I'm getting unusual preliminary results on some performance tests against a very simple servlet, and I'd like to see what results other people get. If you're going to run the tests yourself, don't look at my results ahead of time if you can resist (they're at the bottom of the message)
I'm http_load'ing against 4.0.3 and 4.1 HEAD using 8 threads and 0,1,8,16 and 32k response sizes. I ran http_load on one machine and Tomcat on another. I ran a couple rounds before the final test at each response size to let the jit warm things up. The server.xml I used just declares a single HTTP connector and a simple Engine/Host/Context. No logging, valves, etc. The results are preliminary because I haven't done the appropriate system tuning and didn't bother with the proper controls on what was running on my test box, I have a sneaking suspicion I'm a few days out of date on HEAD.etc, etc. Note also that hitting a single URL over and over is a totally bogus way to test "performance", but relative results between different versions of the same software can be interesting. --------------------------------------------------------- public class HelloServlet extends HttpServlet { private static byte[] buf; private static int sz = 32*1024; public void init() throws ServletException { buf = new byte[sz]; for(int i=0; i<sz; i++) buf[i] = 88; // ASCII 'X' } public void doGet(HttpServletRequest req, HttpServletResponse rsp) throws IOException, ServletException { OutputStream ostr = rsp.getOutputStream(); ostr.write(buf); } } ----------------------------------------------------- PRELIM RESULTS MinTC is included for comparison, since it uses the 4.0.3 HTTP connector but attempts to improve the Catalina side of things. It's sort of the converse of the 4.1 Connector improvements. But it's not finished so it's not really a fair comparison. Think of it as an upper bound on where relatively unsophisticated Catalina optimizations can get you. I'm running Linux with kernel 2.4.17, and Java HotSpot(TM) Client VM (build 1.3.1_02-b02). The results are "better" with the server VM, but it didn't look like the startup scripts were running Tomcat that way. All results are in "bogo-cps" (bogus connections-per-second). Note that the idea is not to test against other web servers (except possibly Apache as a baseline), but against versions of Tomcat. The 32k results are saturating the local network. 4.0.3 4.1.X MinTC 0k/8 881 960 1059 1k/8 855 916 1010 8k/8 719 732 767 16k/8 520 533 532 32k/8 319 320 320 Ignore the absolute numbers, yours will be very different. (I'm too lazy to normalize them). I'll hold off on conclusions until I get some feedback about whether other people are getting similiar results (or if my test setup was a little too preliminary) -- Christopher St. John [EMAIL PROTECTED] DistribuTopia http://www.distributopia.com -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>