The following reply was made to PR bin/34011; it has been noted by GNATS.

From: Frank Kardel <kardel@netbsd.org>
To: gnats-bugs@netbsd.org
Cc: gnats-admin@netbsd.org, netbsd-bugs@netbsd.org
Subject: Re: bin/34011: systat vmstat ignores refresh-interval argument
Date: Sun, 16 Jul 2006 22:08:32 +0200

 I had a short look at that.
 26 seconds is the boundary where trouble starts (updates more
 than once a second) Does 256 ring a bell here? The function
 used is "timeout(millisecs)" from curses. The manual mentions
 no restriction on the number of millisecs supported. The limit
 is likely to be around 25600 millisecs as 26000 seems to fail.
 A short look into  lib/libcurses/timeout.c  shows that it  is the
 VTIME parameter(char!) of the termios interface - thus the systat
 implementation will currently be able to sensibly sleep 1-25 secs.
 For the curious: Above that the sleep time wraps to <secs-26>.4 s
 for 26-51 secs then +0.8, +0.2, +0.6, +0.0. But that is not useful
 unless you want the fast updates :-)
 
 Looks either like a doc bug or some more SMOP to get it o match 
 users expectations.