This is semi-off topic but does have a mod_perl angle and since Larry Wall is an active member here and wrote the torture script, I'm hoping he can offer some advice. I have setup our corporate Web server with 2 httpd binaries, one with and the other without mod_perl, each bound to a different IP. We are currently using Concentric for our hosting and I was curious to see how our new box performed compared to Concentric. Both servers have duplicate files from our Web site so I ran the torture script and it turned out that Concentric was 100% faster, but what bothered me was that the Bytes transfered from our mod_perl box was 3 times as much. And the transfer rate was quite faster as well (100Kbps compared to 20Kbps). All I was testing was our main index.shtml which has a few include statements, but againm it's identical on both servers. At first I though this could mean that my mod_perl httpd binary was sending more info, so I compiled an httpd binary with no mod perl just for .html and image files. I also created a very simple .shtml file with nothgin more than a head/body and a line of text. A second test for both servers revealed my new binary was twice as fast this time but now the Bytes transfered had duplicated on teh Concentric side. To make this clear, here is the results: ----- [root@rollercoaster /tmp]# ./torture.pl -t 100 -c 10 http://www.tradiant.com/test.shtml ** torture.pl version 1.05 starting at Fri Feb 11 15:43:43 2000 Transactions: 1000 Elapsed time: 64.579 sec Bytes Transferred: 1112000 bytes Response Time: 0.54 sec Transaction Rate: 15.48 trans/sec Throughput: 17219.28 bytes/sec Concurrency: 8.4 Status Code 200: 1000 ** torture.pl version 1.05 ending at Fri Feb 11 15:44:48 2000 [root@rollercoaster /tmp]# ./torture.pl -t 100 -c 10 http://beta.tradiant.com/test.shtml ** torture.pl version 1.05 starting at Fri Feb 11 15:45:28 2000 Transactions: 1000 Elapsed time: 33.840 sec Bytes Transferred: 90000 bytes Response Time: 0.19 sec Transaction Rate: 29.55 trans/sec Throughput: 2659.56 bytes/sec Concurrency: 5.5 Status Code 200: 1000 ** torture.pl version 1.05 ending at Fri Feb 11 15:46:02 2000 ----- Please note that the testing was done on an independant machine on 1.5Mbit SDSL, so the test was not biased towards one server or the other. I shoudl also state that the mod_perl httpd binaries had a total time of 110 seconds, which is quite an increase versus the non mod_perl binary. Anyhow, does anyone have an explination for the difference in Bytes transfered? Jim
