how to calculate the minimum virtual memory for 1GB ram 32bit-x86?

skaushal_lk · 01-20-2014, 03:56 AM

Hi Gurus,

I am reading vitual memory (VM) and I want to understand more about it from programming point of view. I have few queries pertaining to 1GB ram 32bit-x86 system:
[*] Is VM larger than RAM? if yes/no why?[*] How to calculate the minimum VM required for system?

Thanks in advance!

cornholiobg · 01-20-2014, 05:59 AM

The VM /Swap file is must to be 100/150% x RAM, but the best is 200% from RAM. For your way for 1GB RAM you need to create swap file 2GB.

Regards,
Alexander.

dolphin_oracle · 01-20-2014, 06:35 AM

I tend to match my swap file size to my memory size, although on my system swap is hardly ever used.

zhjim · 01-20-2014, 07:09 AM

I wont go into swap here. On my kvm host the process for each machine is slightly higher than the max mem configuration. Also some are a bit lower. It all heavily depends on what hypervisor you're using. As a generel rule of thumb I'd say they need a bit more of memory than configured