Date: Tue, 8 Jun 2010 02:45:04 -0700 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Anders Nordby <anders@FreeBSD.org> Cc: freebsd-fs@freebsd.org Subject: Re: Odd network issues on ZFS based NFS server Message-ID: <20100608094504.GA86086@icarus.home.lan> In-Reply-To: <20100608083649.GA77452@fupp.net> References: <20100608083649.GA77452@fupp.net>
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On Tue, Jun 08, 2010 at 10:36:49AM +0200, Anders Nordby wrote: > I have a file server running 8.1-PRERELEASE amd64, where I share some > filesystems using NFS and Samba. After running for a day or two, the > server starts to get around 25% packet loss, browsing directories across > NFS gets really slow etc. Rebooting solves it until it happens again. > Has anyone experienced anything similar? I had this issue in FreeBSD 7 > as well, upgrading did not help. > > PS: I used mountd and /etc/exports to share the filesystems. I also > regularly run zpool status from monitoring systems. I also replaced the > server physically, changed switch ports, cables etc. So it does not seem > to be a problem with hardware. For what it's worth, we have a similar setup, but without Samba. Machine happens to be running 8.0-STABLE (world/kernel Mon Apr 26 02:26:36). No packet loss seen, and no overall issues aside from some input errors on our em1 NIC (which do not correlate on the switch its connected to). NFS is not used heavily aside from daily backup jobs across a gigE nework. Machine has been up 42 days. $ netstat -ibn Name Mtu Network Address Ipkts Ierrs Idrop Ibytes Opkts Oerrs Obytes Coll em0 1500 <Link#1> XX:XX:XX:XX:XX:XX 1541235 0 0 344966704 359378 0 255337127 0 em0 1500 XX.XX.XX.XX/X XX.XX.XX.XX 424637 - - 271854885 359033 - 250287803 - em1 1500 <Link#2> XX:XX:XX:XX:XX:XX 62851814 59 0 81941673228 43418668 0 3520821042 0 em1 1500 XX.XX.XX.XX/X XX.XX.XX.XX 62813816 - - 81059999660 43464778 - 2912408432 - lo0 16384 <Link#3> 3288 0 0 435566 3288 0 435566 0 lo0 16384 127.0.0.0/8 127.0.0.1 3288 - - 435566 3288 - 435566 - $ netstat -m 3085/2165/5250 mbufs in use (current/cache/total) 2549/2433/4982/25600 mbuf clusters in use (current/cache/total/max) 2048/896 mbuf+clusters out of packet secondary zone in use (current/cache) 0/104/104/12800 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/6400 9k jumbo clusters in use (current/cache/total/max) 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max) 5869K/5823K/11692K 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 switch# show interfaces 2 Status and Counters - Port Counters for port 2 Name : XXXXXXXXXX Link Status : Up Totals (Since boot or last clear) : Bytes Rx : 2,512,873,738 Bytes Tx : 1,117,402,842 Unicast Rx : 169,702,228 Unicast Tx : 237,760,196 Bcast/Mcast Rx : 12,667 Bcast/Mcast Tx : 75,726 Errors (Since boot or last clear) : FCS Rx : 0 Drops Rx : 0 Alignment Rx : 0 Collisions Tx : 0 Runts Rx : 0 Late Colln Tx : 0 Giants Rx : 0 Excessive Colln : 0 Total Rx Errors : 0 Deferred Tx : 0 Rates (5 minute weighted average) : Total Rx (bps) : 1449296 Total Tx (bps) : 1504528 Unicast Rx (Pkts/sec) : 0 Unicast Tx (Pkts/sec) : 0 B/Mcast Rx (Pkts/sec) : 0 B/Mcast Tx (Pkts/sec) : 0 Utilization Rx : 00.04 % Utilization Tx : 00.04 % -- | Jeremy Chadwick jdc@parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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