Re: Oddly slow read performance with near-full largish FS

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Austin S Hemmelgarn <ahferroin7@xxxxxxxxx> wrote:
>
> This actually sounds kind of like the issues I have sometimes on my
> laptop using btrfs on an SSD, I've mostly resolved them by tuning IO
> scheduler parameters, as the default IO scheduler (the supposedly
> Completely Fair Queue, which was obviously named by a mathematician
> who had never actually run the algorithm) has some pretty brain-dead
> default settings.  The other thing I would suggest looking into
> regarding the variability is tuning the kernel's write-caching
> settings

Ok, that's something I will examine.  I knew CFQ is completely wrong for SSD
use, but I thought it was still one of the better schedulers for spinning
disks.  Apparently that may not be the case.

Thanks,

Charles
-- 
-----------------------------------------------------------------------
Charles Cazabon
GPL'ed software available at:               http://pyropus.ca/software/
-----------------------------------------------------------------------
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Filesystem Development]     [Linux NFS]     [Linux NILFS]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux