hello all, Please help me: I want to limit ARC to 16GB, how to configure it? (I need it is alway limited to 16GB, even the machine is rebooted, the limit is still 16GB), how can I set ti. then you very much

I mean I use smartos, not OmniOS

Read up on the zfscache(8) command, which is a SmartOS exclusive.

Oh shoot. It *is* undocumented due to its experimental nature.

@tozhu ^^^

→ OS-8638: Want ability to specify zfs_arc_max (Resolved)

@tozhu the trick is to do it EARLY. If you're in Triton, see the ticket I pointed at for how you can do it today in Triton for CNs. (You'll have to use profiles, though, and unless your system is 128GiB the "compute-hvm" one will not help.

If you use absolute values, you will need to use the -l option.

`zfscache -l $((16 * 1024 * 1024 * 1024)) `

ANd you'll have to do it early in the system's boot for best results (it'll shrink but slowly, if you lower it mid-uptime).

There's a reason it's undocumented and not advertised: the mid-uptime shrinking scenario is not comprehensively tested.

danmcd: Thank you very much

other way is to add a loader.conf.local, isn't it?

ah, yes, this is what's there

danmcd: docs.smartos.org/modifying-boot-files looks a bit less scary to share