Is 146% CPU in top possible and what does it mean?

Yes, in top you can see CPU values greater than 100%, and this is normal. In Linux, top shows CPU usage as a percentage relative to one core.

If you have a multi-core processor, the total CPU usage can exceed 100%. For example, if a process uses 1.5 cores, top will display 150%.

In your case, 146% CPU means the process is using approximately 1.46 CPU cores.

This is common in multi-threaded applications, such as those written in Go, where multiple goroutines can run in parallel on different cores.