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11.13.2007 at 09:46PM PST, ID: 22959250
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Need to improve performance of Oracle APIs running against data staging tables

Tags: oracle, staging, performance, improve, load
We have a ETL process moving a flat file into Oracle staging tables. The table has approx 1000000 records. These records then need to be loaded into Oracle E-Business suite CRM using APIs. It seems that the process of getting the file loaded into Oracle is not the problem, rather the process of the TCA APIs loading the data to the system.

Does anyone have any thoughts on how the load process time can be reduced - currently against a virtual machine, it is taking up to 18 hours. When other processes were stopped during the load process, this time was reduced by about 5 hours.

Help is appreciated.
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Question Stats
Zone: Database
Question Asked By: jainesteer
Solution Provided By: Akenathon
Participating Experts: 2
Solution Grade: A
Views: 0
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11.14.2007 at 01:48AM PST, ID: 20278642

Rank: Wizard

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11.14.2007 at 02:54AM PST, ID: 20278889

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11.14.2007 at 05:37AM PST, ID: 20279668

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11.14.2007 at 05:40PM PST, ID: 20285889

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11.18.2007 at 03:11PM PST, ID: 20309414

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11.14.2007 at 01:48AM PST, ID: 20278642

Rank: Wizard

may be API's which are in place have a lot of validations to be performed before the data loading starts.

can you check on this and do u have access to the code of those API's ?

Thanks

 
11.14.2007 at 02:54AM PST, ID: 20278889
I am just new in the role and will need to confirm this. It will be at least 12 hours until I can respond to this.
 
11.14.2007 at 05:37AM PST, ID: 20279668
The difference in elapsed times suggests you are short of server resources. Take OS level metrics on CPU, RAM, I/O, etc. to confirm my suspicion, but if you are short of CPU you will have to tune the code...

One typical CPU killer is lack of bind variables usage, especially when you are constantly repeating the same SQL as you probably are. If that's that case, you can set cursor_sharing=force while you do your thing, run this in the SAME DB connection, right before firing your job:

alter session set cursor_sharing=force;

Alternatively, you can do it for every session while you run it, just change "alter session" to "alter system"... but this is no silver bullet, you need to understand the problem deeply IMHO
Accepted Solution
 
11.14.2007 at 05:40PM PST, ID: 20285889
I am trying to get this code added to the load program. Also, on the APIs, I am not sure if they are looking to make significant changes to the code. Still looking into it.

Thanks so far
 
11.18.2007 at 03:11PM PST, ID: 20309414
Thanks - applying the alter session code to the load has now taken the time from 13 hr to 5 hr, and this is all that was needed.

Excellent.
 
 
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