If we use only lookup transformation in a mapping ie,
SourceQualifier-->Lookup --> Target. , here datas are taking
very long time to load in target., so what are steps to
improve the performance in that mapping???????
Answers were Sorted based on User's Feedback
Answer / hari
use order by clause in source qualifier.
Remove un necessary ports in that lookup.
try to restrict lookup cache based on the source data.
create order by clause in lookup override using the lookup
condition columns.
If lookup and source are in same database try to join in
source qualifier.
Drop the indiex on the target table before loading the data.
Check index on source table,
Check source table look tables are analysed properly or not.
| Is This Answer Correct ? | 7 Yes | 0 No |
Answer / murali udayagiri
One more point we can add to the first answer.
i.e
Check lookup condition columns are having indexes or not.
If indexes are present check when those are rebuild.Index
snaps are old then rebuild them before going to be start
session.If indexes are not present on conditional columns
just create.
Please let me know if any issues.
Thanks,
Murali Udayagiri
| Is This Answer Correct ? | 1 Yes | 0 No |
Hi I have been asked several times the following questions. 1.How does one do incremnental loading 2.Scenario - You are trying to load reasonable amount of rows into the target table, and its taking a helluva lot of time.What could be the reasons? I hate to answer these tw0 , gives me nightmares to even think of it!!! 3.Tell me any complex situation you have faced( as an Informatica Developer) and how did you resolve it. 4.tell me any complex mapping that you have done. All the experienced people out there , please please, reply to these questions.
How can yoU create or import flat file definition in to the warehouse designer?
How to load dimension and fact in same mapping at same time.explain me the logic used for that scenario.
Hi experts ,I have a Source of 1000 records.I have to load 100 records in first target,101 to 200 records in 2nd target, 201 to 300 records in 3rd target and again 301 to 400 in first target like that as cyclick process. How can i acheive this.
Hello , I am unable to work with SQL transformation at least. Where do i need to give connection for sql transformaton ? At session level there is no property . I have created a SQL Transformation and chosen query mode. But do i need to pass connection information to it ? I don't know where do i need to write a query ? I have written a query in file and that file path i gave in the properties of SQL Transformation. But it is not working. Could any one of you please let know how can i work with SQL Transformation? Advance Thanks.
What is operational data source (ODS)?
What are the types of metadata that stores in repository?
how to duplicates from expression transformation without using sorter before that
Different sorts of metadata that stores in the storage facility?
what are the limitations for bulk loading in informatica for all kind of databases and transformations?
Source table ------------- ID NAME --- ------ 101 PANKAJ NULL KUMAR NULL MATHUR 102 JYOTI NULL SAXENA 103 SACHIN NULL TENDULKAR TARGET TABLE ------------- ID NAME --- ------- 101 PANKAJ KUMAR MATHUR 102 JYOTI SAXENA 103 SACHIN TENDULKAR IN ORACLE & INFORMATICA LEVEL HOW TO ACHIVE
How can we use mapping variables in informatica? Where do we use them?