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External Table Load Very Slow

Posted on 2014-09-15
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Last Modified: 2014-09-15
Dear Experts,

We are using External Tables to load CSV files to Oracle Database  (Oracle 11gR2) on Windows 2008 R2. However, while average load time was 15-20 seconds previously, nowadays it takes even up to 15-20 minutes. The average size of CSV files did not change.

What can be the problem or what can I do to trace the problem?

BR
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Question by:GurcanK
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2 Comments
 
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by:Alexander Eßer [Alex140181]
Alexander Eßer [Alex140181] earned 800 total points
ID: 40322638
What do you mean with "previously"?! Did something change in between?! New hardware, other OS etc...?!
To track the mentioned latency, you could do a session specific trace for that loading and tkprof the results afterwards. Then you might see where this process needs to be tuned or bug-fixed...
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sdstuber earned 1200 total points
ID: 40323229
check the wait events while the load is running.  Ideally you could compare these to activity of old runs that were successful.
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