Date: Fri, 30 Mar 2007 12:28:58 +0545 From: Tek Bahadur Limbu <teklimbu@wlink.com.np> To: freebsd-performance@freebsd.org Subject: FreeBSD-6.1 reboots due to high mbufs Message-ID: <20070330122858.93392f43.teklimbu@wlink.com.np>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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@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 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (FreeBSD) iD8DBQFGDLGuVrOl+eVhOvYRAk8dAJ9dumhWCNTp6iHUy5PsQ0ie2OdMqQCgjG8u eTxXgRCNSe3R2mmTGSbuSqo= =mVGh -----END PGP SIGNATURE-----
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