Date: Thu, 11 Mar 2010 17:10:03 -1000 From: Al Plant <noc@hdk5.net> To: David Jackson <djackson452@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Severe instabilities and system lockups Message-ID: <4B99B08B.8070105@hdk5.net> In-Reply-To: <4B997730.8070009@gmail.com> References: <4B952B38.70308@gmail.com> <4B997730.8070009@gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
David Jackson wrote: > David Jackson wrote: >> I am still having severe problems with severe system instabilities >> with FreeBSD and have had these problrms in 7.1 and 8.0. The system >> randomly locks up, it appears applications lock up when they access >> the USb disk. Also, when accessing the USB disk, the entire system >> lockup often for minutes. Performance with accessing USB disks is >> horrendous,. it took 7 hours to copy a directory that was 200 MB. Any >> program that accesses the USB disk tend to freeze for minutes, and >> often the entire system becomes unresponsive for minutes. Overall >> FreeBSD here is characterized by severe instabilities, ive had better >> performance from Windows 98 systems. The fact that the entire system >> freezes up, this should not happen, a well designed system will not >> lock up the entire OS when accessing disk. >> >> Are there any diagnostic tools uch as getting a log of tranmissions on >> USB and probe it, ,or finmd out what code it is lockilng up on ?Has >> anyone else seen these problems with USB disks? > Thank you for the reply to my concerns. I have been reading through them > carefully. > > I seem to have also discovered that the lockup problems are not entirely > due to USB issues. Many of them were being caused by an apparent problem > with the swap system. I have two swaps, a file backed swap and a > partition swap on the same disk. Apparently when having two swaps on the > disk there are severe performance problems. FreeBSD needs to fix > whatever is causing this thrashing problem. So far the lockups have seem > to become much less severe since i have disabled the file based swap > file. I may disable the partition swap but i do not know if it is > possible to have the system boot with a file based swap only. Perhaps i > can disable the partition swap after it boots. > > I am trying to copy a directory on the USB drive however and it does > seem to be rather slow still. It started at 5:45 and is still going. I > will see how long it takes. > > > Again thanks for the help with these issues > _______________________________________________ > > I dont think its a good idea to have two swaps on any HD. If you used the default setup under sysinstall for FreeBSD it gives how the setup should look. Is the USB a current 2.0? I cant ever recall having the problems you are describing on a FreeBSD box ever. Maybe you have funky hardware configuration. ~Al Plant - Honolulu, Hawaii - Phone: 808-284-2740 + http://hawaiidakine.com + http://freebsdinfo.org + + http://aloha50.net - Supporting - FreeBSD 7.2 - 8.0 - 9* + < email: noc@hdk5.net > "All that's really worth doing is what we do for others."- Lewis Carrol
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4B99B08B.8070105>