On 8/28/06, Ow Mun Heng <[EMAIL PROTECTED]> wrote:
Has anyone here, who uses XFS fs, experiencing slow filesystem writes? I'm seeing throughput of like 4-3MB/s instead of like previously 15-20MB/s. I have read that there was some thing about "barriers" and I've tried re-mounting the FS w/ "nobarriers" but the performance didn't improve.
Hmm, nothing that I have seen. I'm running 2.6.18-rc2. My xfs settings look like: carcharias rjf # sysctl -a | grep xfs fs.xfs.stats_clear = 0 fs.xfs.inherit_nodefrag = 1 fs.xfs.rotorstep = 1 fs.xfs.inherit_nosymlinks = 0 fs.xfs.age_buffer_centisecs = 1500 fs.xfs.xfsbufd_centisecs = 100 fs.xfs.inherit_noatime = 1 fs.xfs.inherit_nodump = 1 fs.xfs.inherit_sync = 1 fs.xfs.xfssyncd_centisecs = 500 fs.xfs.error_level = 3 fs.xfs.panic_mask = 0 fs.xfs.irix_symlink_mode = 0 fs.xfs.irix_sgid_inherit = 0 fs.xfs.restrict_chown = 1 I would make sure you are not mounting with the sync option, or have anything with the sync flag set (chattr/lsattr). I have seen that result in performance like you describe... -Richard -- gentoo-user@gentoo.org mailing list
