Date: Fri, 6 Mar 1998 19:39:36 -0800 (PST) From: Jan Koum <jkb@best.com> To: questions@FreeBSD.ORG Subject: Re: odd netstat statistic Message-ID: <Pine.BSF.3.96.980306193036.22224A-100000@shell6.ba.best.com> In-Reply-To: <Pine.BSF.3.96.980306142338.5640A-100000@shell6.ba.best.com>
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Ok, I answered one (regarding kvm_read: Bad address) of my own questions after looking through archives: =============== Date: Fri, 07 Jul 1995 00:45:07 -0700 From: David Greenman <davidg@Root.COM> To: "Kenneth D. Merry" <ken@rflab1.gtri.gatech.edu> Subject: Re: strange netstat errors > I've been getting occasional strange error messages from netstat, >usually something like this: (this is under 2.0.5) > >---- >Active Internet connections >Proto Recv-Q Send-Q Local Address Foreign Address (state) >tcp 0 0 wc206.auth wc115.1123 TIME_WAIT >netstat: kvm_read: kvm_read: Bad address This can happen whenever the internal state of the kernel changes while the information is being read. It can be made somewhat more robust and I might take a stab at it before 2.1R. -DG ============= I am still curious regarding the negative numbers in netstat's output and how can it be solved easy (I assume int or float overflow?) -- Yan On Fri, 6 Mar 1998, Jan Koum wrote: > > 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 [snip] > > 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] > And 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 > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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