Re: Fwd: NFS and Memory Buffers

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On Mon, Dec 15, 2014 at 7:52 AM, Benjamin Coddington
<bcodding@xxxxxxxxxx> wrote:
> Dear Pablo,
>
>         Why are you restarting snmpd between flushing cache and reading
> memory values?  On a running system you can probably expect the
> cache to immediately start to fill after a flush anyway.
> y
> Ben
>
> On Mon, 15 Dec 2014, Pablo Silva wrote:
>
>> Dear Readers:
>>
>>      My boss has entrusted me to analyze why the memory buffers are
>> not released a Linux server with Centos 6.4.?
>>
>>     As informs me, the current reading is:
>>
>>
>> [root@bck ~]# free -m
>>              total       used       free     shared    buffers     cached
>> Mem:         15936      15788        147          0       6746        438
>> -/+ buffers/cache:       8604       7332
>> Swap:         2047          0       2047
>> [root@bck ~]#
>> [root@bck ~]#
>> [root@bck ~]# echo 3 > /proc/sys/vm/drop_caches && service snmpd
>> restart && free -m
>> Stopping snmpd:                                            [  OK  ]
>> Starting snmpd:                                            [  OK  ]
>>              total       used       free     shared    buffers     cached
>> Mem:         15936        509      15426          0         93         16
>> -/+ buffers/cache:        400      15536
>> Swap:         2047          0       2047
>> [root@bck ~]#
>>
>>    I can not find the solution to release the memory buffer and cache
>> memory so grateful for any hint for finding the solution to this
>> "problem".
>>
>> -Paul
>>

See the top entry on googling "why does linux cache memory":
http://www.linuxatemyram.com/


-- 
Trond Myklebust

Linux NFS client maintainer, PrimaryData

trond.myklebust@xxxxxxxxxxxxxxx
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