Re: dmesg content lifetime

It disappears a piece at a time - the oldest entries disappear first. 
However, it vanishes even when there are only 2-3 lines in it so I didn't 
think capacity was in play as I expected.

So for example I might see a rate-limit entry from someone spamming the 
system and then it will usually be gone in a couple days and the buffer is 
completely empty.   Similarly if I do something like ifconfig em0 down; 
ifconfig em0 up ; it's logged but disappears after a day or so.

I'm looking to see if this is just a cron job or something clearing it as 
it might be user-error on my part.   Also this is an older system so I'll 
probably look at it again after I update.

Thank you,

Dan


On Tue, 22 Nov 2022, Warner Losh wrote:

> On Tue, Nov 22, 2022 at 8:13 AM Dan Mack <mack@macktronics.com> wrote:
>
>> It seems like dmesg content ages out over time.   Is there a way to leave
>> the contents based on a fixed memory size instead?
>>
>
> It already is a fixed memory size. Do you see it all disappear at once, or
> over time?
>
> Warner
>