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Date:      Fri, 15 Jun 2018 13:43:02 +0930
From:      Shane Ambler <FreeBSD@ShaneWare.Biz>
To:        Albert Shih <Albert.Shih@obspm.fr>
Cc:        freebsd-fs@freebsd.org
Subject:   Re: What append when arc full
Message-ID:  <8311a9a9-1a14-3520-aea3-8078e99713b9@ShaneWare.Biz>
In-Reply-To: <20180614054333.GA7053@io.chezmoi.fr>
References:  <20180613200700.GA3156@io.chezmoi.fr> <248ad0be-2002-89b5-0c1a-3ac73d493149@ShaneWare.Biz> <20180614054333.GA7053@io.chezmoi.fr>

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On 14/06/2018 15:13, Albert Shih wrote:
> Le 14/06/2018 à 13:06:07+0930, Shane Ambler a écrit

>> If you want to keep some ram free for your processes, then you can set
>> vfs.zfs.arc_max to limit the ram used by ARC. On recent system versions
>> you can change it dynamically using sysctl or you can set it in
> 
> "dynamically" .... I though it's only can set at boot time, at least it's
> what
> 
>     https://www.freebsd.org/doc/handbook/zfs-advanced.html

It seems the handbook has dropped behind. The ability to change arc_max
and arc_min at runtime was merged into stable/10 and stable/11 almost
two years ago, that means 10.4 and 11.x can do it but 10.3 or older will
have to be set in /boot/loader.conf


-- 
FreeBSD - the place to B...Storing Data

Shane Ambler




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