Sluggish VM with 4 CPUs and 8 Gig of RAM

I have a fedora VM (now it is 41) where I assigned 4 CPUs and 8 Gig of RAM. It is really slow in responding to any action event when I right click and try to have the copy item.
I check system monitor so many times and I dont see and bad indication. Even sometimes, when I try to click something it freezes and the clcik works after 15-20 seconds. When type any command with sudo, I wait for 30-45 seconds to get the prompt for entering password.

I rebooted to be able to work, triggered plasma-monitor, to my surprise, I see CPU pie chart shooting between 90 and 95%

In the history pannel, I see that almost all CPUs are busy ver near to 100%, only i CPU at 49

.

When I switch to processes I dont see any excessive CPU usage

So how can I earth why the VM responds very slowly?
Thanks in advance

you need more cores to VM it defo is hitting the limtis already as seems to be soon the hard drive too there is the bottle necks since memory side it is all good still

basic rule setup VM setup workflow monitor resources when hitting limits increase until not hitting limits

Part of your issue may be the amount of data on the VM. It shows usage of 57 out of 68 GiB space (about 85%)

OK Jeff, what is the best way/tool to clean the hard drive? On windows, I use disk cleanup and it removes always uneeded files and service packs which always take a lot of place?

Are you running plasma monitor in the VM or the host? And what VM software are you using?

Also, on the top right try selecting All Processes instead of Own Processes

As already mentioned, whatever apps you are using cause the cpu to be rather loaded, with them all tasked at or very near 100%. The apps can be managed to reduce the load, or the VM can be given more RAM and CPU resources.

The drive space is a bit more manual and you would need to look at which parts of the data you have downloaded need to be kept and what may be removed, then do the removal based on needs. An alternative would be to enlarge the virtual disk for that VM to allow more space.

Most of us have at times needed to monitor disk space (used and free) to avoid serious problems that can occur with a full drive. Sometimes it is necessary to make changes.