Emergency

Search Results for: fragmented mysql tables

Improved InnoDB fast index creation

One of the serious limitations in the fast index creation feature introduced in the InnoDB plugin is that it only works when indexes are explicitly created using ALTER TABLE or CREATE INDEX. Peter has already …

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Avoiding Fragmentation with Fractal Trees

Summary B-trees suffer from fragmentation. Fragmentation causes headaches — in query performance and space used. Solutions, like dump and reload or OPTIMIZE TABLE are a pain and not always effective. Fractal trees don’t fragment. So …

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Tools

This page contains links to various tools we found helpful to use in practice. Some tools are written by us, others by third parties, yet another ones may be shipped with your operating system you …

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Working with many files and file system fragmentation

Working on performance optimization project (not directly MySQL related) we did a test – creating 100 files writing 4K in the random file for some time and when checking the read speed on the files …

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Heikki Tuuri answers to Innodb questions, Part II

I now got answers to the second portions of the questions you asked Heikki. If you have not seen the first part it can be found here. Same as during last time I will provide …

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