bin/54374: long-running 'systat vm' reports malloc errors

[Thomas Klausner <wiz%NetBSD.org@localhost>]

>Number:         54374
>Category:       bin
>Synopsis:       long-running 'systat vm' reports malloc errors
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jul 14 08:00:01 +0000 2019
>Originator:     Thomas Klausner
>Release:        NetBSD 8.99.50
>Organization:
Curiosity is the very basis of education and if you tell me that
curiosity killed the cat, I say only that the cat died nobly.
- Arnold Edinborough
>Environment:
	
	
Architecture: x86_64
Machine: amd64
>Description:
I've been monitoring an unstable machine by running 'systat vm' in a ssh connection
to it. Usually, after a couple of hours, the bottom line shows

can't get buffers: Cannot allocate memory

Pressing 'space' gets rid of it, but it usually reappears in the next hours.

The machine is far from running out of memory as far as I can tell.
(128 GB RAM, usually >90G free; no swap configured though).

No other process reports running out of memory (bulk build, top).
>How-To-Repeat:
Run 'systat vm' for some hours.
>Fix:
No idea.

>Unformatted: