FreeBSD-6.1 reboots due to high mbufs

[Sunil Sunder Raj]

Hi,

Seems to be an old posting. Were you able to solve this problem. What is 
your ifconfig output.

Sunil Sunder Raj
http://daemon.in


>From: Tek Bahadur Limbu <teklimbu at wlink.com.np>
>To: freebsd-performance at freebsd.org
>Subject: FreeBSD-6.1 reboots due to high mbufs
>Date: Fri, 30 Mar 2007 12:28:58 +0545
>
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>Dear All,
>
>I am quite new to FreeBSD in general and I also don't have much experience 
>and knowledge as required by this mailing list. I had posted this on 
>freebsd-questions but till now have not received any kind of feedback which 
>is fine.
>
>I need some help and suggestions from this mailing list if permissible. I 
>am sorry if I am posting this to the wrong mailing list.
>
>I have squid proxy server running on a FreeBSD-6.1 (amd) box. I have been 
>facing this problem for sometime now. It's related to mbufs. For some 
>reasons, my mbufs usage is extremely high. This high mbufs usage causes 
>slow responses from Squid and in rare occasions, it even causes my server 
>to reboot or locks out SSH sessions.
>
>This FreeBSD-6.1 squid box serves about 3000-4000 users.
>
>Server specs are:
>
>Dell 430 Intel(R) Pentium(R) D CPU 3.00GHz-Dual CPU
>real memory  = 2145959936 (2046 MB)
>bge0: <Broadcom BCM5751 Gigabit Ethernet
>traffic load: 10Mb/s (through satellite)
>
>root at server# netstat -m
>
>66713/2677/69390 mbufs in use (current/cache/total)
>66686/2210/68896/0 mbuf clusters in use (current/cache/total/max)
>66686/2178 mbuf+clusters out of packet secondary zone in use 
>(current/cache)
>0/0/0/0 4k (page size) jumbo clusters in use (current/cache/total/max)
>0/0/0/0 9k jumbo clusters in use (current/cache/total/max)
>0/0/0/0 16k jumbo clusters in use (current/cache/total/max)
>150050K/5089K/155139K bytes allocated to network (current/cache/total)
>0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
>0/0/0 requests for jumbo clusters denied (4k/9k/16k)
>0/0/0 sfbufs in use (current/peak/max)
>0 requests for sfbufs denied
>0 requests for sfbufs delayed
>0 requests for I/O initiated by sendfile
>0 calls to protocol drain routines
>
>
>/etc/sysctl.conf:
>
>kern.maxfilesperproc=8192
>kern.ipc.somaxconn=8192
>kern.maxprocperuid=8192
>net.inet.ip.portrange.hifirst=10000
>net.inet.ip.portrange.first=30000
>net.inet.ip.portrange.last=65535
>net.inet.tcp.recvspace=65535
>net.inet.tcp.sendspace=65535
>net.inet.tcp.blackhole=2
>net.inet.udp.blackhole=1
>net.inet.ip.fw.verbose_limit=5000
>net.inet.icmp.icmplim=0
>net.inet.tcp.msl=3000
>net.isr.direct=1
>vfs.read_max=16
>
>/boot/loader.conf:
>
>kern.ipc.nmbclusters=0
>kern.maxusers=0
>kern.maxfiles=16384
>kern.maxproc=8192
>
>Relevant Kernel Options:
>
>options         IPFIREWALL
>options         IPFIREWALL_VERBOSE
>options         IPFIREWALL_FORWARD
>options         IPFIREWALL_VERBOSE_LIMIT=5000
>options         IPFIREWALL_FORWARD_EXTENDED
>
>options         MSGMNB=16384
>options         MSGMNI=41
>options         MSGSEG=2049
>options         MSGSSZ=64
>options         MSGTQL=2048
>options         SHMSEG=128
>options         SHMMNI=192
>options         SHMMAX=33554432
>options         SHMMIN=1
>options         SHMALL=8192
>
>options HZ=1000  #Polling Enabled
>
>
>Note: Running IPFW. Also my other FreeBSD-4.x servers don't seem to suffer 
>from this problem. They have almost the same IPFW, Squid and Sysctl 
>configs.
>
>Any feedback and suggestions will be highly appreciated.
>
>Thanking you...
>
>
>- --
>
>
>With best regards and good wishes,
>
>Yours sincerely,
>
>Tek Bahadur Limbu
>
>(TAG/TDG Group)
>Jwl Systems Department
>
>Worldlink Communications Pvt. Ltd.
>
>Jawalakhel, Nepal
>
>http://www.wlink.com.np
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