Hi All,
I have a mapping which performs sqloveride in sourcequalifier and then route to expression transformation and from there route to 5 filter transformation to target table T1. The related session is taking 18 mins to load. I want to reduce overall load time.. I saw that sqloveride just take a second to execute and start loading to table so there is no source bottleneck. I have replaced 5 filter to single router transformation in mapping but no performance enhance .I think the bottleneck is at target table. I am performing update else insert in mapping. The target table t1 has 5 primary keys and each key has a unique index on it.The index is on following cols- acctg_date,prod_code,balbo
_code. Can anyone please advise me on how can I tune target table to reduce the load time.
The target table t1 contain about 4.7 million records.Thanks
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You can split the stream of mapping as update and insert. Update stream would check for existence of record in both source and target (based on primary key combination) to update the target table via PK. Tghe insert stream would check for non-existence of record in target and do a insert. This might improve performance reducing overahead on Informatica but increases load on database.
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by: nmcdermaidPosted on 2009-05-04 at 19:36:52ID: 24301166
Can you capture some of the SQL that informatica is generating? If not you can always use SQL Profiler to capture it.
You really have two options:
1. Possibly improve indexes to improve update performance (though this will reduce insert performance)
2. Use an exclusive lock on the destination table
I don't know if you can do option 2 from informatica. I assume you can.