Date: Tue, 1 Dec 1998 07:38:28 -0700 From: "WALCZAK, Stan" <swalczak@shl.com> To: "'freebsd-questions@FreeBSD.ORG'" <freebsd-questions@FreeBSD.ORG> Subject: traffic problem Message-ID: <199812011447.HAA29995@docws002.shl.com>
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Our network environment:
Dell model Dimension XPS D333 pentium-II 333Mhz, 96 Meg RAM, 4.5 GIG IBM
ultra wide SCSI HD, ADAPTEC 2940UW controller, BIOS Phenix 4.0 release 6.0,
3-COM 905 TX network card, 8 MB Video Card AGP 2.2.7-RELEASE FreeBSD
2.2.7-RELEASE #0
this machines runs Apache Server 1.3, Qmail and Radius 2.3
Pipline 75 - original bios from 1996
Portmaster 2e - ComOS 3.7.2
the spike hits after I invoked www.alphainter.net page from machine outside
our network.
Output of the ping command looks like:
64 bytes from 142.77.1.1: icmp_seq=20 ttl=250 time=79.736 ms
64 bytes from 142.77.1.1: icmp_seq=21 ttl=250 time=49.781 ms
64 bytes from 142.77.1.1: icmp_seq=22 ttl=250 time=993.792 ms
64 bytes from 142.77.1.1: icmp_seq=23 ttl=250 time=795.402 ms
64 bytes from 142.77.1.1: icmp_seq=24 ttl=250 time=338.294 ms
64 bytes from 142.77.1.1: icmp_seq=25 ttl=250 time=94.049 ms
64 bytes from 142.77.1.1: icmp_seq=26 ttl=250 time=275.623 ms
64 bytes from 142.77.1.1: icmp_seq=27 ttl=250 time=359.182 ms
64 bytes from 142.77.1.1: icmp_seq=29 ttl=250 time=412.320 ms
64 bytes from 142.77.1.1: icmp_seq=30 ttl=250 time=223.237 ms
64 bytes from 142.77.1.1: icmp_seq=31 ttl=250 time=127.166 ms
64 bytes from 142.77.1.1: icmp_seq=32 ttl=250 time=687.519 ms
64 bytes from 142.77.1.1: icmp_seq=34 ttl=250 time=578.269 ms
64 bytes from 142.77.1.1: icmp_seq=35 ttl=250 time=149.857 ms
64 bytes from 142.77.1.1: icmp_seq=36 ttl=250 time=372.875 ms
64 bytes from 142.77.1.1: icmp_seq=37 ttl=250 time=133.176 ms
64 bytes from 142.77.1.1: icmp_seq=31 ttl=250 time=127.166 ms
64 bytes from 142.77.1.1: icmp_seq=32 ttl=250 time=687.519 ms
64 bytes from 142.77.1.1: icmp_seq=34 ttl=250 time=578.269 ms
64 bytes from 142.77.1.1: icmp_seq=35 ttl=250 time=149.857 ms
64 bytes from 142.77.1.1: icmp_seq=36 ttl=250 time=372.875 ms
64 bytes from 142.77.1.1: icmp_seq=37 ttl=250 time=133.176 ms
64 bytes from 142.77.1.1: icmp_seq=38 ttl=250 time=216.877 ms
64 bytes from 142.77.1.1: icmp_seq=39 ttl=250 time=504.699 ms
64 bytes from 142.77.1.1: icmp_seq=40 ttl=250 time=709.457 ms
64 bytes from 142.77.1.1: icmp_seq=41 ttl=250 time=532.827 ms
64 bytes from 142.77.1.1: icmp_seq=42 ttl=250 time=261.998 ms
64 bytes from 142.77.1.1: icmp_seq=43 ttl=250 time=186.549 ms
--- ns.uunet.ca ping statistics ---
44 packets transmitted, 42 packets received, 4% packet loss
round-trip min/avg/max/stddev = 46.531/249.858/993.792/242.634 ms
For me it's looks suspicious. Any suggestions why there are jumps up to
993.792 ms ?
