What is MariaDB 5.5 - Source

<<style class="greenbox" style="text-align:center;font-family:Droid Sans;font-weight:bold;font-size:1.2em;">> [[http://downloads.askmonty.org/mariadb/5.5|Download MariaDB 5.5]] <</style>> <<style class="bluebox" style="text-align:center;font-size:0.8em;font-family:Droid Sans;">> MariaDB 5.5.23-stable (GA) [[mariadb-5523-release-notes|Release Notes]] | [[mariadb-5523-changelog|Changelog]]\\ MariaDB 5.5.22-rc [[mariadb-5522-release-notes|Release Notes]] | [[mariadb-5522-changelog|Changelog]]\\ MariaDB 5.5.21-beta [[mariadb-5521-release-notes|Release Notes]] | [[mariadb-5521-changelog|Changelog]]\\ MariaDB 5.5.20-alpha [[mariadb-5520-release-notes|Release Notes]] | [[mariadb-5520-changelog|Changelog]]\\ <</style>> <<toc>> MariaDB 5.5 is mostly [[what-is-mariadb-53|MariaDB 5.3]] + MySQL 5.5, with a few added features. == Feature Comparison Matrix We have created an [[optimizer-feature-comparison-matrix|Optimizer Feature Comparison Matrix]] showing the new optimizer features in MariaDB 5.5 and 5.3 compared to MySQL 5.5 and 5.6. == New features * Significantly more efficient [[thread-pool-in-mariadb-55|thread pool]], comparable in functionality to the closed source feature in MySQL Enterprise. * [[non-blocking-client-library|Non-blocking client API Library]] (MWL#192) * [[selectively-skipping-replication-of-binlog-events|@@skip_replication option]] (MWL#234) * [[sphinxse|SphinxSE]] updated to version 2.0.4. * "extended keys" support for XtraDB and InnoDB * New ##[[install-soname|INSTALL SONAME]]## statement * New ##[[limit-rows-examined|LIMIT ROWS EXAMINED]]## optimization. * ##mysql_real_connect()## Changes ** In MySQL, and in MariaDB versions before 5.5.21, ##mysql_real_connect()## removes from the MYSQL object any options set with ##mysql_option()## when it fails. Beginning with MariaDB 5.5.21, options are preserved by a failing ##mysql_real_connect();## use ##mysql_close()##, as normal, to clear them. ** This only has effect if the MYSQL object is reused after a ##mysql_real_connect()## failure (which is unusual). No real-life incompatibilities are expected from this change (it is unlikely that an application would rely on options being automatically removed between connection attempts). * The variables ##replicate_do_*##, ##replicate_ignore_*##, and ##replicate_wild_*## have been made dynamic, so they can be changed without requiring a server restart. See [[dynamic-replication-variables|Dynamic Replication Variables]] for more information. == Minor extensions * Updates to performance schema tables are not stored in binary log and thus not replicated to slaves. This is to ensure that monitoring of the master will not cause a slower performance on all slaves. This also fixes a crash on the slaves. New features are added to [[plans-for-56|MariaDB 5.6]]. == Deprecated / disabled features * [[pbxt-storage-engine|PBXT]] is not anymore in the binary builds/distributions. It's however still in the source distributions and in the source tree. The reason is that PBXT is not actively maintained anymore, it has a few bugs that are not fixed and it's not that much in use.