Date: Sun, 24 Dec 2023 13:42:25 -0800 From: Mark Millard <marklmi@yahoo.com> To: void <void@f-m.fm>, freebsd-fs@freebsd.org Subject: Re: measuring swap partition speed Message-ID: <A539DD68-5FAD-4303-9FF1-350F17D90B26@yahoo.com> In-Reply-To: <0D286183-ACD6-4818-8E27-E03D7F16D288@yahoo.com> References: <0D286183-ACD6-4818-8E27-E03D7F16D288@yahoo.com>
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I just thought of another relevant setting that my normal context has but that the RPi4B snapshot does not have (by default) and you might not have: use of noatime (or analogous for ZFS) The default /etc/fstab for the snapshot: # more /ets/fstab # Custom /etc/fstab for FreeBSD embedded images /dev/ufs/rootfs / ufs rw 1 = 1 /dev/msdosfs/EFI /boot/efi msdosfs rw,noatime = 0 0 tmpfs /tmp tmpfs rw,mode=3D1777 0 = 0 /dev/label/growfs_swap none swap sw 0 = 0 Keeping access times updated causes lots of extra I/O activity. My future snapshot testing will likely mostly be with: # more /etc/fstab # Custom /etc/fstab for FreeBSD embedded images /dev/ufs/rootfs / ufs rw,noatime = 1 1 /dev/msdosfs/EFI /boot/efi msdosfs rw,noatime = 0 0 tmpfs /tmp tmpfs rw,mode=3D1777 0 = 0 /dev/label/growfs_swap none swap sw 0 = 0 =3D=3D=3D Mark Millard marklmi at yahoo.com
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