Date: Tue, 22 Nov 2011 23:03:00 +0100 From: J65nko <j65nko@gmail.com> To: Kees Jan Koster <kjkoster@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Diagnosing packet loss Message-ID: <CAHoY4sgjXgEsa-gFGRSUA3w4b8_q0-XVarjGE6FXGX=b5GFANg@mail.gmail.com> In-Reply-To: <B0BE38BD-CE86-4D42-9215-933150BA07D9@gmail.com> References: <B0BE38BD-CE86-4D42-9215-933150BA07D9@gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Nov 22, 2011 at 9:33 PM, Kees Jan Koster <kjkoster@gmail.com> wrote: > Dear All, > > I am stuck with a machine that shows serious packet loss (about 1% of all traffic is dropped). I tried the obvious (new network cable, different switch port, different ethernet interface on the machine), but the problems remain. > > Another machine that sits in the same rack and is hooked up to the same switch shows no such packet loss issues. The problematic machine is a dual Opteron with FreeBSD 8.2-STABLE from Thu Aug 11 14:05:47 CEST 2011. > > The machine is lightly loaded. A MySQL slave is running, but the machine is not serving queries. Plus a Munin server process. > > I am at a loss where to start diagnosing this. Can you advise me where to look? Are there network buffers that may be overflowing? > -- To check input/output errors and collisions : netstat -in Detailed TCP/IP statistics: netstat -s or netstat -ss Checking Receive and Send Queue : netstat -an -f inet Buffers: netstat -m Adriaan
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAHoY4sgjXgEsa-gFGRSUA3w4b8_q0-XVarjGE6FXGX=b5GFANg>