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Tag: query service updater

Reducing Java JVM memory usage in Containers and on Kubernetes

For a while I have been running a Wikibase query service update script for WBStack, which is a Java application on a Kubernetes cluster. Part of that journey has included the updater using all available memory, hitting into the kubernetes memory limit and being OOM killed. The title of the post is a little verbose, but I wanted to include all of the keywords that might help people find the answers to the memory issues that I was running into.

Before getting into my weeds, if you want the answers head straight to https://developers.redhat.com/blog/2017/04/04/openjdk-and-containers/

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WBStack 2020 Update 1

WBStack has now been up and running for 6 months. During that time it has helped 70 people create 178 MediaWiki installs running Wikibase, a SPARQL query service and quickstatements, all at the click of a button, with a total of around 200,000 edits across all sites.

The most active site is currently virus-taxonomy.wiki.opencura.com which was developed during the Virtual Biohackathon on COVID-19 as a staging environment for “improving the taxonomy of viruses on Wikidata”. It currently stands at 20,000 edits, around 7000 Items.

Screenshot of the virus-taxonomy Wikibase Main Page, 19 April 2020

Thanks again to Rhizome, who run their very own Wikibase, for their support paying the Google Cloud bill in the early stages of this project.

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