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    SubjectChange in default vm_dirty_ratio

    The default vm_dirty_ratio changed from 40 to 10
    for the 2.6.22-rc kernels in this patch:

    IOZone write drops by about 60% when test file size is 50 percent of
    memory. Rand-write drops by 90%.

    Is there a good reason for turning down the default dirty ratio?
    How will it help for most cases? Intuitively, it seems like
    a less aggressive writeback will have better performance.


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      Last update: 2007-06-19 01:11    [W:0.024 / U:0.316 seconds]
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