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faq.haml
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!!! html
%html
%head
= Haml::Engine.new(File.read("assets/haml-includes/head.haml")).render
%body{:onload => "animateBackground();"}
= Haml::Engine.new(File.read("assets/haml-includes/fullscreen.haml")).render
.content
= Haml::Engine.new(File.read("assets/haml-includes/logo.haml")).render
= Haml::Engine.new(File.read("assets/haml-includes/menu.haml")).render
.page
%h1 Frequently Asked Questions
%p.question
The numbers in the meters occasionally change colors when the bar is full.
Is this a bug?
%p.answer
No, that's the expected behavior. :) It's like when progress bars fill
over the number on GUI apps.
%p.question
The memory meter in htop says a low number, such as 9%, when top shows
something like 90%! (Or: the MEM% number is low, but the bar looks almost
full. What's going on?)
%p.answer
The number showed by the memory meter is the total memory
%i used
by
processes. The additional available memory is used by the Linux kernel
for buffering and disk cache, so in total almost the entire memory is
in use by the kernel. I believe the number displayed by htop is a more
meaningful metric of resources used: the number corresponds to the green
bars; the blue and brown bars correspond to buffers and cache, respectively
(as explained in the Help screen accessible through the F1 key). Numeric
data about these is also available when configuring the memory meter to
display as text (in the Setup screen, F2).
%p.question
Why doesn't htop feature a SWAP column, like top?
%p.answer
It is not possible to get the exact size of used swap space of a process.
Top fakes this information by making SWAP = VIRT - RES, but that is not a
good metric, because other stuff such as video memory counts on VIRT as
well (for example: top says my X process is using 81M of swap, but it also
reports my system as a whole is using only 2M of swap. Therefore, I will
not add a similar Swap column to htop because I don't know a reliable way
to get this information (actually, I don't think it's possible to get an
exact number, because of shared pages).
%p.question
How can I be notified of new releases?
%p.answer
You can join the
= succeed "!" do
%a{:href => "mailinglist.html"} htop mailing list
%p.question
What does the 'h' in 'htop' stand for?
%p.answer
Yes, I did receive emails asking this! :)
%br/
%br/
Well, the short explanation is a little obvious: the "h" stands
for "Hisham", my name. :)
%br/
%br/
The long explanation is that what inspired me to write htop was
= succeed "," do
%a{:href => "https://web.archive.org/web/20180405002216/http://pinfo.alioth.debian.org/"} pinfo
%br/
%br/
%br/