On Thu, 2009-04-23 at 10:07 +0200, André Warnier wrote: > Craig Main wrote: > > Thanks Andre, > > > > I am using apache to connect to 10 tomcat instances using the ajp > > connector with load balancing and sticky sessions. > > > > Apache: > > Load [r...@lt-webportal-01:~] # /opt/apache/bin/apachectl -V > > Server version: Apache/2.2.9 (Unix) > > Server built: Sep 6 2008 15:33:44 > > Server's Module Magic Number: 20051115:15 > > Server loaded: APR 1.3.0, APR-Util 1.3.0 > > Compiled using: APR 1.3.0, APR-Util 1.3.0 > > Architecture: 64-bit > > Server MPM: Prefork > > threaded: no > > forked: yes (variable process count) > > Server compiled with.... > > -D APACHE_MPM_DIR="server/mpm/prefork" > > -D APR_HAS_SENDFILE > > -D APR_HAS_MMAP > > -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled) > > -D APR_USE_SYSVSEM_SERIALIZE > > -D APR_USE_PTHREAD_SERIALIZE > > -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT > > -D APR_HAS_OTHER_CHILD > > -D AP_HAVE_RELIABLE_PIPED_LOGS > > -D DYNAMIC_MODULE_LIMIT=128 > > -D HTTPD_ROOT="/opt/http-2.2.9" > > -D SUEXEC_BIN="/opt/http-2.2.9/bin/suexec" > > -D DEFAULT_PIDLOG="logs/httpd.pid" > > -D DEFAULT_SCOREBOARD="logs/apache_runtime_status" > > -D DEFAULT_LOCKFILE="logs/accept.lock" > > -D DEFAULT_ERRORLOG="logs/error_log" > > -D AP_TYPES_CONFIG_FILE="/opt/etc/httpd/mime.types" > > -D SERVER_CONFIG_FILE="/opt/etc/httpd/httpd.conf" > > > > Tomcat: apache-tomcat-6.0.18 > > > > Platform: CentOS 5.2 64bit > > > > > > The problem points to the ajp connection as we have done the following > > tests: > > > > 1) Load tested http with our static content. - Good Response times > > 2) Load tested with the tomcat ajp load balancing to 10 tomcat > > instances: > > * When we test the site's static content, the speed is fine > > * When we test the site's pages that go to tomcat, we see the > > same page returning sometimes fast, and other times slow. > > * If we test connecting to the tomcat via it's http connector > > from the command line, the speed is fine under load. > > * If we test connecting to the apache requesting the tomcat > > pages, some of the requests are returned quickly, others are slow. > > 3) At first we thought it could be an specific instance of Tomcat, but > > on investigation, one request to a particular instance was fast, and > > others we slow to the same instance. > > > > Please let me know if you need more information. > > > I believe that will do fine. > ;-) > > Just another question, because someone is bound to ask : would it be an > option for you to test with mod_jk instead of mod_proxy_ajp as a > connector on the httpd side, and compare the results ? > Not to say that one or the other is better, but mod_jk has been there > longer, and is probably more mature. And it would help circumscribing > the issue. >
This is what we are currently looking into. Will let you know when we have results on that. Thanks Craig > --------------------------------------------------------------------- > The official User-To-User support forum of the Apache HTTP Server Project. > See <URL:http://httpd.apache.org/userslist.html> for more info. > To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org > " from the digest: users-digest-unsubscr...@httpd.apache.org > For additional commands, e-mail: users-h...@httpd.apache.org > To read FirstRand Bank's Disclaimer for this email click on the following address or copy into your Internet browser: https://www.fnb.co.za/disclaimer.html If you are unable to access the Disclaimer, send a blank e-mail to firstrandbankdisclai...@fnb.co.za and we will send you a copy of the Disclaimer.
