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