# [OmniOS-discuss] performance extrremely low from nothing !

Bob Friesenhahn bfriesen at simple.dallas.tx.us
Wed May 25 02:04:15 UTC 2016

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    On Tue, 24 May 2016, Dirk-Jan Wemmers wrote:

    > Hi Fabio,
    >
    > is your pool (or one of your individual vdev’s) almost full? ZFS performance can take quite a nosedive when it fills up above say 80%.

    Also, deduplication can cause a precipitous nose-dive in performance
    if it is enabled, enough data is written, and there is not enough
    memory.

    Bob
    --
    Bob Friesenhahn
    bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
    GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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