The other issue (maybe related) is memory avaialbe, here is output from
vmstat -m command:
# vmstat -m
Memory statistics by bucket size
Size In Use Free Requests HighWater Couldfree
16 40 728 838 1280 0
32 92 36 4616 640 0
64 1612 52 38517 320 0
128 1814 170 71659 160 47
256 958 50 104696 80 0
512 47 17 3791 40 0
1K 28 48 195389 20 24323
2K 13 11 111 10 19
4K 7 3 234 5 0
8K 0 1 2 5 0
16K 3 0 3 5 0
Memory usage type by bucket size
Size Type(s)
16 devbuf, pcb, routetbl, vnodes, proc, temp
32 devbuf, pcb, routetbl, pgrp, session, proc, subproc, temp
64 devbuf, routetbl, ifaddr, namecache, VM mapent, VM pgdata, file,
lockf, in_multi, temp
128 pcb, routetbl, zombie, ifaddr, cred, vnodes, VM map, VM object,
VM pgdata, file desc, proc, temp, ttys
256 devbuf, socket, pcb, routetbl, ioctlops, vnodes, VM map, VM pgdata,
file desc, subproc, FFS node, NFS srvsock, NFS daemon, temp,
isa_devlist, select
512 devbuf, pcb, ioctlops, mount, UFS mount, proc, temp, isa_devlist,
BIO buffer
1K mbuf, devbuf, namei, UFS mount, NQNFS Lease, MSDOSFS mount, temp,
BIO buffer
2K devbuf, ioctlops, NFS node, UFS quota, UFS mount, ttys, BIO buffer
4K devbuf, ioctlops, namecache, temp
8K VM pgdata, temp
16K devbuf
Memory statistics by type Type Kern
Type InUse MemUse HighUse Limit Requests Limit Limit Size(s)
mbuf 1 1K 1K 7942K 1 0 0 1K
devbuf 45 85K 85K 7942K 91 0 0
16,32,64,256,512,1K,2K,4K,16K
socket 18 5K 6K 7942K 134 0 0 256
pcb 29 6K 7K 7942K 136 0 0
16,32,128,256,512
routetbl 25 3K 4K 7942K 53 0 0
16,32,64,128,256
zombie 0 0K 1K 7942K 3653 0 0 128
ifaddr 9 2K 2K 7942K 9 0 0 64,128
namei 0 0K 4K 7942K 188245 0 0 1K
ioctlops 0 0K 4K 7942K 9 0 0 256,512,2K,4K
cred 13 2K 3K 7942K 695 0 0 128
pgrp 16 1K 1K 7942K 494 0 0 32
session 14 1K 1K 7942K 354 0 0 32
mount 5 3K 3K 7942K 5 0 0 512
NFS node 1 2K 2K 7942K 1 0 0 2K
vnodes 878 109K 118K 7942K 1669 0 0 16,128,256
namecache 842 57K 57K 7942K 842 0 0 64,4K
UFS quota 1 2K 2K 7942K 1 0 0 2K
UFS mount 13 17K 17K 7942K 13 0 0 512,1K,2K
VM map 33 8K 12K 7942K 3686 0 0 128,256
VM mapent 614 39K 39K 7942K 614 0 0 64
VM object 613 77K 98K 7942K 61699 0 0 128
VM pgdata 139 16K 16K 7942K 149 0 0 64,128,256,8K
file 56 4K 5K 7942K 36901 0 0 64
file desc 31 5K 7K 7942K 3684 0 0 128,256
lockf 6 1K 1K 7942K 54 0 0 64
proc 34 14K 21K 7942K 3693 0 0 16,32,128,512
subproc 33 3K 4K 7942K 7339 0 0 32,256
FFS node 820 205K 210K 7942K 94530 0 0 256
NQNFS Lease 1 1K 1K 7942K 1 0 0 1K
NFS srvsock 2 1K 1K 7942K 2 0 0 256
NFS daemon 1 1K 1K 7942K 1 0 0 256
in_multi 2 1K 1K 7942K 2 0 0 64
MSDOSFS mount 1 1K 1K 7942K 1 0 0 1K
temp 40 5K 19K 7942K 2871 0 0
16,32,64,128,256,512,1K,4K,8K
ttys 246 33K 38K 7942K 909 0 0 128,2K
isa_devlist 1 1K 1K 7942K 2 0 0 256,512
BIO buffer 22 23K 68K 7942K 7278 0 0 512,1K,2K
select 9 3K 3K 7942K 35 0 0 256
Memory Totals: In Use Free Requests
724K 148K 419856
----------------------------------------------------------------------------
----------------------------------------------------
swapinfo looks OK
# swapinfo
Device 1K-blocks Used Avail Capacity Type
/dev/sd0s1b 262144 5004 257076 2% Interleaved
----------------------------------------------------------------------------
----------------------------------------------------
And vmstat too (I think)
# vmstat -i
interrupt total rate
clk0 irq0 15723779 100
rtc0 irq8 20125339 127
pci irq11 87271 0
pci irq9 45621 0
fdc0 irq6 1 0
psm0 irq12 836 0
Total 35982847 228
Any ideas ?
Thanks in advance !
s.w.
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