[rhn-users] Question on memory usage

[Guillermo Barton = Shark]

use the command 'top' to check what is going on, this will give you a 
better look at what is going on...might be a
maintenance job that is being launched via cron.  You'll be able to see 
it with top...

good luck

-G

Rigoberto Corujo 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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