Earlier today we started seeing increased response times in our data collection cluster. We identified the issue to be related with using the altid parameter which caused timeouts. The reason for this was a missing index in a mapping table that had not been added. Without this, some queries timed out.
We have updated the table with the correct index and run checks on all our storage nodes to make sure that performance is as expected.
We are truly sorry for the inconvenience that this may have caused you.