Re: [xfs-masters] how to use fstrim?

[Greg Freemyer <greg.freemyer@xxxxxxxxx>]

On Fri, Jul 26, 2013 at 9:50 PM, Dave Chinner <david@xxxxxxxxxxxxx> wrote:
> IOWs, the behaviour of fstrim on XFS is entirely dependent on the
> speed of the block layer and hardware implementations of discards.

And on a lot of SSDs, trim seems to act like a cache flush so it can
hit performance hard.  It should be scheduled for off-peak times
afaik.  It's not critical to run hourly or even daily.  If you can
schedule it once a week when other i/o is light that should be enough
for most workloads.

Greg
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Greg Freemyer