Re: How much RAM does ctwm consume?

[email protected] wrote:

> Does anyone have any idea how much RAM standard ctwm, sans panel,
> consumes? I'm involved in a discussion of lightweight WMDEs on a
> different mailing list.

I wrote,
on a PC running Fedora 29, with KiB Mem : 8066008 KiB Swap: 16383996

>      axs       1617  0.0  0.0 221224  3692 ?        S    Dec08   1:01 ctwm -W
>
> I think that means 221224 Kb virtual and 3692 Kb resident.

I.e. about 221Mb virtual and 3.7MB resident.

[email protected] wrote:

> Hmm... I wonder why your VM use is so high, mine is 37MB here on a 64bit
> hosts that's been running for a month, with a few hundred windows
> (tho it's nothing to worry about: the VM use is generally due to
> dynamically-linked libraries and doesn't necessarily reflect any use of
> *real* memory).  FWIW, my RSS is 4MB, which is about the same as yours.

[email protected] wrote:

> I get:
>
>  2013  0.0  0.0  16044  6104 ?        Ss   16:23   0:01 /usr/bin/ctwm
>
> I got the same using htop.
>
> Not many hours uptime, four desktops and iconmanager and pager running.

I have no explanation for my high VM use unless it indicates that there has
been no need for a VM garbage collection since I last re-booted. I'll have
to check the value after I next reboot the PC.

I also tried restarting ctwm on the PC, using
    ctwm --replace &

Before and after values hardly changed except for 2MB extra main memory:

Before replace
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
axs       1617  0.0  0.0 221224  3644 ?        S    Dec08   1:02 ctwm -W

after replace
axs      32155  1.0  0.0 221052  5640 pts/7    S    22:39   0:00 ctwm

So the amount of physical memory has gone up after replace.

I have 8GBram and about 16GB swap (probably a lot more than necessary?)

On a laptop:
I've also tried on a recently rebooted Stonebook mini laptop running
Fedora 31 with 8GB SDram and 16GB swap space.

After exiting ctwm and restarting, on the Stonebook I get this, with
ctwm 4.0.3-post

USER       PID  %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
axs       43515  0.1  0.0 219380  5400 ?        S    00:37   0:00 ctwm -W

So the large VSZ can't be do to ctwm running for a long time.

There's a lot less running on the Stonebook.

It's mystifying.
Aaron