Comments on: The good and the bad about bind variables, revisited in 11g ! http://www.pythian.com/news/543/the-good-and-the-bad-about-bind-variables-revisited/ News and views from Pythian DBAs Sat, 20 Mar 2010 10:37:20 +0000 http://wordpress.org/?v=2.8.4 hourly 1 By: LSC http://www.pythian.com/news/543/the-good-and-the-bad-about-bind-variables-revisited/#comment-101286 LSC Mon, 17 Sep 2007 22:17:22 +0000 http://www.pythian.com/blogs/543/the-good-and-the-bad-about-bind-variables-revisited#comment-101286 Hi The new adaptive cursor sharing seems good idea. I have done some tests and it seems that it stops peeking when it reaches a stability. For example if we have a table with 9 values with low cardinality and 1 with high if we start testing from low to high, since 1 to 9 has low cardinality the plan does not change (uses nice index range scan), when we reach to 10 we would expect a FTS but it does not seems to peek anymore and stays with index range scan plan. So not perfect yet... Hi

The new adaptive cursor sharing seems good idea. I have done some tests and it seems that it stops peeking when it reaches a stability. For example if we have a table with 9 values with low cardinality and 1 with high if we start testing from low to high, since 1 to 9 has low cardinality the plan does not change (uses nice index range scan), when we reach to 10 we would expect a FTS but it does not seems to peek anymore and stays with index range scan plan. So not perfect yet…

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