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Date: Mon, 11 Dec 2006 23:37:14 +0100 (CET)
From: Wojciech Puchar <wojtek@chylonia.3miasto.net>
To: freebsd-questions@freebsd.org
Message-ID: <20061211233003.M25582@chylonia.3miasto.net>
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Subject: squid: no buffer space available - after tuning!
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average loaded site (about 1000 users), fast machine, lots of ram, fxp 
interfaces (no realteks), squid reports 32768 filedescriptors available

[root@w3cache ~]# limits -U squid
Resource limits for class squid:
   cputime          infinity secs
   filesize         infinity kB
   datasize         infinity kB
   stacksize        infinity kB
   coredumpsize            0 kB
   memoryuse        infinity kB
   memorylocked     infinity kB
   maxprocesses           64
   openfiles           32768
   sbsize           infinity bytes
   vmemoryuse       infinity kB
[

/etc/sysctl.conf:

kern.ipc.somaxconn=65535
kern.ipc.nmbclusters=32768
net.inet.tcp.delayed_ack=0
net.inet.icmp.icmplim=500
vm.defer_swapspace_pageouts=1
net.inet.tcp.sendspace=65536
net.inet.tcp.recvspace=65536
kern.ipc.shmseg=128
kern.ipc.shmall=16384
kern.maxfiles=65536
kern.maxfilesperproc=32768
kern.ipc.nmbclusters=131072
net.inet.ip.portrange.last=65535
vfs.lorunningspace=3145728
vfs.hirunningspace=6291456
net.inet.tcp.msl=5000

vfs.root.mountfrom="ufs:ad0a"
kern.cam.scsi_delay="1000"
kern.ipc.msgseg=1024
kern.ipc.msgssz=128
kern.ipc.msgtql=8192
kern.ipc.msgmnb=65536
kern.ipc.msgmni=100
kern.ipc.msgmax=8192
kern.maxproc=1000
kern.maxbcache=134217728
kern.dfldsiz=2147483648
kern.maxdsiz=2147483648



in dmesg i found lots of

ipfw: pullup failed


CPU load is always <10%, it's P4 machine with 2GB ram (much more 
than squid uses) running FreeBSD 6.2-RC1, 3 interfaces - out output, 2 for 
different connections, ipfw is used with only 1 line.



any more ideas?