on web development.
By Steven Goodwin
This session was an amusing and informative round-up of the last 20 years of FOSDEM.
Happy 20th birthday FOSDEM, glad to have finally made it along to this gathering of Europe’s opensource developers.
Interested in running your own server using open hardware and software and help keep the internet free, then check out: https://freedomboxfoundation.org/
Speakers
Tools used:
NB: Commercial repurposed hardware was used.
Speakers
Area of research, Jsonnet. Used to template JSON files. NB There was a talk re Kubernetes Jsonnet usage yesterday.
Aim to provide consistency and improve reusability of dashboards.
By Florian Lautenschlager & Robert Hoffmann
They are building a GDPR compliant voice assistant that give users control over personal data.
Lovely but not usable by their team.
How did they improve the usage and culture in their organisation to their monitoring toolkit.
E.g. Adding links from metrics re tests failing to system logs related to that test.
Create a dashboard to facilitate frequent queries, e.g. Search by trace id or username.
Also they integrated the links into commonly used tools, like ticket systems or chat tools.
By Peter Zaitsev from Percona
Concurrency & latency
CPU
Look up USE method, e.g. Brendan Gregg
LoadAvg is interesting but what are the resources of the machine? Also this blurs IO and CPU usage.
Look at Saturation metrics, normalised load and ??
PSI – new feature Pressure Stall Information
Look runqlat a command line tool to look at run queue latency
CPU states to not:
IO wait is idle
Steal is CPU not available to your VM
Disk space used vs file length, think sparse files. These are missed in du – sh commands.
free look at available memory not free memory running out.
ping or mtr?
Area of research bcc tools