Messages in this thread | | | Date | Mon, 22 Oct 2007 11:05:27 +0100 | From | Pádraig Brady <> | Subject | Re: Question about free/used memory on Linux |
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Ravinandan Arakali (rarakali) wrote: > Hi kernel gurus, > I am trying to find out the memory that's used on my linux box. > I find that there are quite a few confusing metrics. How do > I find out the "true" used memory ? > > 1. For eg. "free -m" shows free memory (excluding buffers/caches) > as 308 MB while I can see(from "df" output) that the the tmpfs > partitions take up about 400 MB. So, does "free -m" not consider > the tmpfs partitions ? > > 2. I try to add up RSS field of all processes reported by > "ps aux" command. But is it true that this would be misleading > in that, shared memory used by, say 2 processes would show > up twice here although there's only one copy in memory. Also > does this consider the fact that there's only one copy > of shared libraries ?
Have a look at this script so show RAM used by programs: http://www.pixelbeat.org/scripts/ps_mem.py
Note to display totals you will need this patch applied: http://lkml.org/lkml/2007/8/13/1224
Pádraig. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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