[rhn-users] Question on memory usage
Redhat User
keep.rhn.users.ontopic at gmail.com
Tue Jan 23 00:46:38 UTC 2007
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On 1/22/07, Rigoberto Corujo <rcorujo at yahoo.com> wrote:
>
> Thank you for your reply, Frank.
>
> What I don't understand is that, on n11, there is
> 6289408 - 4896448 = 1392960 kB of swap being used, but
> there is 2521308 kB of free memory. Since there is
> still 2521308 kB of free memory, why would any swap be
> needed at all?
>
> The swappiness setting is the same on both machines
> and has not been modified.
>
> By the way, I forgot to mention that the version of
> Linux is 2.6.9-34.
>
> Rigoberto
>
> --- "Lamon, Frank III" <Frank_LaMon at csx.com> wrote:
>
> > Something doesn't jive here - n11 has done some
> > swapping and the OS "not running
> > anything other than the same minimal set of
> > processes" would not swap with 4GB of physical
> > memory. Something is requiring memory here and maybe
> > the swappiness setting has been modified, the OS
> > just sitting there won't swap.
> >
> > -----Original Message-----
> > From: rhn-users-bounces at redhat.com
> > [mailto:rhn-users-bounces at redhat.com]On Behalf Of
> > Rigoberto Corujo
> > Sent: Monday, January 22, 2007 5:05 PM
> > To: rhn-users at redhat.com
> > Subject: [rhn-users] Question on memory usage
> >
> >
> > Hello,
> >
> > I have two machines which have the same amount of
> > total memory. When the machines are booted, the
> > amount of free memory is the same as shown by
> > "/proc/meminfo". After a period of time, the amount
> > of free memory differs betweem the two machines even
> > though, at the time I'm taking a reading of
> > "/proc/meminfo", both machines are not running
> > anything other than the same minimal set of
> > processes.
> > That is, no user apps. Just the bare bones system
> > processes.
> >
> > Here's an example of two machines, n5 and n11, and
> > their "/proc/meminfo" values. Can someone explain
> > why
> > this situation would occur and is there any why to
> > tell Linux to reclaim any memory that's not actually
> > being used?
> >
> > [root at n5 ~]# cat /proc/meminfo
> > MemTotal: 4037388 kB
> > MemFree: 3814020 kB
> > Buffers: 24868 kB
> > Cached: 61404 kB
> > SwapCached: 60064 kB
> > Active: 34188 kB
> > Inactive: 119224 kB
> > HighTotal: 0 kB
> > HighFree: 0 kB
> > LowTotal: 4037388 kB
> > LowFree: 3814020 kB
> > SwapTotal: 6289408 kB
> > SwapFree: 6228780 kB
> > Dirty: 0 kB
> > Writeback: 0 kB
> > Mapped: 24776 kB
> > Slab: 37776 kB
> > Committed_AS: 50692 kB
> > PageTables: 1232 kB
> > VmallocTotal: 536870911 kB
> > VmallocUsed: 15788 kB
> > VmallocChunk: 536855115 kB
> > HugePages_Total: 0
> > HugePages_Free: 0
> > Hugepagesize: 2048 kB
> >
> >
> > [root at n11 ~]# cat /proc/meminfo
> > MemTotal: 4037388 kB
> > MemFree: 2521308 kB
> > Buffers: 17676 kB
> > Cached: 27108 kB
> > SwapCached: 1392056 kB
> > Active: 39660 kB
> > Inactive: 1403784 kB
> > HighTotal: 0 kB
> > HighFree: 0 kB
> > LowTotal: 4037388 kB
> > LowFree: 2521308 kB
> > SwapTotal: 6289408 kB
> > SwapFree: 4896448 kB
> > Dirty: 0 kB
> > Writeback: 0 kB
> > Mapped: 24324 kB
> > Slab: 40444 kB
> > Committed_AS: 50832 kB
> > PageTables: 1232 kB
> > VmallocTotal: 536870911 kB
> > VmallocUsed: 15788 kB
> > VmallocChunk: 536855115 kB
> > HugePages_Total: 0
> > HugePages_Free: 0
> > Hugepagesize: 2048 kB
> >
> > Thank you.
> >
> > Rigoberto
> >
> >
> >
> >
>
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