Would you please let me know when you publish the page on the tips and tricks?
greatly appreciated. HT. Mauricio Nuñez wrote: >El Martes 15 Enero 2002 10:45, Laurent Féral-Pierssens escribió: > >>Hi, >> >>We've been experiencing problems with stability recently. Every 2 weeks, >>Tomcat crashes with 500 errors. We now have more information about what >>happened the last time. >> >>Our configuration is: >>Tomcat 3.2.4 with Apache 1.3.20 and mod_jk >>Linux Debian, PIII 1 GHz, 512 Megs of RAM, Raid 1 >> >>Basically there is only one webapp on the server that has a daily load of >>40 000 Hits or 5 000 page views. >> >>In the logs of Apache we've discovered that someone was using Htdig to >>index the site, basically making one call every 5 sec for 45 minutes. >>That's were and when tomcat crashes. >> >>So my questions, should I ugrade the server's hardware? Would Tomcat 4 >>series be more stable? or would it be just a tomcat configuration problem? >> >>Thanks in advance for your help and advice! >> >>Laurent >> > >Hi. > >I used a similar configuration, and migrating from Tomcat 3.2.4 to 3.3, I get >a much better performance. > >Tips : > >1) About Tomcat + Apache + Linux > >Upgrade also the mod_jk to support chunked input. >Check the max_threads variable on /proc/sys/kernel/max_threads. It's your >upper limit. >Then check the MaxClients variable in apache httpd.conf >Next, check the MaxThreads parameter of yout connector. This must to be >greater than the prev MaxClient. >MaxClient + MaxThreads must to be lesser than kernel max_threads. >Also, Tomcat 3.3 stable had a bug about the MaxTheads of the connector. >That's fixed in Tomcat 3.3.1-dev. > >2) About JDK > >Check your JDK. By default, max memory used for sun jdk is 64m. Try the -Xmx >variable , and try also the -Xms variable. Use the HotSpot Server option, and >Incremental garbage. >Try JRockit or TowerJ. > >Example : ( TOMCAT_OPTS="-server -Xms256m -Xmx256m -Xincgc" ) > >3) Do benchmarking. > >I'm using ab ( ApacheBench). >Check your kernel variables. >check and modify /proc/sys/vm/bdflush ( At your risk ! :-) >use hdparm. > >4) >Check http://www.volano.com/report >Check http://www.segel.com/10k >Check http://www.jlinux.org > >I will publish a page with diferents tips or tricks and bechs > >Bye > >> >> >> >> >>-- >>To unsubscribe: <mailto:[EMAIL PROTECTED]> >>For additional commands: <mailto:[EMAIL PROTECTED]> >>Troubles with the list: <mailto:[EMAIL PROTECTED]> >> > >-- >To unsubscribe: <mailto:[EMAIL PROTECTED]> >For additional commands: <mailto:[EMAIL PROTECTED]> >Troubles with the list: <mailto:[EMAIL PROTECTED]> >
