This is fun: A REXX XML PARSER.
Monthly Archives: January 2022
Big universe
Stumbled upon this homage to the old powers of ten video from the 70s: Our Universe is SO big, it’s mindblowing! 🤯 BBC.
drop_caches
If the ZFS ARC goes nuts with e.g. lots of arc_prune processes, try this:
# echo 3 > /proc/sys/vm/drop_caches
Thanks to Xe on #lobsters.
How to check which process is causing IO wait
The ‘wa’ state in `top` can indicate an IO wait, but to figure out what’s causing the IO wait try this command:
# ps aux | awk '$8 ~ /D/ { print $0 }' | less
You can read more here. Thanks to bsandro on #lobsters.
According to `man top`:
The status of the task can be one of: D = uninterruptible sleep I = idle R = running S = sleeping T = stopped by job control signal t = stopped by debugger during trace Z = zombie
ping!
Note to self: if you hear a computer go ‘ping’ and you’re not sure where it’s coming from, check the VMs on your Mac. End note.