> From: André Warnier [mailto:a...@ice-sa.com] > Subject: Re: Allocated memory and VMWare > > I may be mistaken, but I do not know of any OS which is capable to run > with a variable (dynamic) amount of memory. The amount available is > usually set when the OS boots, and does not change after that.
In the UNIX/Linux/Windows world, you're correct, but a mature OS is quite capable of dynamically resizing and moving real memory on the fly. Our proprietary OS (which does have a JVM) has been doing it for over 35 years. Our customers depend on the capability in order to run for years between reboots. > I am not the ultimate VMWare expert (yet) (and this is not the right > forum for that either), but personally I would never configure a VMWare > server in such a way that the total RAM of the virtual machines really > running inside it, exceeds the real RAM available on the physical > machine (minus what the underlying OS and VMWare themselves need). Unfortunately, that's how all the cloud and other virtualized environments work - there is massive oversubscription of both memory and CPU, resulting in some "interesting" performance analysis. > RAM is cheap. But virtual RAM is expensive - check out some of the ridiculous cloud pricing options currently available. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
