Re: why snmpd agent processing proc entries

Can someone comment on this please?

why netsnmp agent repeatedly process these entries even when no external
managers requesting them?


On Wed, Feb 27, 2013 at 1:44 PM, Pal Suri <[email protected]> wrote:

> While trying to understand the performance characteristics of snmpd agent,
> noticed agent was trying to open /proc/stat, /proc/vmstat pretty often and
> spend time processing it. This was observed even when no external
> management requests were sent causing us wondering what could be triggering
> these actions.
> Is there a setting in the agent that can turn off processing these actions?
>
> strace output of snmpd process:
>
> open("/proc/net/dev", O_RDONLY)         = 10
> socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 14
> fstat(10, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
> 0x7f7ffb603000
> read(10, "Inter-|   Receive               "..., 1024) = 569
> socket(PF_INET, SOCK_DGRAM, IPPROTO_IP) = 15
> ioctl(15, SIOCGIFINDEX, {ifr_name="lo", ifr_index=1}) = 0
> close(15)
>
> open("/proc/stat", O_RDONLY)            = 10
> read(10, "cpu  7549 54 8876 4137713 20417 "..., 4095) = 1368
> close(10)                               = 0
> open("/proc/vmstat", O_RDONLY)          = 10
> read(10, "nr_free_pages 109769\nnr_inactive"..., 4095) = 1796
> close(10)                               = 0
>
> Any insight or pointers appreciated.
> -pal
>

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