ZFS Memory useage

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dhenzler
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ZFS Memory useage

Post by dhenzler » Tue Jul 24, 2018 5:18 pm

I have a ZFS GhostBSD system which I really like. However when starting the software management tool, it would come up with a memory availability issue for a couple seconds then clear, and proceed to work normally.

Curious about this, and knowing that ZFS uses system Ram for caching I decided to add more memory... moving from 8GB to 16GB and running it at 1600MHz.

System seems snappier, however the ram useage is nearly 80% at times,and is generally hovering at 66% or more. I searched for some GhostBSD compatible command to limit RAM use. However have not found any. Wondering if I should try some Linux or Solaris11 commands?

HELP !

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ericbsd
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Re: ZFS Memory useage

Post by ericbsd » Tue Jul 24, 2018 8:22 pm

add vfs.zfs.arc_max="4G" in /boot/loader.conf that will limit arc to 4GB of ram.

dhenzler
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Re: ZFS Memory useage

Post by dhenzler » Tue Jul 24, 2018 9:25 pm

just curious what size RAM is required per 500 Gigabite of HD

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ericbsd
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Re: ZFS Memory useage

Post by ericbsd » Tue Jul 24, 2018 10:28 pm

It is 1GB of RAM per 1TB of HHD.

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