-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 David,
On 5/23/13 7:40 AM, David kerber wrote: > On 5/23/2013 4:53 AM, Chirag Dewan wrote: >> >> >> Hi All, >> >> I tested Tomcat 7.0.40 with Solaris x86. It gave better CPU >> performance than Tomcat 7.0.30 . It was able to handle 70K >> requests at 45% CPU utilization which is still behind my bench >> mark of 70k requests at 25-30% utilization with Tomcat 6. >> >> >> I also tested with Tomcat 6.0.37 and the results were more or >> less same as Tomcat 6.0.18 >> >> One thing I observed,I ran 3 clients pointing to 3 different >> static HTML pages. With Tomcat 6(both 6.0.18 and 6.0.37) each >> client gave me a concurrency of 48k req/sec at 50-55% CPU >> utilization. However when I ran the same test case for Tomcat >> 7(7.0.40 and 7.0.30) the req/sec were divided b/w the clients and >> the total concurrency was consistent around 70k with 45% >> utilization. Now no matter how many clients I run,the req/sec is >> constant. This is a bit strange. What could possibly be the >> reason? > > Maybe you're saturating the bandwidth or maxing out some other > resource not connected to the tomcats? Or hitting the limit of what Tomcat can actually handle in that environment. I would expect that, at some point, you'll hit a wall where (total) req/sec cannot go any higher no matter which way you adjust the attack (concurrency versus volume-per-client). Are you saying that with 2 clients (c=2) you can get 70K req/sec /per client/ and then also with c=50 you can still get 70K req/sec /per client/ meaning that Tomcat is serving 3.5M req/sec overall? That seems ... unlikely. >> I am not sure I would be able to upgrade to Tomcat 7 under these >> circumstances. Are you saying that Tomcat 7 can't serve your peak load requirements, or that you have some paper benchmarks you want to hit and since you can't hit them, Tomcat 7 is not an option? I'm still not sure why you are terribly concerned with CPU utilization. If you've got the CPU, why not use it? An idle machine is one that is costing you money. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJRnjoYAAoJEBzwKT+lPKRYmPMQALVEineIFqQXf6Wx4EaueozR OtwvQJ/bKIS9//JzUfAt4PmnEykfu0XD4xwzoumtCdLLZjIQNsHXc1M6WCvd+kUU ke4qgRdVJiK58ZKHKNqjEJbknLOm+qHOyNQMzKP3w84lt9kx4Vr/CayhD6YF+pGw o1aDlcWnjnwjJXA4+UWVxmLclFzyby3sC+iMd+Z+zSA5es5vDIU5zlyWDCbWVFv7 bbIEAU81StdSSugalPsSMtxXMUXpIeirOmIvdtJI2pLiuUI6RK0HiMW8IpPzjN3n yxERCLLSh+tupBk8Sb5PozCu1t7GNa24rvcmqP3rH2mFQ8oRVYmu1P0KZqTjL/yw zPBxFip1vTcGOZxiFPA7c9XafW983jcgK2r1Jqxg23R4+sxBeIaCyDuRK9TBtQTn KfgqTUG05SQSoLr67a0+VOjEQZzAU9G2cvAGAYBJU8RJcK1wAn0nO4Xg2Mz9T3fi t2kJCzeNV01SUPkJL5iAGdVO5HVHDvij1CO1OD6O0IqSDmL1RxQw75MyygEqc9GV U41lg5VtbtM3RGLdamJzmIZwSiczzmMW5XIvDFQ9Dc+gubAkScSdh99259KvTCYM 3wEMCBplx0q3jeyBTmNfZ0PvM7GE656GDSLr/KY1QuajBwP97rXsvFx1SDlv6hw7 OG9G6kOYVZQOxe8+mYLO =zEBg -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
