proxysql/doc/release_notes/ProxySQL_v1.3.0g.md

ProxySQL v1.3.0 , v1.3.0f v1.3.0g

ProxySQL v1.3.0

Release date: 2016-10-19

Performance improvement

• support for millions of connections. It is also able to handle workloads with hundreds thousands client connections, but only few connections are active. For example, 100k total connections, but only 100 active connections.
• use of pthread_mutex for connection pool
• several performance improvements

Usability improvement

• Packaging: version number now includes commit hash
• Monitor: limit the number of Monitor thread to 16

New features

• EXPERIMENTAL support for proepared statements
• Connection Pool: each MySQL_Thread now has a pair thread, therefore the number of threads executed are mysql-threads x 2 . The second set of MySQL_Threads are responsible to only handle idle connections.
  It also introduced two new global variables and a new global status:
  • mysql-session_idle_ms (default 1000) : when a session is idle for that long, it is moved to a thread responsible to handle idle connections
  • mysql-session_idle_show_processlist (default false) : specifies if idle connections are displayed on SHOW PROCESSLIST or on any query against stats_mysql_processlist
  • Client_Connections_non_idle : returns the number of client connections that are not idle, therefore handled by the main MySQL_Threads and not moved to the second set of MySQL_Threads responsible to only handle idle connections
• Network: add support for IPv6 #726 and #460, thanks to @ton31337
• Connection Pool: support for SO_REUSEPORT, it can be only enabled on the command line with -r or --reuseport at startup
• Query Processor: added new variable mysql-digests_lowercase to always set digest to lowercase #725

Bug fixes

• Query Processor: rules with only digest were matching everything #717
• Query Processor: rules without digest where incorrectly displayed #719
• General: Unix Socket Domain file was not removed at shutdown #714
• MySQL Protocol: upgrade from mariadb-connector-c 2.1.0 to 2.3.1 due to several bugs
• Connection Pool: server is not shunned if max_user_connections is reached for user #737

ProxySQL v1.3.0f

Release date: 2016-10-29
Compared to v1.3.0:

New features

• killed query because of query_timeout returns error 1907 #750
• removes any lower limit for query_timeout (before was 300ms)
• added support for STMT_SEND_LONG_DATA #764
• new customer error codes for Max connect timeout #761 and wiki

Bug fixes

• mysql_query_rules.log not working #723
• clients are disconnected if server is running for less than 8 hours #744
• remove annoying error from Admin when running \s #745
• escaping errors on INSERT INTO stats_mysql_processlist #746
• kill threads were using wrong credentials due to encrypted passwords
• on slow network, client connections could become stall
• session_idle_ms was processed as us instead of ms
• mysql_close was trying to close prepared statements on already closed connection #765

ProxySQL v1.3.0g

Release date: 2016-11-14
Compared to v1.3.0f

New features

• when a connection attempts receive error 1226, retry mechanism is disabled #786
• better support for IPv6
• more verbose message on connection timeout #776
• removed some race conditions during PROXYSQL RESTART
• Access denied message reports source (client) #795
• SHOW TABLES FROM xxx is now sorted #788
• allows rules on proxy_port without proxy_addr #712
• Monitor threads are started without arena cache
• Monitor threads are started with 64KB stack

Bug fixes

• validate mysql state before calling mysql_stmt_free_result() #779
• SHUNNED_REPLICATION_LAG does not stop queries #774
• mysql_servers.comment not loaded at runtime #787
• fixed two memory leak in Monitor , reported in #766 and #796

Others

• upgraded jemalloc from 4.2.1 to 4.3.1
• jemalloc is compiled with --enable-prof
• added few memory sanitizers