Am Sonntag, 7. Oktober 2012 schrieb Swâmi Petaramesh: > Hi, > > I have 4 machines, all converted to BTRFS about 6 months ago, now all > running Ubuntu Quantal with kernel 3.5.0-17 > > The matter is that all these machines are now getting slower and slower > everyday, every disk access causing the disk to be 100% busy for long > periods, to the point that I'm now seriously considering migrating > everything back to ext4... > > From the start BTRFS was "not very fast", still satisfactory, but now > it becomes truly unusable. > > On one machine, I know have a typical complete boot time to a usable > GUI that is over 4 minutes, with the HD still very busy for a couple > more minutes afterwards, where it used to be around 35-40 seconds in > ext4 ! > > Is there anything I could do to speed things back (without losing all > my snapshots or doubling the size of data on disk)...?
As told in my previous post its better to first understand the problem. What might help here, additionally to what I suggested already, is some output of vmstat 1 and iostat -dx 1 /dev/sda (or maybe even better 5 or 10 seconds interval) where /dev/sda is device or better partition where the workload happens. Also the amount of snapshots in use would be helpful I bet. Ciao, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
