Very well explained Peter. Thanks a lot. I take a note about the translation. ;)
Peter Crowther wrote: > >> From: HLL [mailto:[EMAIL PROTECTED] >> I have a doubt. How can I determine the optimal number of >> Tomcat servers in >> the same machine to achive the best throughput depending on >> the number of >> cores of the machine? That is, which is the optimal relation >> between number of tomcats and number of cores. > > Measure your application, under your expected load, on your hardware. > There is no other way. > > If your application is well optimised and is not waiting on locks, the > optimal number of Tomcats may be 1. This optimises the cache behaviour of > the cores, as you don't have multiple copies of the same code and data > loaded at different locations and competing for cache lines. Lock > contention, garbage collector behaviour or many other variables could > change that, and make it more optimal to segment your application. If > your machine is large enough to have a memory architecture where some > processors have faster access to some memory, the optimal number of > Tomcats may be one per memory segment - but this will need a *lot* of > analysis and tuning. > > [For future posts to forums: A better English translation may be > "question" rather than "doubt"] > > - Peter > > --------------------------------------------------------------------- > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > -- View this message in context: http://www.nabble.com/Optimal-number-of-Tomcat-instances-versus-Number-of-cores-tp17228866p17229456.html Sent from the Tomcat - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
