http://www.blogjava.net/yangpingyu/archive/2012/04/16/374725.html
摘录如下
perf4j最重要的appender就是AsyncCoalescingStatisticsAppender,它会把一段时间内StopWatch的信息汇总到一个独立的GroupedTimingStatistics日志信息,然后把这个独立的信息传给下游的appenders,比如fileappenders,这样就可以写到文件中去了。也可以传给per4j的其他自定义appenders。
<log4j:configuration debug="false" xmlns:log4j="http://jakarta.apache.org/log4j/">
<!-- Perf4J appenders --> <!-- This AsyncCoalescingStatisticsAppender groups StopWatch log messages into GroupedTimingStatistics messages which it sends on the file appender defined below -->
<appender name="xoa.framework.coalescingStatistics" class="org.perf4j.log4j.AsyncCoalescingStatisticsAppender"> <param name="TimeSlice" value="60000"/> <appender-ref ref="xoa.framework.perfStatsAppender"/> </appender> <!-- 该 appender 用于输出性能统计的汇总结果 --> <appender name="xoa.framework.perfStatsAppender" class="org.apache.log4j.FileAppender"> <param name="File" value="../logs/perfStats.log"/> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%m%n"/> </layout> </appender> <!-- 该 appender 用于输出性能统计的细节 --> <appender name="xoa.framework.perfDetailAppender" class="org.apache.log4j.RollingFileAppender"> <param name="file" value="../logs/perfDetail.log"/> <param name="MaxFileSize" value="200MB"/> <param name="MaxBackupIndex" value="10"/> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%m%n"/> </layout> </appender> <logger name="org.perf4j.TimingLogger" additivity="false"> <level value="INFO"/> <appender-ref ref="xoa.framework.coalescingStatistics"/> <appender-ref ref="xoa.framework.perfDetailAppender"/> </logger>
log4j
http://perf4j.codehaus.org/apidocs/org/perf4j/log4j/package-summary.html
参考:
http://stackoverflow.com/questions/2645670/perf4j-not-logging-correctly
UPDATE:
log4j 使用其JDBCAppender时候,需要使用
19 <layout class="org.apache.log4j.PatternLayout"> 20 <param name="ConversionPattern" value="INSERT INTO LOGS VALUES ('%x','%d{yyyy-MM-dd HH:mm:ss}','%C','%p','%m')"/> 21 </layout>
对下链接的PatternLayout有待了解。
http://www.grepcode.com/file/repo1.maven.org/maven2/log4j/log4j/1.2.15/org/apache/log4j/PatternLayout.java#PatternLayout
另外对log4j怎么从log4j.xml 中读取配置表示一下好奇。