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.
Author Archives: Jay Jay
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.
3-cent microcontrollers
These look pretty interesting! What’s up with these 3-cent microcontrollers? (A review of the Padauk PMS150C and friends).
MacBook Pro Retina resolution
So my mate CK put me onto RDM which you can use to improve the graphical resolution on your MacBook Pro Retina display. So much better.
A Whole Website in a Single HTML File
Via Hacker News today: A Whole Website in a Single HTML File. As can be seen over here.
MTU 1492
This NBN Modem Routers ISP Settings says Dodo settings are:
Protocol: PPPoE VLAN ID: 100 MTU: auto or 1492 login: Dodo provided username/password RSP Supplied equipment auto configures
Good to know!
SSL Server Test
Today I came across: SSL Server Test.
Taking Back the Internet
PDOStatement::fetchAll()
I’m reading the source code for PDOStatement::fetchAll().