Based on MySQL 5.5.34, including all the bug fixes in it, Percona Server 5.5.34-32.0 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 5.5.34-32.0 milestone at Launchpad.
Percona Server has extended the
SELECT INTO ... OUTFILEand
SELECT INTO DUMPFILEto add the support for UNIX sockets and named pipes.
Percona Server now provides additional information in the slow query log when
log_slow_rate_limitvariable is enabled.
A new variable
slow_query_log_always_write_timehas been introduced. It can be used to specify an additional execution time threshold for the slow query log, that, when exceeded, will cause a query to be logged unconditionally, that is,
log_slow_rate_limitwill not apply to it.
Due to an incompatible upstream change that went in unnoticed, the log tracker thread would attempt to replay any file operations it encountered. In most cases this were a no-op, but there were race conditions for certain
DDLoperations that would have resulted in server crash. Bug fixed #1217002.
apt-get upgradeof Percona Server would fail in post-installation step if server failed to start. Bug fixed #1002500.
libssl.so.6dependency issues in binary tarballs releases. Bug fixed #1172916.
install_layout.cmakecould cause that some library files, during the build, end up in different directories on x86_64 environment. Bug fixed #1174300.
The unnecessary overhead from persistent InnoDB adaptive hash index latching has been removed, potentially improving stability of the Multiple Adaptive Hash Search Partitions feature as well. Upstream bug fixed #70216, bug fixed #1218347.
Building Percona Server with
-DHAVE_PURIFYoption would result in an error. Fixed by porting the
close_socketfunction from MariaDB. Bug fixed #1203567.
Adaptive hash indexing partitioning code has been simplified, potentially improving performance. Bug fixed #1218321.
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