https://community.hpe.com/t5/operating-system-hp-ux/tmpc-how-to/m-p/3400950#M200797 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.<BR /><BR /><BR />Pete Fri, 15 Oct 2004 06:47:01 GMT Pete Randall 2004-10-15T06:47:01Z https://community.hpe.com/t5/operating-system-hp-ux/tmpc-how-to/m-p/3400949#M200796 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.<BR />Any one can give me the formular or document?<BR />Thank Fri, 15 Oct 2004 06:37:26 GMT https://community.hpe.com/t5/operating-system-hp-ux/tmpc-how-to/m-p/3400949#M200796 Nguyen Anh Tien 2004-10-15T06:37:26Z https://community.hpe.com/t5/operating-system-hp-ux/tmpc-how-to/m-p/3400950#M200797 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.<BR /><BR /><BR />Pete Fri, 15 Oct 2004 06:47:01 GMT https://community.hpe.com/t5/operating-system-hp-ux/tmpc-how-to/m-p/3400950#M200797 Pete Randall 2004-10-15T06:47:01Z