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antognini.ch | ||
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iggyfernandez.wordpress.com
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| | | | | Dear NoCOUG members and friends, The golden rule of not tuning SQL is "operate with as little information as possible." Not only will this increase your chances of failure but it will make it difficult for others to help you. Every exercise in problem solving - no matter how little - has exactly six stages:... | |
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jonathanlewis.wordpress.com
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| | | | | I've discussed the capabilities of the dbms_xplan package in a couple of posts already; and shown how useful it can be in two examples: understanding a problem with filter subquery selectivity and understanding why some Cartesian merge joins were appearing unexpectedly. Let me make a crucial point about execution plans (again): if you have a... | |
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mauro-pagano.com
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| | | | | Most of the overall database performance issues (not caused by SQL tuning) are prettycomplex to setup because they require a workload and it takes quite some work to reproduce concurrency in a test environment where at best you got a couple folks testing some new code. Nowadays there are ways to reproduce a realistic workload... | |
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jonathanlewis.wordpress.com
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| | | Just a few notes about contributing. Please check the details about tags and formatting at the end. Wordpress does some odd things with comment text. Delayed comments The blog is protected by Akismet, which tries to identify spam. As a consequence it is possible that a comment you post will not appear because it has... | ||
