if press h inside htop for quick help:
CPU
Blue : Low-priority threads
Green : Normal priority threads
Red : Kernel threads
Turquoise : Virtualization threads
but yellow?
if press h inside htop for quick help:
CPU
Blue : Low-priority threads
Green : Normal priority threads
Red : Kernel threads
Turquoise : Virtualization threads
but yellow?
In my case, yellow means that the CPU time is spent on virtualization (for VDS) and CPU is lost. Change your hosting provider.
Making an educated guess: you've got htop's detailed CPU time display on. Under the Black Night colorscheme, yellow is io-wait. Which makes sense for a database server.