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Twitter Open Sources MySQL Enhancements

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Renegade:
Here's a nice story - Twitter has open sourced some of their enhancements to MySQL. :)  :Thmbsup:

http://www.theregister.co.uk/2012/04/09/twitter_open_sources_mysql_code/

Code the company has released includes what it calls:

* Add additional status variables, particularly from the internals of InnoDB. This allows us to monitor our systems more effectively and understand their behavior better when handling production workloads.

* Optimize memory allocation on large NUMA systems: Allocate InnoDB's buffer pool fully on startup, fail fast if memory is not available, ensure performance over time even when server is under memory pressure.

* Reduce unnecessary work through improved server-side statement timeout support. This allows the server to proactively cancel queries that run longer than a millisecond-granularity timeout.

* Export and restore InnoDB buffer pool in using a safe and lightweight method. This enables us to build tools to support rolling restarts of our services with minimal pain.

* Optimize MySQL for SSD-based machines, including page-flushing behavior and reduction in writes to disk to improve lifespan.
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+1 for Twitter there!

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