Wikidata maxlag, via the ApiMaxLagInfo hook
Wikidata tinkers with the concept of maxlag that has existed in MediaWiki for some years in order to slow automated editing at times of lag in various systems. Here you will find a little introduction to MediaWiki maxlag, and the ways that Wikidata hooks into the value, altering it for its needs. As you can…
What happens in Wikibase when you make a new Item?
A recent Wikibase email list post on the topic of Wikibase and bulk imports caused me to write up a mostly human readable version of what happens, in what order, and when, for Wikibase action API edits, for the specific case of item creation. There are a fair few areas that could be improved and…
Grafana, Graphite and maxDataPoints confusion for totals
The title is a little wordy, but I hope you get the gist. I just spent 10 minutes staring at some data on a Grafana dashboard, comparing it with some other data, and finding the numbers didn’t add up. Here is the story in case it catches you out. The dashboard The dashboard in question…
WMDE: Metrics & Data Gatherings
Below you will find an internal WMDE presentation covering the general area of WMDE Metric & Data Gatherings from 2016. This presentation follows on from the initial introduction to engineering analytics activities. The presentation skims through: WMDE Grafana dashboards The Wikimedia Analytics landscape Grafana & graphite Hadoop, Kafka, Hive & Oozie EventLogging, Mysql replicas &…
The break in Wikidata edits on 28 Jan 2016
On the 28th of January 2016 all Wikimedia MediaWiki APIs had 2 short outages. The outage is documented on Wikitech here. The outage didn’t have much of an impact on most projects hosted by Wikimedia. However due to most Wikidata editing happening through the API, even when using the UI, the project basically stopped for roughly…
WMDE: Engineering Analytics Activities
This is an internal WMDE presentation given at the start of “metric driven development” for the WMDE & Wikidata dev teams. The presentation is pretty bare bones but it provides a general overview of the plan and links to the current state of things. The main area of interest from the presentation is the…
Wikimedia Grafana graphs of Wikidata profiling information
I recently discovered the Wikimedia Grafana instance. After poking it for a little while here are some slightly interesting graphs that I managed to extract.