[c-nsp] Reading output of show mem

[Joost greene]

Hello,

On a :

RPM#sh ver | i Ver
Cisco IOS Software, RPM Software (RPM-JS-M), Version 12.3(11)T5, RELEASE 
SOFTWARE (fc1)
ROM: System Bootstrap, Version 12.1(20001003:080040) [swtools-rommon400 
102], DEVELOPMENT SOFTWARE
BOOTLDR: RPM Software (RPM-BOOT-M), Version 12.2(4)T, RELEASE SOFTWARE (fc1)


RPM#sh mem ?
<0-4294967294> Dump memory starting at <address>
allocating-process Show allocating process name
cache Cache setting
dead Memory owned by dead processes
debug Memory debugging commands
failures Memory failures
fast Fast memory stats
free Free memory stats
io IO memory stats
multibus Multibus memory stats
overflow memory overflow corrections
pci PCI memory stats
processor Processor memory stats
statistics Mempool Statistics
summary Summary of memory usage per alloc PC
| Output modifiers
<cr>

I need to know how to make sure we have enough memory for now or in teh next 
few months or if we need to upgrade ?

Which commands should i be looking at and how do i decode its output?