Date: Wed, 21 Oct 2009 10:20:27 -0500 From: Adam Vande More <amvandemore@gmail.com> To: Paul Halliday <paul.halliday@gmail.com> Cc: questions@freebsd.org Subject: Re: Looking for troubleshooting tips. Message-ID: <6201873e0910210820h1f7f9ce4y69df25fffb3681bc@mail.gmail.com> In-Reply-To: <2dab70a30910210758q616eb1e6sb42d5405f0ec9d1f@mail.gmail.com> References: <2dab70a30910210758q616eb1e6sb42d5405f0ec9d1f@mail.gmail.com>
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On Wed, Oct 21, 2009 at 9:58 AM, Paul Halliday <paul.halliday@gmail.com>wrote: > I use Freebsd as the base for my network monitoring sensors. These > machines run a netflow probe, act as a netflow collector and spool > full content data from a snort process FIFO that is bound to a span > port. During peak hours this can be 100MB saturated, its connected to > a GB intel NIC on the box (there is a separate uplink). > > In the background numerous little scripts run to produce summary data. > > The basic template for these systems has been the same for the past 4 > years and things have worked great. Recently, one of these machines > started to become a little laggy and I can't seem to identify the > issue. > > This system has always seen a lot of packet loss, I expect this though > as it is a busy site but this has never affected its performance. Can > an overloaded NIC cause serious performance issues like those I am > seeing? > > This is a recent top: > > last pid: 98870; load averages: 1.54, 1.41, 1.31 up 1+01:57:10 > 11:50:24 > 142 processes: 2 running, 139 sleeping, 1 zombie > CPU states: 30.9% user, 0.0% nice, 15.0% system, 1.7% interrupt, 52.4% > idle > Mem: 450M Active, 328M Inact, 168M Wired, 33M Cache, 110M Buf, 3700K Free > Swap: 2048M Total, 5112K Used, 2043M Free > > 7.0-RELEASE FreeBSD 7.0-RELEASE #0: Sun Feb 24 19:59:52 UTC 2008 > > To be honest, I don't know which counters are important. Is there > anything specific I should be concentrating on to determine the cause? > > Thanks. > > The top stats indicate a moderate load, nothing to worry about there. I think you'll need to focus on network specific troubleshooting and you'll need to provide more info than what you've given to start with that. -- Adam Vande More
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