Apache Log4J Core framework performance optimization and best practice

The Apache Log4J Core framework is a common Java log record library that is widely used in various applications and systems.Like any other framework, performance optimization and best practice are very important for the effective operation of log4j core.This article will introduce some skills and best practice to improve the performance of the LOG4J CORE framework. 1. Use asynchronous loggers: The LOG4J Core framework provides the function of the asynchronous log recorder. By putting the log request into a queue, and then asynchronous processing logs in the background thread, it improves performance.You can use <asynclogger> in the log4j2.xml configuration file to enable the asynchronous log recorder.For example: <AsyncLogger name="com.example.app" level="info"> <AppenderRef ref="console"/> </AsyncLogger> 2. Configure log recorder level: In the production environment, only important log information can improve performance.Set the log recorder level to the appropriate value to avoid unnecessary log messages.You can configure the log recorder level by setting <Logger> in the log4j2.xml configuration file.For example: <Logger name="com.example.app" level="info"> <AppenderRef ref="console"/> </Logger> 3. Enable the asynchronous IO (ASYNCHRONOUS IO): Configure the log output of log4j core to asynchronous IO to improve performance.You can use <async = "TRUE"> in the LOG4J2.XML configuration file to enable the asynchronous IO.For example: <Appenders> <Console name="console" target="SYSTEM_OUT"> <PatternLayout pattern="%m%n"/> <Async="true"/> </Console> </Appenders> 4. Configure log event filter: You can filter out unrelated log events before the log record can be filtered before the log record can improve performance.You can use the <filters> element to start defining one or more filters and add them to the log recorder or additional.For example: <Appenders> <Console name="console" target="SYSTEM_OUT"> <PatternLayout pattern="%m%n"/> <Filters> <ThresholdFilter level="WARN" onMatch="DENY" onMismatch="ACCEPT"/> </Filters> </Console> </Appenders> 5. Pattern layouts: LOG4J Core framework defaults to use a simple text format by default, but you can configure the format of the logo output through the configuration encoding mode.You can use <PatternLayout> to set the specific encoding mode.For example: <Appenders> <Console name="console" target="SYSTEM_OUT"> <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/> </Console> </Appenders> By following these performance optimization and best practice, you can improve the performance of the Apache Log4J Core framework and make it more effectively record and manage the log information of the application.