TmpC - how to

[Nguyen Anh Tien]

I have to make plan to Upgrade my server (rp5470). I intend to add 2 GB memory. But i do not know how much performance will be improved.
Any one can give me the formular or document?
Thank

[Pete Randall]

First of all, are you sure you need memory? Have you seen any signs of paging/swapping? You should make absolutely certain that your primary constraint is memory and not cpu or i/o. Run "vmstat 1 5" when the system is busiest/slowest and see what the "po" column reports. If "po" is anything other than 0, then you will see significant benefit from additional memory because you are paging and using relatively slow disk in lieu of memory is a definite performance hit. If your "po" number is 0, then you might want to rethink your decision to add memory. A cpu upgrade or an additional cpu might be much more beneficial.


Pete