Quine Release 2.2.0

Quine Release 2.2.0

Enhancements:

• New metrics identify which individual nodes are hot, ranked by mailbox backlog, message rate, and estimated wait. A low-cardinality node sitting on the critical path of a high-volume ingest throttles the whole stream; these metrics name that node by ID, so the bottleneck can be understood and the ingest query reworked.
• The results card now shows what type each value is, so the number 42 and the string "42" no longer look identical, and a real null no longer looks like the word null.
• Higher default outbound HTTP connection limits, so webhook outputs reach the throughput their parallelism setting asks for instead of being throttled below it.
• Reading a node with a long history no longer costs memory proportional to that history, so long-lived nodes stay affordable to query.

Bugfixes:

• A new snapshot-after-events setting lets a journaling deployment to control the number of journal events after the previous snapshot before creating a new snapshot, defaulting to 0 to snapshot on every sleep as before. Snapshots written by 2.1.x are migrated on read, but a data store this release has written cannot be read by 2.1.x, so downgrading after the upgrade is not possible. BREAKING-CHANGE
• Nodes keep processing messages under clock skew. The max-catch-up-sleep setting is removed and must be dropped from any configuration that sets it. BREAKING-CHANGE
• Server-Sent Events ingests no longer starve other requests to the same host, so an SSE stream can run alongside the rest of a deployment's HTTP traffic.