And again 32 vs 64 bits OS?

Question

linux

Hello, I want to raise an already possibly annoying question.
There is not a very new server with two dual core Xeons with 8-10 Gb ram will be used for a standard LAMP bundle. Actually a question: What to put 64 bit debian or 32 c bigmem? I raise this question only because it was noticed that with a 64-bit system, processes become much more gluttonous in terms of memory. Are these costs significant and worth paying attention to?

Answer 1

64 bits are a little faster because of the expansion of instructions (although someone like it)
And do not forget the limit of 2048MB per program for 32. There may be more memory in the system, then the same database will not be able to address it.
And no one bothers to run 32bit on x64

Answer 2

Outline the tasks first. What will be on the server? Base? web server? Virtualization?

Answer 3

Definitely 64 bits, nothing becomes much more voracious.

Answer 4

In LAMP + nginx, such costs against the background of the cost of a memory bar are ridiculous.
With the same load, it turns out 1000 vs 800 mb. Tested on debian lenny.

Answer 5

Unfortunately, I don’t know how in Linux, but in Windows, a 64-bit exe file becomes 2 times larger than a 32-bit one.
I understand pointers take up 2 times more space, well, integer constants too, well, some instructions have increased in size. But why is the whole file 2 times bigger??