Cinnamon rules seem to set file manager and other applications to nice -10

[LinuxOnTheDesktop]

The problem

When I copied a large file I noticed this:

It turns out that the 'Very High' niceness reported by that system monitor is niceness -10.

Now, my file-manager, Nemo, should not be at -10 niceness, because that's not sane and I have a Nemo ananicy rule to set it to nice 0. Nor should a lof of that other stuff be at -10.

Diagnosis

Playing around seem to show that, if ananicy is running, restarting Nemo gives it a -10 niceness. I found that if I removed the (default) ananicy Cinnamon rules, the whole problem went away. Note that simply stopping anaicy does not solve the problem, if Cinnamon (or possibly cinnamon-session as against cinnamon) is at -10. This suggests that Cinnamon propagates its ananicy-assigned -10 niceness to programs that it (CInnamon) is involved in launching.

Proposed remedy

Trust distro developers to nice their rather critical comments. So: just delete the Cinnamon rules and indeed issue a warning about creating any.

Ananicy: latest git, I think. (It would be nice were ananicy --version to work.)
Linux Mint 19.2 Cinnamon

[LinuxOnTheDesktop]

This problem persists. Indeed on my systems just now it has meant that the indexer of the launcher program 'Albert' got niced to -10. Not good.

[nefelim4ag]

You can just create PR and remove them, if they perform bad.

[LinuxOnTheDesktop]

I tried and I got into terrible trouble with git and specifically with gpg; I am unused to doing more than fetching with it. Why don't you just please delete the cinnamon.rules file?