Date: Mon, 20 Oct 2003 09:56:06 +0800 From: S H A N <shanali@magix.com.sg> To: freebsd-questions@freebsd.org Subject: udp packets drop Message-ID: <20031020015606.GA91943@blanc.magix.com.sg>
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hi,
i have a radius server running p3/1GB ram called yoyo. below is what has happened to it...
[root@yoyo:~]$ netstat -s -s -p udp
udp:
5397 datagrams received
186 dropped due to full socket buffers
5198 delivered
5207 datagrams output
[root@yoyo:~]$ netstat -i -b -d
Name Mtu Network Address Ipkts Ierrs Ibytes Opkts Oerrs Obytes Coll Drop
fxp0 1500 <Link#1> 00:c0:4f:01:15:9d 149570 0 10018080 13882 0 7040614 0 0
fxp0 1500 yyy.yyy.yyy.yyy yoyo 12807 - 1612355 13732 - 6840464 - -
fxp1 1500 <Link#2> 00:90:27:e5:bc:d4 596777 0 40928713 111791 0 10794960 0 0
fxp1 1500 192.168.192 192.168.192.13 111913 - 10269671 111726 - 9227484 - -
fxp2 1500 <Link#3> 00:90:27:e5:b5:5a 0 0 0 1 0 42 0 0
fxp2 1500 192.168.193 192.168.193.13 0 - 0 0 - 0 - -
lo0 16384 <Link#4> 133 0 74619 133 0 74619 0 0
lo0 16384 your-net localhost 133 - 74619 133 - 74619 - -
[root@yoyo:~]$ netstat -m
202/624/131072 mbufs in use (current/peak/max):
200 mbufs allocated to data
2 mbufs allocated to packet headers
198/406/32768 mbuf clusters in use (current/peak/max)
968 Kbytes allocated to network (0% of mb_map in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines
since yoyo needs to be tuned for udp performance, here is what i got in /etc/sysctl.conf
kern.ipc.maxsockbuf=2097152
net.inet.udp.recvspace=65535
net.inet.udp.maxdgram=57344
net.inet.udp.blackhole: 1
and compiled the kernel with these options
machine i386
cpu I686_CPU
ident yoyo
maxusers 1024
options NSFBUFS=1024
options NMBCLUSTERS=32768
ok. now the question is... yoyo complains that 186 udp packets dropped due to full socket buffers. so how to avoid loosing any packet?
please help this freebsd newbie.
S H A N
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