Hi Christopher, I tried to change JBoss to run on port 80 and seems not to work so I will leave a message on JBoss forumabout how that can be accomplished since there have been others having the same issue with 5.1.
I did run a profiler and found out the response time for the ajp connection was 6-7millisecond for the snapshot I took. So bypassing that by using JBoss http directly (without Apache Web Server) seems a valuable test to see if I can meet my goal. Best Regards, -Tony --- On Wed, 10/7/09, Christopher Schultz <ch...@christopherschultz.net> wrote: > From: Christopher Schultz <ch...@christopherschultz.net> > Subject: Re: Tomcat Repsonse question... > To: "Tomcat Users List" <users@tomcat.apache.org> > Date: Wednesday, October 7, 2009, 3:14 PM > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Tony, > > On 10/6/2009 1:32 PM, Tony Anecito wrote: > > I am running JBoss and Apache on the same box so not > sure if the > > TCP/IP stack is bypassed in that case. > > It's not bypassed, but it skips a lot of steps and does > sneaky things > like sharing send and receive buffers to dramatically > reduce the > overhead when communicating with localhost (at least, > decent *NIX TCP/IP > stacks do this... not sure about any others). > > > What I am trying to do is find out where my > bottlenecks are. > > Tomcat itself is unlikely to be a bottleneck, except where > Connectors > are concerned. There are several reasons why the > connector/threads could > be a problem for you: > > 1. Your webapp is not responding quickly enough, resulting > in a pileup > of requests. This is obviously not really Tomcat's fault. > > 2. You have lots of keepalive requests, and the client > takes a long time > to send secondary requests. In this case, consider using > the NIO > connector which doesn't allocate a request processing > thread until a > request has actually been made. > > 3. You don't have enough request processing threads > configured, and you > are simply experiencing more traffic than you expected. In > this case, > your webapp is performing as expected (i.e. well) but you > aren't getting > the throughput you expect because you are simply limited by > your > available thread count. > > If you could explain what you are observing, we might be > able to steer > you toward a particular course of action. > > > In my code I instrument the response time for my web > service and I > > am below 1msec and if visualvm is right more like > 20microseconds > > response time for the method exposed for my web > service. > > That sounds reasonable, especially if you aren't hitting a > database or > you already have some data cached. > > > At my Thick client over the lan I am seeing 3-5msec > response time > > using JBoss 4.2.2. > > So, instrumenting the client gives you 3-5msec for an > observed overhead > of 2-4msec? Are you using SSL or anything like that? Still > localhost? > > > So trying to go from tier to tier to see how fast the > tiers are and > > if there is anything else I can tune. I just updated > to JBoss 5.1.0 > > and am seeing 1msec slower or 4-5msec but have not > tuned it yet > > except for jvm settings. > > Hmm... > > > I am using ajp for the connector. I plan to upgrade my > Apache web > > server soon to the latest version hoping for > performance improvement > > for the ajp connector. > > If performance is what you're after, ditch httpd and go > straight to > Tomcat. Do you have a requirement to use httpd our front? > > - -chris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (MingW32) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iEYEARECAAYFAkrNBKgACgkQ9CaO5/Lv0PDfgwCgvgKOLHRAl5+JpS7+aqsFytJN > C+gAnRRnxwliEkVBzYy73l7gpvT3+V0z > =axGy > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
