Kernel Versions

The following table describes the updates in each kernel version of RDS for MySQL database proxy.

Version	Description
2.23.09.002	Resolved issues Optimized the logic for the proxy to retry service SQL statements after the instance breaks down.
2.23.09.001	Resolved issues Fixed the issue that an error is occasionally reported during execution of the prepared SELECT FOR UPDATE statement.
2.23.09.000	New features Change User protocol Parsing of multiple hints show processlist and kill commands
2.23.06.001	Resolved issues Resolved the increased backend database connections caused by enabling session connection pool.
2.23.06.000	New features Binlog pulling through the proxy kernel Resolved issues Optimized the performance of the prepare stmt protocol again.
2.23.02.007	Resolved issues Optimized the performance of the prepare stmt protocol. Resolved unexpected traffic allocation of the */ FORCE_SLAVE/ Hint* statement. Resolved the issue that the set autocommit setting is synchronized to read replicas after transaction splitting is enabled.
2.23.02.000	New features Global consistency Resolved issues Optimized the database proxy performance.
2.22.11.000	New features Multi-statement processing modes Resolved issues Optimized the error messages reported during SQL statement execution in some scenarios.
2.22.07.000	New features Session-level connection pooling Dynamic load balancing Resolved issues Optimized the logic for setting session-level transaction isolation levels of database proxies. By default, the transaction isolation levels are synchronized with those of the database.
2.7.5.0	Application Lossless and Transparent (ALT)
2.7.4.0	New features A query for more than 16 MB of data Resolved issues Optimized the way how metrics of read-only proxies are collected by Cloud Eye.
2.3.9.8	New features Batch execution of prepared statements
2.3.9.7	New features Support for MySQL 8.0 Transaction splitting Read-only mode Resolved issues Optimized the execution logic of prepared statements to improve performance.
2.3.9.0	New features Added database proxy metrics Front-End Connections Created per Second, Transaction Queries per Second, and Multi-Statement Queries per Second. For details, see Table 2. Resolved issues Optimized the database proxy performance. Resolved traffic congestion occurring when your applications connect to database proxy over short connections.
2.3.8.0	New features Real client IP addresses can be obtained through database proxies. Resolved issues Fixed the issue that monitoring data of database proxy is inaccurate. Shortened the downtime of database proxies during a primary/standby switchover.
2.3.6.0	Fixed the issue of connection failures caused by database overload. Improved proxies' compatibility with MySQL protocols.
2.3.1.0	Maintaining connectivity between clients and database proxies. Monitoring metrics of database proxies. For details, see Table 2.