Cool! I just want to confirm if the rule is right. My IT guy also does not believe it.
Billy Christopher Schultz-2 wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Evebill8, > > On 2/5/2010 1:08 AM, evebill8 wrote: >> I heard the rule to set the Tomcat's heap size is 2/3 of the memory. > > I agree with Chuck: this sounds like malarkey. Whoever told you that > doesn't know what they're talking about. > > The rule for any Java program is: set the heap to whatever you need to > properly run your program. > > For instance, our production machine has a mere 2GiB of memory and our > main JVM (we run 3 simultaneously) is configured to run with a 192MiB > heap... much less than the "recommended" 1.3GiB heap you stated above. > Our webapp runs very lean in memory and we don't have so many > simultaneous users that we have tons and tons of sessions laying around. > >> We are running Tomcat 5.5 on the 64-bit Linux. The box has 16GB of >> RAM, and we just allocate 8GB to heap. > > Do you even need that much? We only recently raised the heap size from > the default (in our environment) 64MiB heap, where it was running just > fine until our user load increased. > >> If the rule is true, this means I can allow at >> least 10GB to Tomcat, and leave 6GB to the OS. > > If there's nothing else running, the OS can certainly run comfortably in > 6GiB of memory. Your OS ought to fit comfortable in a few /MiB/, let > alone a few GiB. > > - -chris > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.10 (MingW32) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ > > iEYEARECAAYFAktsQ8oACgkQ9CaO5/Lv0PD+dQCeMOJqBETDFKgtzaqZ3NhyFXoP > VXAAoJZ+x/2OtZM8w60arQkl/K6seIFy > =99qv > -----END PGP SIGNATURE----- > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > > > -- View this message in context: http://old.nabble.com/Heap-size-rule-for-Tomcat-5.5-tp27463924p27471824.html Sent from the Tomcat - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
