The mysterious kern.maxswzone
ml at netfence.it
Mon Jan 21 17:32:07 UTC 2019
On 1/21/19 5:03 PM, RW via freebsd-questions wrote:
> Do you know, for sure, that there isn't a risk of a panic if you run out
> of zone space before you run out of swap.
Short answer: NO!
I don't know for sure, but I think this isn't the case.
From what I read around, IIUC, zone space is used to manage swap space,
so the only effect is that some swap space won't be used.
I hope someone with more solid knowledge steps up...
> In amd64 you can't
> increase the zone size because that computed default is also the limit.
Then, why do I get the same warning ("warning: increase kern.maxswzone
or reduce amount of swap") if the suggested operation is not possible?
I guess the message should be patched.
> The value is in bytes, so it isn't huge. Try setting it to a few percent
> 36175872 * 131072 / 113792
> something like 42500000
"Huge" compared to what? :)
The OP has 512MiB of RAM: 42500000 byte is not a negligible amount in
that case, but he is the only one who knows if it's worth, based on his
More information about the freebsd-questions