Date: Fri, 13 Oct 2000 09:37:55 +0100 From: Antony T Curtis <antony@abacus.co.uk> To: freebsd-stable@FreeBSD.ORG Subject: Re: mbuf leakage on 4.1.1-STABLE Message-ID: <39E6C9E3.FAFF6C47@abacus.co.uk> References: <A567A7C3889FD2119D2600204840388C03E9EAE3@uemspricpf3.cpf.navy.mil>
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"Kuriyama, Kent K Mr (CPF N651KK)" wrote:
>
> Chris,
>
> Your email prompted me to look at mbuf utilization on a 4.1.1-STABLE box
> that is currently not in production.
>
> outside# netstat -m
> 130/160/7168 mbufs in use (current/peak/max):
> 129 mbufs allocated to data
> 1 mbufs allocated to packet headers
> 128/136/1792 mbuf clusters in use (current/peak/max)
> 312 Kbytes allocated to network (92% in use)
> ^^^^^^^^^^
> 0 requests for memory denied
> 0 requests for memory delayed
> 0 calls to protocol drain routines
> outside# uptime
> 4:32AM up 1 day, 14:01, 1 user, load averages: 0.00, 0.00, 0.00
>
> I don't know whether to be concerned about the 92% utilization since the
> number of bytes allocated seems low. The machine has never crashed but then
> it has never served as a server.
>
> Is this kind of mbuf utilization expected?
>
> Kent Kuriyama
> SPAWAR Sys Ctr San Diego D424, CINCPACFLT N671KK
> kuriyakk@cpf.navy.mil, 808-471-4125
Mine looks like the following:
A box with heavy traffic : FreeBSD 3.4-RELEASE
Average traffic exceeds 4GB per day.
# netstat -m
867/1120 mbufs in use:
800 mbufs allocated to data
67 mbufs allocated to packet headers
463/656/1024 mbuf clusters in use (current/peak/max)
1452 Kbytes allocated to network (71% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
# uptime
9:28AM up 206 days, 19:30, 1 user, load averages: 0.00, 0.00, 0.00
And a box with very light traffic : FreeBSD 4.1-20000828-STABLE
Average traffic less than 20MB per day.
$ netstat -m
207/448/4096 mbufs in use (current/peak/max):
157 mbufs allocated to data
50 mbufs allocated to packet headers
117/254/1024 mbuf clusters in use (current/peak/max)
620 Kbytes allocated to network (46% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
$ uptime
9:21AM up 17 days, 17:09, 4 users, load averages: 2.02, 0.97, 0.50
The worrying thing is that the box with light traffic has had to be
rebooted because it stopped talking on the network. This happens
expecially quickly if I am using NFS a lot.
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