BSD equivalent of Linux's free(1)?

Paul Schmehl pschmehl_lists at
Wed Aug 18 19:24:23 UTC 2010

--On Wednesday, August 18, 2010 14:14:25 -0400 Aleksandr Miroslav 
<alexmiroslav at> wrote:

> On Wed, Aug 18, 2010 at 1:41 PM, RW <rwmaillists at> wrote:
>> Is there any particular reason you want to know? Free memory isn't a
>> very meaningful concept in FreeBSD.
> I have a webserver that had it's Apache killed this morning. The box
> itself had been stable for several years, as well as the Apache
> instance. The error that I saw in /var/log/messages was something along
> the following:
>     "pid 1234 (httpd), uid 100, was killed: out of swap space"
> So I went to check what was eating up the swap,
> The problem itself was tracked down fairly easily, someone had added a
> shelt script to cron (/home/user/ and had mistakenly put the full
> path to the script into the script itself -- essentially creating a
> forkbomb.
> But while I was in the middle of debugging this and noticed that line
> from the logfile, I spent more time than necessary trying to figure out
> exactly how much swap/memory was being used, and who was using it.

man (8) pstat

pstat -s -m
Device          1M-blocks     Used    Avail Capacity
/dev/ad8s1b          8192        0     8191     0%

Paul Schmehl, Senior Infosec Analyst
As if it wasn't already obvious, my opinions
are my own and not those of my employer.
"It is as useless to argue with those who have
renounced the use of reason as to administer
medication to the dead." Thomas Jefferson

More information about the freebsd-questions mailing list