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Announcing Percona Server 5.5.19-24.0

 | January 13, 2012 |  Posted In: MySQL


Percona is glad to announce the release of Percona Server 5.5.19-24.0 on January 13th, 2012 (Downloads are available here and from the Percona Software Repositories).

Based on MySQL 5.5.19, including all the bug fixes in it, Percona Server 5.5.19-24.0 is now the current stable release in the 5.5 series. All of Percona ‘s software is open-source and free, all the details of the release can be found in the 5.5.19-24.0 milestone at Launchpad.

New Features

  • Variable innodb_flush_neighbor_pages can be now set to a new value cont. The previously-available option values 0 and 1 now have more descriptive names none and area. The value of none disables the neighbor page flush and area matches the default InnoDB behavior: any dirty pages in the vicinity of the page selected for flushing may be flushed too. The new option value cont improves the neighbor flushing by considering only contiguous blocks of neighbor pages, thus performing the flush by sequential instead of random I/O. (Yasufumi Kinoshita, Laurynas Biveinis)
  • Improvements to the XtraDB’s sync flush algorithm. If the XtraDB checkpoint age grows dangerously close to its limit and XtraDB is forced to perform a sync flush, these changes should slightly improve the user query performance instead of completely blocking them. (Yasufumi Kinoshita, Laurynas Biveinis)

Bug Fixes

  • Minor MEMORY engine test suite fix: #849921 (Laurynas Biveinis)
  • A fix for testsuite integration into Jenkins: #911237 (Oleg Tsarev)

For this release we also provide EXPERIMENTAL binaries for Mac OS X platform, and you can download tar.gz or dmg there

Laurynas Biveinis

Laurynas is a software engineer and Percona Server lead whose primary interest is InnoDB performance. In the past he worked in industry, interned in Google as a compiler software engineer, as well as academia where he researched physical database indexes, including large-scale spatial models of the brain.


  • Jonathan –

    It was a one-off experimental build for Mac OS X. We might support Mac OS as a first-class binary package platform at some point in the future. OTOH, Percona Server compiled from sources on Mac OS should work just fine, although obviously this packaging option is not as convenient.

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