See this graph for details about lag spikes. Every time lag is over 10 m, users accessing the Wikidata Query Service from the endpoint may experience slow responses, errors, and/or timeouts. Bots editing wikidata will be instructed to throttle, as the data from WDQS would be considered stale.
As I write this, we've had:
- A smaller spike from ~1125-1145 UTC that only affected our CODFW datacenter (Dallas, TX)
- A larger spike from ~1645-1900 UTC that affected both the CODFW and EQIAD (Herndon, VA) datacenter.