Date: Fri, 26 Feb 2010 04:03:39 -0800 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Willem Jan Withagen <wjw@digiware.nl> Cc: stable@freebsd.org, Jack Vogel <jfvogel@gmail.com> Subject: Re: em0 freezes on ZFS server Message-ID: <20100226120339.GB17798@icarus.home.lan> In-Reply-To: <4B8795B1.4020006@digiware.nl> References: <4B86F384.3010308@digiware.nl> <2a41acea1002251459v40e8c6ddxd0437decbada4594@mail.gmail.com> <4B8795B1.4020006@digiware.nl>
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On Fri, Feb 26, 2010 at 10:34:41AM +0100, Willem Jan Withagen wrote: > This is wat netstat -m told me when it refused to revive em0: Below are the netstat -m counters/lines of concern: > 24980/2087/27067 mbufs in use (current/cache/total) > 24530/1070/25600/25600 mbuf clusters in use (current/cache/total/max) > 55305K/2801K/58106K bytes allocated to network (current/cache/total) Note how close the "current" value is to that of "total". I'm not too surprised you're seeing what you are as a result of this. What on earth is this machine doing at all times? Comparatively, here's some of our servers' netstat -m stats. All these boxes do nightly backups to a centralised box on a private gigE network. All boxes use em(4). RELENG_7 amd64 2010/01/09 -- primary HTTP, pri DNS, SSH server + ZFS 514/1931/2445 mbufs in use (current/cache/total) 512/540/1052/25600 mbuf clusters in use (current/cache/total/max) 1152K/6394K/7547K bytes allocated to network (current/cache/total) RELENG_7 amd64 2010/01/11 -- secondary DNS, MySQL, dev box + ZFS 514/1151/1665 mbufs in use (current/cache/total) 512/504/1016/25600 mbuf clusters in use (current/cache/total/max) 1152K/2203K/3356K bytes allocated to network (current/cache/total) RELENG_7 i386 2008/04/19 -- secondary HTTP, SSH server, heavy memory I/O 531/624/1155 mbufs in use (current/cache/total) 512/552/1064/25600 mbuf clusters in use (current/cache/total/max) 1156K/2408K/3564K bytes allocated to network (current/cache/total) RELENG_8 amd64 2010/02/02 -- central backups + NFS+ZFS-based filer 1572/3423/4995 mbufs in use (current/cache/total) 1563/3065/4628/25600 mbuf clusters in use (current/cache/total/max) 3519K/7401K/10920K bytes allocated to network (current/cache/total) -- | 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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