[Bug 43484] Re: poor disk performance during heavy io

[Gareth Fitzworthington]

Confirming.
Bruce, thanks for the information.
The link you supplied earlier (attached again below) indicates that this issue is well known upstream (Linus T. no less). 
http://kerneltrap.org/node/14148

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Note to Kernel Team:
1/ I can find no upsteam bug or enhancement request with regards to this matter.
2/ This does seem to be an issue of some importance & inconvenience with heavy io loads.
3/ Probably best summarised as "ext3 + fsync + heavy io = very poor disk performance".
4/ A workaround appears to be:  adding mount options [noatime, nodiratime, data=writeback]
5/ Workaround for vim also indicated in above discussion.
6/ This is a fundamental design/functionality issue - maybe better handled as a Blueprint ( https://blueprints.launchpad.net/ubuntu ).

Passing to Kernel Team to consider.

** Changed in: linux-source-2.6.22 (Ubuntu)
     Assignee: (unassigned) => Ubuntu Kernel Team (kernel-team)
       Status: Incomplete => Confirmed

** Changed in: linux-source-2.6.15 (Ubuntu)
       Status: Incomplete => Confirmed

** Also affects: linux-source-2.6.24 (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu)
Sourcepackagename: linux-source-2.6.24 => linux
       Status: New => Incomplete

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Ubuntu Kernel Team (kernel-team)

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poor disk performance during heavy io
https://bugs.launchpad.net/bugs/43484
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