Sometime back I noticed that whenever I run my favourite command, viz.
journalctl -xn -f -l
it was taking more time than usual. So, I thought to dig more into it and finally found that the following command:
sudo journalctl --disk-usage
showed that journalctl was using some huge space in tune of about 4GB. So, the solution was simple, vaccum the journal entries and the command to do so is :
sudo journalctl --vacuum-size 90M
Checking journalctl size after that confirms the size is reduced and after that indeed the above journal command takes no time 🙂