Answer / swetha

The goal of performance tuning is optimize session
performance so sessions run during the available load window
for the Informatica Server.

Increase the session performance by following.

The performance of the Informatica Server is related to
network connections. Data generally moves across a network
at less than 1 MB per second, whereas a local disk moves
data five to twenty times faster. Thus network connections
ofteny affect on session performance.So aviod twrok
connections.

Flat files: If u'r flat files stored on a machine other than
the informatca server, move those files to the machine that
consists of informatica server.

Relational datasources: Minimize the connections to sources
,targets and informatica server to improve session
performance.Moving target database into server system may
improve session performance.

Staging areas: If you use staging areas u force informatica
server to perform multiple datapasses. Removing of staging
areas may improve session performance.

yoU can run the multiple informatica servers againist the
same repository. Distibuting the session load to multiple
informatica servers may improve session performance.

Run the informatica server in ASCII datamovement mode
improves the session performance. Because ASCII datamovement
mode stores a character value in one byte.Unicode mode takes
2 bytes to store a character.

If a session joins multiple source tables in one Source
Qualifier, optimizing the query may improve performance.
Also, single table select statements with an ORDER BY or
GROUP BY clause may benefit from optimization such as adding
indexes.

We can improve the session performance by configuring the
network packet size,which allows data to cross the network
at one time.To do this go to server manger ,choose server
configure database connections.

If your target consists key constraints and indexes u slow
the loading of data. To improve the session performance in
this case drop constraints and indexes before you run the
session and rebuild them after completion of session.

Running a parallel sessions by using concurrent batches will
also reduce the time of loading the data. So concurent
batches may also increase the session performance.

Partittionig the session improves the session performance by
creating multiple connections to sources and targets and
loads data in paralel pipe lines.

In some cases if a session contains a aggregator
transformation ,you can use incremental aggregation to
improve session performance.

Aviod transformation errors to improve the session performance.

If the session containd lookup transformation you can
improve the session performance by enabling the look up cache.

If your session contains filter transformation ,create that
filter transformation nearer to the sources or you can use
filter condition in source qualifier.

Aggreagator,Rank and joiner transformation may oftenly
decrease the session performance .Because they must group
data before processing it. To improve session performance in
this case use sorted ports option.

Explain what is informatica metadata and where is it stored?

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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Explain the pipeline partition with real time example?

0 Answers   Informatica,

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How to eliminate 1st and last rows from the source and load the inbetween rows.

5 Answers   Syntel,

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I have a text file name x With a text message. Word informatica Is repeated for n number of times. How to count the number of occurrence Of word informatica Of word informatic in this file x.

1 Answers   Wipro,

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If there are more than one sessions running parallel in a worklet, which will be the last session ?

2 Answers  

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what is unit testing?tell me proceedure

0 Answers   L&T, UST,

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define galaxy repository in informatica

0 Answers  

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how to use incremental load?

2 Answers   TCS,

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I have a scenario which load the data frm single source to 2 targets as T1, T2, and T1 have a P.K and T2 have F.K relations. first data has to load in T2, and then data load to T1 if that record exist in T1... how can we acheive it?

2 Answers   Ness Technologies,

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if the column name in sql override is diff from the column name in source qualifier,what is the impact?

5 Answers   TCS,

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we have 6 records in source , i need 2nd record in one target and 5th record in one target or 2nd & 5th record in same target.

8 Answers  

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