On 01/29/2017 03:06 PM, Mick wrote: > On Sunday 29 Jan 2017 22:10:59 Neil Bothwick wrote: >> On Sun, 29 Jan 2017 19:17:47 +0000, Mick wrote: >>>> Are you running fstrim once in a while like it's recommended? >>>> Apparently using 'discard' as an option when mounting is no longer >>>> recommended. On my laptops I use a systemd timer to do this. Before >>>> that I used anacron (I think it was anacron) which would run missed >>>> cronjobs. >>> >>> This is surprised me ... I just installed Gentoo on a MacBook and the >>> handbook/wiki said to use discard in fstab ... I'm running two PCs like >>> this now. :-/ >>> >>> Is there a URL somewhere recommending otherwise? >> >> man fstrim: >> >> Running fstrim frequently, or even using mount -o discard, might >> negatively affect the lifetime of poor-quality SSD devices. For most >> desktop and server systems a sufficient trimming frequency is once a >> week. Note that not all devices support a queued trim, so each trim >> command incurs a performance penalty on whatever else might be trying to >> use the disk at the time. > > Hmm .... I better take these discards off fstab then. Are these weekly trims > OK, if the PC is rebooted on a daily basis? >
Yes, just make sure you use anacron or a systemd timer that will run a missed job. I remember somewhere once or twice a day was OK as well as fstrim will complete faster. It is noticable when fstrim is running. Dan
