Considering this issue resolved. Redis is purring along, API calls are being processed. If you've spotted any issues that are still occurring, do get in touch.
Posted Apr 26, 2015 - 14:09 AEST
Monitoring
Okay, switched Redis providers, we're back to normal. Greatly apologise for the delay (and have raised a ticket with Pingdom to follow up on why their alerts are not currently coming through to my 24/7 phone, which would have led to this being resolved sooner).
Posted Apr 26, 2015 - 13:50 AEST
Identified
Just a quick addition: Searching is unaffected by this, but any Sphinx commands (stop, start, index) are not being processed. I've contacted the Redis provider, looking for a fast resolution there, but if there's no movement soon, will look into new infrastructure.
Posted Apr 26, 2015 - 11:48 AEST
Investigating
Looking into the cause, seems to be related to the Redis provider.