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Re: Runaway network bandwith alarms after upgrade

From: Paul Theodoropoulos
Subject: Re: Runaway network bandwith alarms after upgrade
Date: Tue, 18 Oct 2016 11:16:33 -0700
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Hi Martin,
Apologies for leaving that out - yes, all the other servers were Debian Wheezy, and all have been upgraded to Debian Jessie. All are running MOnit 5.19.

The server in question does get a lot of traffic, and notably has significant traffic - After two days uptime, there's 30 GiB of data through lo. However, even that doesn't add up to greater than 3GB/hour.

On 10/18/16 07:55, Martin Pala wrote:
Hello Paul,

as you mentioned you have upgraded other servers in the farm and didn't 
experienced this problem ... what was the version on these other servers? (both 
Debian and monit?)

Best regards,

On 17 Oct 2016, at 22:55, Paul Theodoropoulos <address@hidden> wrote:

I recently upgraded a couple of servers from Debian Wheezy to Debian Jessie. 
Since then, I'm getting frequent alarms from my network bandwidth test.

The test:
check network network-bandwidth with interface eth0
if total upload > 3 GB in last 1 hours then alert
if total download > 5 GB in last 2 hours then alert
if total download > 10 GB in last day then alert

I wasn't getting alarms before the upgrade, so to try to be thorough, I rebuilt 
monit from source. No change. This is 5.19.

The problem is that there's definitely not bandwidth anywhere near my testing 
values taking place. With an uptime of 1 day, 14 hours, eth0 shows:

eth0      Link encap:Ethernet  HWaddr 00:50:56:a7:3e:8e
         inet addr:  Bcast:  Mask:
         inet6 addr: fe80::250:56ff:fea7:3e8e/64 Scope:Link
         RX packets:27941718 errors:0 dropped:21 overruns:0 frame:0
         TX packets:59281394 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:333591539 (318.1 MiB)  TX bytes:4005580141 (3.7 GiB)

Thoughts? I upgraded a number of other servers in our farm, and have not 
experienced this.

Paul Theodoropoulos

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