See https://phabricator.wikimedia.org/T242453 linked on the report page
On Sun, Jul 26, 2020 at 6:55 PM Kingsley Idehen <kide...@openlinksw.com> wrote: > On 7/24/20 3:18 PM, Ryan Kemper wrote: > > Hi all, > > > > We experienced WDQS service disruptions on 2020/07/23. As a result > > there was a full outage (inability to respond to all queries) for a > > period of several minutes, and a more extended period of > > intermittently degraded service (inability to respond to a subset of > > queries) for 1-2 hours. > > > > The full incident report is available here: > > > https://wikitech.wikimedia.org/wiki/Incident_documentation/20200723-wdqs-outage > > > > Ultimately, we traced the proximate cause to a series of > > non-performant queries, which caused a deadlock in blazegraph, the > > backend for WDQS. We have placed a temporary block on the IP address > > in question and are taking steps to better define service availability > > expectations as well as processes to make detection of these events > > more streamlined going forward. > > > What was the problem query? > > I ask because I would like to try it against our Wikidata endpoint at: > https://wikidata.demo.openlinksw.com/sparql . > > We have an "Anytime Query" feature designed for these kinds of problems, > hence the vested interest in these kinds of problem queries. > > -- > Regards, > > Kingsley Idehen > Founder & CEO > OpenLink Software > Home Page: http://www.openlinksw.com > Community Support: https://community.openlinksw.com > Weblogs (Blogs): > Company Blog: https://medium.com/openlink-software-blog > Virtuoso Blog: https://medium.com/virtuoso-blog > Data Access Drivers Blog: > https://medium.com/openlink-odbc-jdbc-ado-net-data-access-drivers > > Personal Weblogs (Blogs): > Medium Blog: https://medium.com/@kidehen > Legacy Blogs: http://www.openlinksw.com/blog/~kidehen/ > http://kidehen.blogspot.com > > Profile Pages: > Pinterest: https://www.pinterest.com/kidehen/ > Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen > Twitter: https://twitter.com/kidehen > Google+: https://plus.google.com/+KingsleyIdehen/about > LinkedIn: http://www.linkedin.com/in/kidehen > > Web Identities (WebID): > Personal: http://kingsley.idehen.net/public_home/kidehen/profile.ttl#i > : > http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this > > > _______________________________________________ > Wikidata mailing list > Wikidata@lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/wikidata > -- Hi, do you like citation networks? Already 51% of all citations are available <https://i4oc.org/> available for innovative new uses <https://twitter.com/hashtag/acs2ioc>. Join me in asking the American Chemical Society to join the Initiative for Open Citations too <https://www.change.org/p/asking-the-american-chemical-society-to-join-the-initiative-for-open-citations>. SpringerNature, the RSC and many others already did <https://i4oc.org/#publishers>. ----- E.L. Willighagen Department of Bioinformatics - BiGCaT Maastricht University (http://www.bigcat.unimaas.nl/) Homepage: http://egonw.github.com/ Blog: http://chem-bla-ics.blogspot.com/ PubList: https://www.zotero.org/egonw ORCID: 0000-0001-7542-0286 <http://orcid.org/0000-0001-7542-0286> ImpactStory: https://impactstory.org/u/egonwillighagen
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