Date: Tue, 13 Dec 2011 13:52:32 -0800 From: Doug Barton <dougb@FreeBSD.org> To: freebsd-stable@FreeBSD.org Subject: kernel: negative sbsize for uid = 0 Message-ID: <4EE7C920.3010109@FreeBSD.org> In-Reply-To: <4EE29D3F.2030009@gridfury.com> References: <4EE29D3F.2030009@gridfury.com>
next in thread | previous in thread | raw e-mail | index | archive | help
I'm running 8.2-RELEASE-p4 i386 on some web servers that are generally lightly-moderately loaded, but occasionally see some heavy spikes where load average goes way up. When that is happening, but sometimes even when it's not, I get hundreds of this message spewing into the logs: kernel: negative sbsize for uid = 0 I haven't found anything particularly useful by searching for that message, the one reference was to mbufs, but that seems not to be the problem. Here is the output of 'netstat -m' during one of the load spikes: 598/1712/2310 mbufs in use (current/cache/total) 559/1533/2092/32768 mbuf clusters in use (current/cache/total/max) 559/1105 mbuf+clusters out of packet secondary zone in use (current/cache) 0/528/528/16384 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/8192 9k jumbo clusters in use (current/cache/total/max) 0/0/0/4096 16k jumbo clusters in use (current/cache/total/max) 1267K/5606K/6873K 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) 0/2239/6656 sfbufs in use (current/peak/max) 0 requests for sfbufs denied 0 requests for sfbufs delayed 809790 requests for I/O initiated by sendfile 0 calls to protocol drain routines So is this message something to worry about? If so, how can I diagnose what's happening, and how do I fix it? Doug
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4EE7C920.3010109>