Comments below.
At 18:05 04.09.2002 -0700, sk k wrote: >Hi, > >I did the test with AsyncAppender using an xml config >file(set the buff size to 1000 even though default >size of 128 should be sufficient. My logger uses a >size of like 60 ) and it seems the performance isn't >any better. Infact the performance dropped a little >and it seems to vaildate the AsyncAppender performance >numbers shown in the javadocs. > >Pls let me know if anything is wrong or needs to be >tuned. > >config file: >============= > ><log4j:configuration >xmlns:log4j="http://jakarta.apache.org/log4j/"; >debug="true" > > > <appender name="dest1" >class="org.apache.log4j.RollingFileAppender"> > <param name="File" >value="c:/skk/cps/logger/test/test1.log"/> > <param name="MaxFileSize" value="4MB"/> > <param name="MaxBackupIndex" value="2"/> > <layout class="org.apache.log4j.TTCCLayout"/> > </appender> > > <appender name="dest2" >class="org.apache.log4j.RollingFileAppender"> > <param name="File" >value="c:/skk/cps/logger/test/test2.log"/> > <param name="MaxFileSize" value="4MB"/> > <param name="MaxBackupIndex" value="2"/> > <param name="BufferSize" value="1000"/> > <layout class="org.apache.log4j.TTCCLayout"/> > </appender> > > <category name="ut.log.Log4jPerfTest" >additivity="false"> > <priority value="debug"/> > <appender-ref ref="dest2"/> > </category> > > <root> > <priority value="DEBUG"/> > <appender-ref ref="dest1"/> > </root> ></log4j:configuration> > >I am measuring the time when the method starts and > and when it returns and it seems that > the background task time is not accounted for using >my logger and it is accounted for while using log4j. > >It seems that application shouldn't wait till the log >message has been written as it would degrade >peformance . The above configuration XML script does not use nor mention AsyncAppender. Try the following <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"> <log4j:configuration debug="true" xmlns:log4j="http://jakarta.apache.org/log4j/"; > <appender name="ASYNC" class="org.apache.log4j.AsyncAppender"> <param name="BufferSize" value="20000"/> <appender-ref ref="dest1" /> </appender> <appender name="dest1" class="org.apache.log4j.FileAppender"> <param name="File" value="c:/skk/cps/logger/test/test1.log"/> <layout class="org.apache.log4j.TTCCLayout"/> </appender> <root> <priority value="DEBUG"/> <appender-ref ref="ASYNC"/> </root> </log4j:configuration> You may want to post the Java code that takes the measurements. -- Ceki TCP implementations will follow a general principle of robustness: be conservative in what you do, be liberal in what you accept from others. -- Jon Postel, RFC 793 -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
