Sun.Jun 13, 2021

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Memoization in Cost-based Optimizers

DZone

Query optimization is an expensive process that needs to explore multiple alternative ways to execute the query. The query optimization problem is NP-hard , and the number of possible plans grows exponentially with the query’s complexity. For example, a typical TPC-H query may have up to several thousand possible join orders, 2–3 algorithms per join, a couple of access methods per table, some filter/aggregate pushdown alternatives, etc.

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Choosing a Custom Software Development Company That Delivers: 11 Key Factors To Account For

DZone

Finding the right custom software development company that delivers is a complex challenge. It is like hiring a crew to build your new house. Triple check with whom you will work with over the next few months or years as it has a direct impact on your success or failure. As we know at the heart of every successful organization is a quality custom software solution, therefore we decided to create a guide with key factors on how to choose a custom software development company that delivers.

Software 113
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An End-to-End Guide to Load Testing

DZone

If you have a public-facing web application, the odds are you should probably be thinking about load testing. Any tester can (and should) add load testing to their repertoire. Functional tests are often carried out with a single user’s experience of your application in mind, but what happens when hundreds or thousands of users are on your site at the same time?

Testing 241