Thank you Dave.
Now it is becoming clearer to me.
I read
/usr/ports/net-mgmt/net-snmp/work/net-snmp-5.4.1.2/agent/mibgroup/hardware/memory
but still don't know why the hrStorageUsed.1 is different from that
calculated from
sysctl.
I am using the 'free' script from
http://www.cyberciti.biz/faq/freebsd-command-to-get-ram-information/memory_freebsd.c
to find out the total used memory. { hw.physmem - ( (
vm.stats.vm.v_inactive_count + vm.stats.vm.v_cache_count +
> vm.stats.vm.v_free_count ) * hw.pagesize ) }
I can live with the slight discrepancy and use hrStorageUsed.1 as the total
used memory.
Thank you once again.
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
>
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