Subject: Re: changes to systat io/vm displays?
From: David Laight <firstname.lastname@example.org>
Date: 05/28/2003 16:34:14
On Sat, May 24, 2003 at 01:25:21PM -0400, Thor Lancelot Simon wrote:
> Between 1.6 and now, there seem to have been some major changes to the
> vm and io displays in systat. Some are good, some are bad. I have a
> few minor quibbles, however:
> 1) In the process of making these changes, the vm screen somehow got
> broken so that it does not reliably restore the terminal mode when
> the program is suspended or exited. This is extremely annoying
> since it makes it difficult to keep a systat vmstat going in the
> background ready for use while doing other work in a shell on
> the same tty.
Which part of the mode isn't restored? and on what terminal type?
It appears to be ok on an xterm.
> 2) The "scaling" change to the io screen is clever in that it makes
> the visual meaning of the bars more clear, but not so clever in that
> it removes the precise numerical value from the display completely.
But the number was only output when the bar hit 100.
If you want to see the numeric values type :nu when the iostat values
> In fact, if I/O throughput is hovering near a power of 10 and the
> update interval is set to the minimum 1 second, it can become
> impossible to read the base, read the exponent, and multiply them
> together quickly enough to actually understand what the throughput
> number was before the data are replaced on the screen. Not good.
I couldn't (quite) be bothered to add some histeresis to the exponent
Similarly some averaging would give a better view as to what was
happening than just the instantaneous values...
David Laight: email@example.com