Re: how to monitor memory usage on freebsd systems

Thanks Michael for the reply.
But the total memory used was definitely not more than 10%.
I checked sysctl and it was less than 10%.
So the hrStorageUsed figure is incorrect.
Is there something wrong with the net-snmp implementation for Freebsd?

Regards

cm_gui



On Wed, Aug 13, 2008 at 12:54 AM, Hampton, Michael <
[email protected]> wrote:

>  Total Memory Used = (hrStorageUsed / hrStorageSize) * 100
>
> Physical memory = (117279 / 128596) * 100 = 91%
>
> Real memory = (103978/121008) * 100 = 85%
>
>
>
>  ------------------------------
> *From:* Chee Meng Gui [mailto:[email protected]]
> *Sent:* 12 August 2008 22:55
> *To:* Dave Shield
> *Cc:* Hampton, Michael; [email protected]
> *Subject:* Re: how to monitor memory usage on freebsd systems
>
>  Sorry , actually have to multiply the hrStorageUsed by the
> AllocationUnits, i.e.
> 1172379 x 4096.
> So actually almost all the Physical and Real memories are used!
> But this is definitely not the case.
>
> So how to get the total memory used on a Freebsd system from snmp?
>
> thank you.
>
>  hrStorageIndex                                hrStorageType
> hrStorageDescr hrStorageAllocationUnits hrStorageSize hrStorageUsed
> hrStorageAllocation
> Failures
> 1           HOST-RESOURCES-TYPES::hrStorageRam       Physical
> memory               4096 Bytes        128596        117279     0
>
> 2           HOST-RESOURCES-TYPES::hrStorageRam           Real
> memory               4096 Bytes        121008        103978       0
>
>
>
>
>
> On Tue, Aug 12, 2008 at 2:21 AM, Dave Shield <[email protected]>wrote:
>
>> 2008/8/12 Chee Meng Gui <[email protected]>:
>> > So the hrStorageEntry.hrStorageUsed.1  is in kilobytes?
>>
>> hrStorageUsed is reported in the units specified in hrStorageUnits.
>> So if hrStorageUnits.1 is 1024, then hrStorageUsed.1 is in Kb
>>
>>
>> > When I checked this result against the used memory output of sysctl {
>> > hw.physmem - ( ( vm.stats.vm.v_inactive_count +
>> vm.stats.vm.v_cache_count +
>> > vm.stats.vm.v_free_count ) * hw.pagesize ) } , the two were not equal.
>>
>> On FreeBSD with the latest (5.4.x) agent,  "Physical memory" is
>> retrieved by running sysctl on HW_USERMEM.   Most of the other
>> values are calculated by running sysctl on VM_METER
>>
>> See 'agent/mibgroup/hardware/memory/memory_freebsd.c'
>> for the details.
>>
>> Dave
>>
>
>
>
> --
> Chee Meng Gui
> Function Engineering
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>
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> 08/13/08 08:54:42
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-- 
Chee Meng Gui
Function Engineering
650-833-0660

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