Speaking of being on the bleeding edge of technology, a recent update/upgrade of my Debian server revealed a bug with man-db. Yes. man-db. Out of all places it could have happened, it happened here. It’s shameful!
After upgrading, you might see mandb taking up 100% of your cpu. And not only that, the upgrade is likely to hang on it.
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2653 811 man 20 0 21500 1256 488 R 100 0.1 154:39.62 mandb
This was found in man-db version 2.5.6-4 but it’s already been fixed. You’ll just have to do an apt-get update followed by an apt-get upgrade. After that you should have man-db version 2.5.6-5
You can also look at the bug report here: