Mate-desktop-configs, rubygem-thin-1.8.0-1.fc34.x86_64 not allowing upgrade from 35 to 37

[mattdm (Matthew Miller)]

If you are running out of memory — and the out-of-memory killer stopping the process in an attempt to keep this from making the system responsive would explain what you’re seeing — see this:

DNF operations use large amount of RAM and may fail in low-memory environments

Problem The current design of the DNF package manager can cause it to use quite large amounts of memory (into the hundreds of megabytes) for most operations. This can mean that DNF operations fail (due to being killed by the kernel’s out-of-memory handler) in low-memory environments, especially systems or containers with 1GB or less of memory and no swap space. Cause This is due to parsing large amounts of repository metadata, and the exact amount of memory used varies over time and between …