Dear Colleagues, I have a FreeBSD 11.2 system with 32G RAM which I'm going to use as a bhyve host with zvols and sparse zvols, with (almost) no services/daemons of its own.
Could you please clarify some points for me? 1. Does ARC actually cache zfs volumes (not files/datasets)? 2. If ARC does cache volumes, does this cache make sense on a hypervisor, because guest OSes will probably have their own disk cache anyway. 3. Would it make sense to limit vfs.zfs.arc_max to 1/8 or even less of total RAM, so that most RAM is available to guest machines? 4. What other zfs tuning measures can you suggest for a bhyve hypervisor? -- Victor Sudakov, VAS4-RIPE, VAS47-RIPN 2:5005/49@fidonet http://vas.tomsk.ru/
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