[Xymon] Unexpected times on "Connection Times" graph
cleaver at terabithia.org
Tue Aug 25 21:18:42 CEST 2015
I have to admit it's been quite a while since using xymonping directly.
Can you validate the "FPING=" line in xymonserver.cfg with any options
being given to it?
Normally, xymon runs an fping-like process with the '-Ae' options, which
request elapsed (round-trip) packet time. I don't believe we'd be summing
that. Even when extra pings are found for a given IP address (circa line
1400 of xymonnet.c) they're stored in a separate location and don't appear
to be summed.
On Tue, August 25, 2015 5:12 am, Galen Johnson wrote:
> Actually, you may notice that the ping time is the "total" time of the
> pings. The avg time is probably what Xymon should be keying on. I'm not
> where I can check but I think Xymon does a count of 8 or 10 pings so the
> value you see is likely the sum of all those...in your posting:
> --- palazzo.REDACTED.com <http://palazzo.redacted.com/> ping statistics
> 5 packets transmitted, 5 received, 0% packet loss, time *4003ms*
> rtt min/avg/max/mdev = 0.572/*0.645*/0.890/0.126 ms
> the highlighted value is more in line with what you are seeing when you
> it by hand.
> On Mon, Aug 24, 2015 at 6:02 PM, Shawn Heisey <hobbit at elyograg.org> wrote:
>> Here is a "connection times" graph from Xymon:
>> This shows "conn" times in the 40 millisecond rang, and "ssh" times in
>> the 200 microsecond range.
>> What is the source of the "conn" graph? I would have guessed ICMP, but
>> it doesn't make any sense for a ping to take longer than an ssh
>> connection, especially not that much longer. This is what I get if I
>> ping that machine from the xymon server ... it doesn't take anywhere
>> even CLOSE to 40 milliseconds:
>> [root at mcp xymon]# ping palazzo
>> PING palazzo.REDACTED.com (10.100.2.17) 56(84) bytes of data.
>> 64 bytes from palazzo.REDACTED.com (10.100.2.17): icmp_seq=1 ttl=62
>> time=0.572 ms
>> 64 bytes from palazzo.REDACTED.com (10.100.2.17): icmp_seq=2 ttl=62
>> time=0.582 ms
>> 64 bytes from palazzo.REDACTED.com (10.100.2.17): icmp_seq=3 ttl=62
>> time=0.573 ms
>> 64 bytes from palazzo.REDACTED.com (10.100.2.17): icmp_seq=4 ttl=62
>> time=0.611 ms
>> 64 bytes from palazzo.REDACTED.com (10.100.2.17): icmp_seq=5 ttl=62
>> time=0.890 ms
>> --- palazzo.REDACTED.com ping statistics ---
>> 5 packets transmitted, 5 received, 0% packet loss, time 4003ms
>> rtt min/avg/max/mdev = 0.572/0.645/0.890/0.126 ms
>> Can anyone shed light on this? My server config includes the following
>> My xymon server is version 4.3.14.
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