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Re: Optimize multiple writes on the same row
Posted by: Francis Page
Date: March 16, 2012 05:31AM

To answer your last question, we have lots of inserts in the first weeks of the life cycle, then mainly updates. There are no deletes. I would say that we have 1000s of inserts/updates per second (I don't have the real numbers right now).

The real problem is that a lot of simultaneous queries are updating the exact same data in the database. As this data is locked every time it's written to, the queries can't be executed simultaneously: they have to wait for each other to update the sum. That have a huge impact on the performance.

I'm not familiar with the triggers, but I don't think it will prevent this problem, but maybe I just don't understand how they work.

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Re: Optimize multiple writes on the same row
March 16, 2012 05:31AM

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