MySQL Connector/J 8.0 Release Notes
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The name of a class that implements 'com.mysql.cj.log.Log' that will be used to log messages to. (default is 'com.mysql.cj.log.StandardLogger', which logs to STDERR).
Default Value com.mysql.cj.log.StandardLogger Since Version 3.1.1 -
Name of a class that implements the interface 'com.mysql.cj.log.ProfilerEventHandler' that will be used to handle profiling/tracing events.
Default Value com.mysql.cj.log.LoggingProfilerEventHandler Since Version 5.1.6 -
For profiling/debugging functionality that measures elapsed time, should the driver try to use nanoseconds resolution?
Default Value false Since Version 5.0.7 -
Controls the maximum length of the part of a query that will get logged when profiling or tracing.
Default Value 2048 Since Version 3.1.3 -
Maximum size for a byte array parameter in a prepared statement that is converted to a hexadecimal literal when interpolated by 'JdbcPreparedStatement.toString()'. Any byte arrays larger than this value are interpolated generically as "** BYTE ARRAY DATA **".
Default Value 1024 Since Version 8.0.31 -
Trace queries and their execution/fetch times to the configured 'profilerEventHandler'.
Default Value false Since Version 3.1.0 -
Should queries that take longer than 'slowQueryThresholdMillis' or detected by the 'autoSlowLog' monitoring be reported to the registered 'profilerEventHandler'?
Default Value false Since Version 3.1.2 -
If 'logSlowQueries' is enabled, how long, in milliseconds, should a query take before it is logged as slow?
Default Value 2000 Since Version 3.1.2 -
If 'logSlowQueries' is enabled, 'useNanosForElapsedTime' is set to "true", and this property is set to a non-zero value, the driver will use this threshold, in nanosecond units, to determine if a query was slow.
Default Value 0 Since Version 5.0.7 -
Instead of using 'slowQueryThreshold*' to determine if a query is slow enough to be logged, maintain statistics that allow the driver to determine queries that are outside the 99th percentile?
Default Value true Since Version 5.1.4 -
If 'logSlowQueries' is enabled, should the driver automatically issue an 'EXPLAIN' on the server and send the results to the configured logger at a WARN level?
Default Value false Since Version 3.1.2 -
Should the driver gather performance metrics, and report them via the configured logger every 'reportMetricsIntervalMillis' milliseconds?
Default Value false Since Version 3.1.2 -
If 'gatherPerfMetrics' is enabled, how often should they be logged (in milliseconds)?
Default Value 30000 Since Version 3.1.2 -
Should the driver log XA commands sent by 'MysqlXaConnection' to the server, at the DEBUG level of logging?
Default Value false Since Version 5.0.5 -
Should the network protocol be logged at the TRACE level?
Default Value false Since Version 3.1.2 -
When enabled, a ring-buffer of 'packetDebugBufferSize' packets will be kept, and dumped when exceptions are thrown in key areas in the driver's code.
Default Value false Since Version 3.1.3 -
The maximum number of packets to retain when 'enablePacketDebug' is "true".
Default Value 20 Since Version 3.1.3 -
Should the driver issue usage warnings advising proper and efficient usage of JDBC and MySQL Connector/J to the 'profilerEventHandler'?
Default Value false Since Version 3.1.1 -
If 'useUsageAdvisor' is "true", how many rows should a result set contain before the driver warns that it is suspiciously large?
Default Value 100 Since Version 5.0.5 -
Should the driver dump the SQL it is executing, including server-side prepared statements to STDERR?
Default Value false Since Version 3.1.9