Date: Wed, 13 May 2009 12:52:14 -0400 From: John Baldwin <jhb@freebsd.org> To: "Marc G. Fournier" <scrappy@hub.org> Cc: freebsd-stable@freebsd.org Subject: Re: More data on 7.2-RELEASE "hangs" Message-ID: <200905131252.15171.jhb@freebsd.org> In-Reply-To: <20090513133143.M17646@hub.org> References: <20090513040719.D17646@hub.org> <200905131009.00403.jhb@freebsd.org> <20090513133143.M17646@hub.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wednesday 13 May 2009 12:34:39 pm Marc G. Fournier wrote: > On Wed, 13 May 2009, John Baldwin wrote: > > > On Wednesday 13 May 2009 3:09:33 am Marc G. Fournier wrote: > >> > >> Don't know if this helps with anything, but it just hung after 2days again > >> ... nothing on the console ... top process running at the time shows the > >> following ... anything there look "concerning"? > > > > Is this a 2 CPU system? If so, both CPUs are actually running something, so > > it is not a deadlock per se. > > > >> 99402 www 1 96 0 163M 29892K CPU1 1 0:03 0.00% httpd > >> 13635 88 34 96 0 92340K 25604K CPU0 0 0:00 0.05% mysqld > > Here is what vmstat shows ~10 minutes before (or as) it hung solid last > time. I didn't think to save the one that ran just before this one (the > script runs every 5 minutes), but for the 'r b w' columns 'b' was around > 10ish, while 'w' was 0 ... within a 5 minute period of time, 'w' > literally skyrockets: > > procs memory page disks faults > cpu > r b w avm fre flt re pi po fr sr da0 pa0 in sy cs us sy id > 107 266 122 16155620 23084 3255 22 1 2 3358 1605 0 0 377 17835 5231 19 7 73 > 6 285 382 16446348 22532 111705 21155 1391 10049 51966 2187328 143 0 36344 499098 423971 3 2 95 > 0 73 386 16440468 23072 7052 1155 85 44 1292 73 372 0 1030 18631 8334 18 12 70 > 0 77 388 16440468 23088 126 1050 0 6 21 27 169 0 521 4186 4125 2 3 94 > 0 66 389 16440468 23104 4 713 0 13 44 58 227 0 352 2217 3504 0 5 95 Well, you had a whole lot of page faults and other VM activity, plus 500k syscalls. The 'w' is a count of swapped processes, so basically your box is swapping a whole lot it seems. I think your box is just overloaded. -- John Baldwin
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200905131252.15171.jhb>