Loading ...Maximum Memory and CPU limitations for Linux server
You should always aware of maximum amount of memory and maximum number of CPU supported by Linux systems / server.
This is an essential task for making out decisions. You must consider at least AMD and Intel platforms.
Intel x86
- Maximum CPUs: 32 (including logical CPUs)
- Maximum memory: 64GB
- Maximum filesize: 8TB
- Maximum filesystem size (ext3): 16TB
- Maximum per-process virtual address space: 4GB
AMD 64/EM64T
- Maximum CPUs: 64
- Maximum memory: 128GB
- Maximum filesize: 8TB
- Maximum filesystem size (ext3): 16TB
- Maximum per-process virtual address space: N/A
Please note that above are standard maximum limitations and do not get confused with Linux cluster systems, which can scale up to 1,024 CPUS.
For up-to-date information always refer to Linux kernel documentation located at /usr/src/linux/Documentation
I am interested, if some one comes up with Sun Solaris/FreeBSD Maximum Memory and CPU limitations information 
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These limitations are for the “vanilla” (out-of-the-box) Linux system. The values can be tweaked, and single system images up to 1024 dual core CPUs (not clustered) with 4TB RAM, have been created as of last August. Those patches are available as required by the GPL, if you want to run your own large scale system.
Darn…how am I supposed to do anything with only 64 processors? :-\
i do not believe any of these statistics are correct, and i’d like to see your sources.
1. vanilla x86 kernel alone can support 255 cpus, not sure about x86-64 at the moment. there are also patches available to support up to 4096 cpus on a single kernel without clustering.
2. maximum filesize is totally dependent upon the filesystem, just as filesystem size is. linux can support files up to 8 exabytes in size with xfs.
3. x86-64 can support 16 exabytes of RAM, not 128G. we have systems at work running redhat and suse with 32 engineering samples of 8G FBDIMMs (that’s 256G of ram)
And what about the desktop capacity system with ths X86 32-64 Processor?
Remember way back in the day when it was said “who would ever need more than 16 cores in their pc”