean?

0 Answers  

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What is the difference between Bulk Load and Normal Load

3 Answers   TCS,

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In how many ways we can create ports?

0 Answers  

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Explain lookup transformation in informatica

0 Answers   Informatica,

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i have a table with name field. i,e name Shankar prabhakar nitikripa so no if a occures 3 times in name then it will go to tgt A if b occures 3 times in name then it will go to tgt b .. if z occures 3 times in name then it will go to tgt z

1 Answers   HCL,

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What are the tuning techniques you applied during your last project

0 Answers  

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In Flat file, I need Header, Footer and No of rows in Last column. How will u achieve in Mapping Level(With out using Session Level Property)?

1 Answers   iNautix,

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What is incremental aggregation and how it is done?

8 Answers   JPMorgan Chase, TCS,

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Why filter transformation is an active one?

0 Answers  

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performance wise which one is better in joiner and lookup transformation?why?explain clearly?

4 Answers   IBM,

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in which situations do u go for scds ?

3 Answers   TCS,

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wat transf shud i use to achieve this id sal id sal sum src-1 20 tgt 1 20 40 1 20 1 20 40 2 15 2 15 35 2 20 2 20 35

2 Answers  

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