Have a box hosting some stuff, has 192gig of ram.
The OS see's all the ram. However it will only use half of the ram, the 2nd half just sit unallocated, cache, userspace apps etc. wont use it. When half of the ram is in use swap takes over.
Anyone know of some kind of 96gig linux bottleneck? or a scenario that would cause linux to recognise ram but not use it?