Messages in this thread |  | | | Date | Wed, 11 Mar 2009 13:16:38 +0100 | | Subject | Re: Memory usage per memory zone | | From | jack marrow <> |
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2009/3/11 Wu Fengguang <fengguang.wu@intel.com>: > On Wed, Mar 11, 2009 at 01:51:32PM +0200, jack marrow wrote: >> 2009/3/11 Wu Fengguang <fengguang.wu@intel.com>: >> > Hi jack, >> > >> > On Wed, Mar 11, 2009 at 11:41:43AM +0100, jack marrow wrote: >> >> Hello, >> >> >> >> I have a box where the oom-killer is killing processes due to running >> >> out of memory in zone_normal. I can see using slabtop that the inode >> > >> > How do you know that the memory pressure on zone normal stand out alone? >> >> For the normal zone only, I see "all_unreclaimable: yes" and 3 megs of free ram: >> >> kernel: Normal free:2576kB min:3728kB low:7456kB high:11184kB >> active:1304kB inactive:128kB present:901120kB pages_scanned:168951 >> all_unreclaimable? yes > > It's normal behavior. Linux kernel tries hard to utilize most of > the free memory for caching files :)
With all_unreclaimable = yes is normal?
> >> >> caches are using up lots of memory and guess this is the problem, so >> >> have cleared them using an echo to drop_caches. >> > >> > It would better be backed by concrete numbers... >> > >> >> >> >> I would quite like to not guess though - is it possible to use slabtop >> >> (or any other way) to view ram usage per zone so I can pick out the >> >> culprit? >> > >> > /proc/zoneinfo and /proc/vmstat do have some per-zone numbers. >> > Some of them deal with slabs. >> >> Thanks, I'll read up on how to interpret these. >> >> Do you recommend these two files for tracking down memory usage per >> process per zone? > > No, the two interfaces provide system wide counters. We have the well > known tools "ps" and "top" for per-process numbers, hehe.
ps and top do not have per-zone numbers. How do I get those?
> > Thanks, > Fengguang -- 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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