ProxySQL v1.2.2

Release date: 2016-09-02

Performance improvement

Connection Pool: reduced connection pool contention adding a per-thread connection cache. This improve performance for thousands of connections and a very high value of mysql-threads : #644
Logger: minor performance improvement if the Logger is disabled : #644

Monitor: when a read_only check is timing out it is reported in error log : #640
Monitor: monitor tables now reports time in microsecond unixepoch : #659
Monitor: added _us to columns in monitor tables to specific time unit : #650
Compile: slightly improved compiling time
Compile: do not compile examples for libdaemon : #654
Monitor: when a note is lagging, the event is logged as warning and not info
Connection Pool: when a node is shunned, the event is logged as an error
Admin: indented the output of SHOW CREATE TABLE
Doc: updated documentation of Query Processor
Doc: updated documentation of Query Cache
Connection: added connection attributes to connections generated by ProxySQL : #672
Admin: improved defaults in proxysql.cnf
Admin: doubled the default value for mysql-connect_retries_on_failure : #666
General: added support for chkconfig for RHEL and Centos : #675
Admin: scheduler.id is now AUTOINCREMENT

Admin: added new column comment in mysql_servers , mysql_replication_hostgroups , mysql_query_rules and scheduler : #643
Query Cache: added new variable mysql-query_cache_size_MB : #171
Query Cache: query cache metrics are now avaible in stats_mysql_global : #140
Admin: mysql_replication_hostgroups is now configurable via config file : #648
Query Processor: added new variable mysql-query_processor_iterations with a default value of 0 (backward compatible)
Query Processor: if mysql_query_rules.flagOUT is set and mysql-query_processor_iterations is greater than 0, a matching rule will set flagIN and starts processing rules from the beginning up to mysql-query_processor_iterations iterations
proxysql_galera_checker.sh now supports reader and writer hostgroups
proxysql_galera_checker.sh now supports case when the only available node is in Desync
Compile: make now allows to compile without jemalloc . This should be used only for system that do not support it! : #654
Admin: added column active in scheduler : #649
Admin: scheduler is now configurable via config file : #658

Monitor: Galera check scripts were not included in packages
Monitor: if a server is configured as OFFLINE_SOFT in writer_hostgroup, do not try to bring it online : #641
Admin: if config db is not present, config file was not loaded : #617
Connection Pool: disable multiplexing if FLUSH TABLE WITH READ LOCK is executed : #613
Stats: statistics were not avaible for REPLACE commands
Monitor: slaves lagging were not being shunned : #652
Compile: enable backtrace only with glibc : #654
Misc: few minor bug fixes
Admin: scheduler did not load at start time : #665
Compile: failed to compile on Fedora 24 : #671
Monitor: if more than one replication hostgroups exist, monitor will constantly try to reconfigure : #667

Thanks to contributors, in alphabetical order: