Does ZFS use always such 'high' RAM

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pos-sudo

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Jun 13, 2021
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Dear,

I installed proxmox on a dedicated server with 128Gb RAM. After a couple days a saw that my RAM was filled over 60% (almost 70%) with only 3 VMS each 4GB. Therefore I was searching on the internet and read that ZFS uses 'free' RAM to cache. I was wondering if this is a static behaviour from ZFS? Will I be in trouble if I want more VM's or will ZFS reduce the amount of RAM when I need more for my (new) VMS.

Thanks in advanced.

Kind regards,
 
By default ZFS is using from 1GB up to 50% of your hosts RAM for caching. Under normal circumstances ZFSs ARC will shrink if the host needs the RAM for something else.
 
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Dunuin said:
By default ZFS is using from 1GB up to 50% of your hosts RAM for caching. Under normal circumstances ZFSs ARC will shrink if the host needs the RAM for something else.
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Hi, thank you for your reply, I'm glad to hear that :)
 
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