I am trying to understand the relationship between applications in Tomcat, the number of Tomcat processes, Apache mod_jk and the number of threads.
For instance on a system I have the following Apache 1.3.28, Tomcat 4.1.27, Java 1.4.2_02 I use the follow commands to see what is listening to different ports to get an idea of what process or threads are running. Apache: lsof -i tcp:80 | wc -l This gives me 12 processes listening to port 80 (I checked these are related to the number of Apache instances) Tomcat direct port: lsof -i tcp:8080 | wc -l This gives me 50 process that also correspond to the number of tomcat instances running(i.e. the number of java instances I see in ps ) Tomcat mod_jk port: lsof -i tcp:8009 | wc -l gives me 550 I have included my condensed jk.properties and workers.properties files at the end if that may help. Now I now that these numbers will change depending on load but I am trying to understand the relationship. So my questions is how do the numbers relate to each other? How does this effect performance? How could I tune these numbers? Now I have a vague understanding of how these relate but the numbers don't add up for me. I have read the docs and searched for quite a while for a better description. Thanks FILE: jk.properties ############################################################################ ####### LoadModule jk_module libexec/mod_jk.so JkWorkersFile /usr/local/tomcat/conf/workers.properties JkLogFile /usr/local/tomcat/logs/mod_jk.log JkLogLevel info JkLogStampFormat "[%a %b %d %H:%M:%S %Y] " JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories JkRequestLogFormat "%w %V %U %T %b" ## /examples1 Alias /examples1 /usr/local/tomcat/webapps/examples1 <Location "/examples1/WEB-INF/"> AllowOverride None deny from all </Location> JkMount /examples1/* worker1 ## /ctrials Alias /ctrials /usr/local/tomcat/webapps/ctrials <Location "/ctrials/WEB-INF/"> AllowOverride None deny from all </Location> JkMount /ctrials/* worker1 ## /syndication Alias /syndication /usr/local/tomcat/webapps/syndication <Location "/syndication/WEB-INF/"> AllowOverride None deny from all </Location> JkMount /syndication/* worker1 ## /fellowship Alias /fellowship /usr/local/tomcat/webapps/fellowship <Location "/fellowship/WEB-INF/"> AllowOverride None deny from all </Location> JkMount /fellowship/* worker1 ## /test Alias /test /usr/local/tomcat/webapps/test <Location "/test/WEB-INF/"> AllowOverride None deny from all </Location> JkMount /test/* worker1 # All jsp go to worker1 JkMount /*.jsp worker1 # All servlets goes to worker1 JkMount /*/servlet/ worker1 ############################################################################ ## FILE: workers.properties ############################################################################ ## # Define some properties workers.apache_log=/usr/local/apache/logs/ workers.tomcat_home=/usr/local/tomcat workers.java_home=/usr/local/java/ ps=/ # Define workers worker.list=worker1 worker.worker1.type=ajp13 worker.worker1.host=localhost worker.worker1.port=8009 worker.worker1.lbfactor=1 #worker.worker1.cachesize=10 #worker.worker1.cache_timeout=300 worker.worker1.socket_keepalive=1 worker.worker1.socket_timeout=300 # how many ms to wait for PONG after sending a PING for connection worker.worker1.connect_timeout=2000 # how many ms to wait for PONG after sending a PING before posting data worker.worker1.prepost_timeout=2000 # how long to wait for a reply after sending data before server considers connection dead worker.worker1.reply_timeout=1800000 ############################################################################ ## --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
