How much memory does it take to clone() a bash?
$ ps -o size,vsz,rss,args SZ VSZ RSS COMMAND
1428 6244 2212 -bash
About 1428MB, I guess. Not that it would be consumed, but that the kernel must guarantee to be available.
Regards, Luciano Rocha
Erm.. Perhaps I'm a bit behind on things, but I though the SZ field shows the number of pages that a process is using, not the number of Megs guaranteed. That'd make your estimate just a few orders of magnitude high.
The VSZ will give your answer in bytes rather than pages. That's the total process size in virtual memory, displayed in KB. The RSS is the amount of that's actually IN memory. The discrepency between these numbers would then indicate, at least in a crude way, the difference between what the app thinks it's using versus what the OS actually has tied up in the process.
So, you're looking at something more along the lines of 6MB, rather than 1.4GB; with 2M actually used.
Someone care to check my math?
