Percona Server 5.1.57-12.8 is now the current stable release in the 5.1 series. It is is based on MySQL 5.1.57.
pwrite(). Bug Fixed: LaunchPad: #764395 / MySQL bug #60788 (A. Kopytov)
innodb_use_purge_threadshas been corrected to
32(maximum number of parallel threads in a parallelized operation). The innodb_purge_thread patch accepted a value up to 64 for the
innodb_use_purge_threadvariable, leading to an assertion failure for greater than the actual maximum. Bug Fixed: #755017 (L. Biveinis)
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