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