Messages in this thread | | | Date | Sun, 23 Nov 2008 17:25:22 -0500 (EST) | From | Justin Piszcz <> | Subject | Re: Extreme slowness with xfs [WAS: Re: Slowness with new pc] |
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On Sun, 23 Nov 2008, Stian Jordet wrote:
> ti., 18.11.2008 kl. 11.51 -0200, skrev Sergio Luis: >> please post your config and dmesg output. It might help people try to >> identify something wrong. > > (see http://marc.info/?l=linux-kernel&m=122676220019858&w=2 for the > start of this thread) > > Hmm. I have now converted my root and /home filesystems to ext3, and > that actually fixed it (!). I have no idea why xfs is performing so > extremely poorly on this machine, i'm running xfs on every filesystem on > eight other computers (one heavy loaded server, as well). > > Anyway, I'm now unpacking the 2.6.27.6 kernel in 15 seconds, with xfs on > the same array it used between five and six minutes. > > I still have a xfs array, and when I copy files to or from that array, > the gnome session practically freezes, and the load average easily goes > beyond 10. > > How should I debug this? I'm not very eager about reformatting my 1,5TB > xfs array... Besides, xfs have never let me down earlier. > > Thanks. > > Please cc me on any replies. > > Regards, > Stian > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs >
As the original posted stated:
1. please post dmesg output 2. you may want to include your kernel .config 3. xfs_info /dev/mdX or /dev/device may also be useful 4. you can also check fragmentation: # xfs_db -c frag -f /dev/md2 actual 257492, ideal 242687, fragmentation factor 5.75% 5. something sounds very strange, I also run XFS on a lot of systems and have never heard of that before.. 6. also post your /etc/fstab options 7. what distribution are you running? 8. are -only- the two fujitsu's (raid0) affected or are other arrays affected on this HW as well (separate disks etc)? 9. you can also compile in support for latency_top & power_top to see if there is any excessive polling going on by any one specific device/function as well
Justin.
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