Date: Fri, 6 Mar 1998 18:21:49 -0800 (PST) From: Jan Koum <jkb@best.com> To: questions@FreeBSD.ORG Subject: odd netstat statistic Message-ID: <Pine.BSF.3.96.980306142338.5640A-100000@shell6.ba.best.com>
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Hello all,
I am getting odd netstat output. The machine is somewhat busy web
server (it only does httpd, about 100000 hits per day) running apache
1.2.5 and 2.2.5-RELEASE with custom kernel which has:
options NMBCLUSTERS=8192 #mbuf clusters at 8192
options CHILD_MAX=1024 #max number of child processes
options OPEN_MAX=1024
Here is what do I mean by weird netstat outputs:
% netstat -a
Active Internet connections (including servers)
Proto Recv-Q Send-Q Local Address Foreign Address (state)
tcp 0 0 www.http ww-tm03.proxy.ao.41143 TIME_WAIT
netstat: kvm_read: Bad address
???
udp 0 0 *.1304 *.*
udp 0 0 *.1303 *.*
udp 0 0 *.1302 *.*
[snip]
f45e8c00 dgram 0 0 0 f310a014 0 f310a794
f4552800 dgram 0 0 f4551480 0 f3179714 0 /var/run/log
The "???" was in the output, I didn't stick it in there. :)
Doing netstat -a again a second later worked just fine, but this
time I got: (notice the negative numbers)
tcp 0 0 www.http 207.235.168.3.10608 TIME_WAIT
tcp 0 0 www.http 207.235.168.3.10541 TIME_WAIT
tcp 320 -266393784 www.http 16.112.170.244.10526 -265120128
tcp 312 -266363128 www.http 144.94.170.244.10541 -266234176
tcp 239 -265502528 *.44020 144.134.170.244.37039 -265316220
tcp 2384 -266516456 *.44020 16.180.171.244.36893 CLOSED*
tcp 28 -264778220 *.43764 16.74.169.244.39013 CLOSED*
tcp 679 -266061684 *.44020 144.254.168.244.38924 -265958576
tcp 344 -266462408 *.43764 16.102.169.244.38938 CLOSED
tcp 56 -264760852 *.43508 16.75.171.244.6372 CLOSED*
tcp 0 -266389720 *.43764 144.156.170.244.39081 -266065488
[snip]
However, netstat -m seem to be fine:
% netstat -m
227 mbufs in use:
114 mbufs allocated to data
107 mbufs allocated to packet headers
5 mbufs allocated to protocol control blocks
1 mbufs allocated to socket names and addresses
111/408 mbuf clusters in use
844 Kbytes allocated to network (29% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
%
And almost every time netstat works right also:
% netstat -a | wc -l
104
%
But netstat -s is also doing negative numbers thingie *grin* :
% netstat -s
[snip]
tcp:
4821743 packets sent
3459033 data packets (-967744068 bytes)
263312 data packets (296817086 bytes) retransmitted
192 resends initiated by MTU discovery
847250 ack-only packets (102774 delayed)
0 URG only packets
2790 window probe packets
1185 window update packets
248173 control packets
4760259 packets received
2726009 acks (for -1008981097 bytes)
612410 duplicate acks
[snip]
%
Any suggestions? I assume this is of course not a good thing.
Even though it only happened today for the first time in a month. :)
I can upgrade to 2.2-STABLE or wait for 2.2.6, but is there any
other way to fix it? And would upgrade help?
-- Yan
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