Date: Sun, 7 Jun 1998 15:05:35 +0400 (MSD) From: bag@sinbin.demos.su (Alex G. Bulushev) To: mishania@demos.su (Mikhail A. Sokolov) Cc: wollman@khavrinen.lcs.mit.edu, dg@root.com, freebsd-current@FreeBSD.ORG Subject: Re: mbuf cluster problem continues!! Message-ID: <199806071105.PAA17878@sinbin.demos.su> In-Reply-To: <19980602192424.02082@demos.su> from "Mikhail A. Sokolov" at "Jun 2, 98 07:24:24 pm"
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> Hello,
>
> On Mon, Jun 01, 1998 at 12:26:41PM -0400, Garrett Wollman wrote:
> # <<On Sun, 31 May 1998 22:20:10 -0700, David Greenman <dg@root.com> said:
>
> # > I've seen several reports of mbuf leaks in the specific case of running
> # > squid proxy servers.
>
> # Not seen here.
>
> # root@xyz(4)$ netstat -m
> # 825/1408 mbufs in use:
>
> Oh well, it's not squid what is definite culprit here, not closing tcp
> connections: let's take a machine, which is attacked by clients, is being
> agressively used nfs server and doesn't even have any services besides nfs,
> which could leave tcp connections not closed:
>
> {zz}~/# netstat -m
> 10577/10688 mbufs in use:
> 10057 mbufs allocated to data
> 520 mbufs allocated to packet headers
> 451/728 mbuf clusters in use
> 2792 Kbytes allocated to network (79% in use)
> 0 requests for memory denied
> 0 requests for memory delayed
> 0 calls to protocol drain routines
> {zz}~/# uptime
> 6:44ÐÐ up 1 day, 8:57, 21 users, load averages: 1.85, 1.80, 1.62
>
> NMBCLUSTERS are 24k, and still the machine will leak mbuf's once a week.
>
it is intresting than in the case of nfs server (with mbuf's leak's)
it is no problems with number of mbuf claster's, only number of mbuf's
increased, for example:
4:29 up 6:42, 19 users, load averages: 1.06, 1.23, 1.48
^^^^ after reboot
> netstat -m
3609/3744 mbufs in use:
^^^^^^^^^
3084 mbufs allocated to data
525 mbufs allocated to packet headers
485/660 mbuf clusters in use
^^^^^^^
1788 Kbytes allocated to network (79% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
so 485 mbuf clusters and 3600 mbuf's allocated
and after several day's:
1:56 up 6 days, 4:09, 14 users, load averages: 0.58, 0.77, 0.84
^^^^^^^^^^^^^
> netstat -m
34613/34752 mbufs in use:
^^^^^^^^^^^
34393 mbufs allocated to data
220 mbufs allocated to packet headers
260/818 mbuf clusters in use
^^^^^^^
5980 Kbytes allocated to network (81% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
only 260 mbuf clusters allocated, but 34613 mbufs !!!
so this nfs server state is "before crash"
Alex.
>
> My 2 kopeks.
>
> --
> -mishania
>
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