XINFOIntrospect a stream, its groups, or its consumers.
| Syntax | XINFO STREAM key | GROUPS key | CONSUMERS key group | HELP |
| Group | stream |
| Arity | -2 |
| Since | 1.0.0 |
| Flags | readonly |
| Complexity | STREAM: O(1). GROUPS: O(G*N) — 'lag' is a linear walk of every entry, once per group. CONSUMERS: O(C) |
| Redis compatibility | differs: STREAM / GROUPS / CONSUMERS / HELP only — XINFO STREAM FULL is absent; radix-tree-keys and nodes are synthetic (we have no radix tree), entries-read is approximated, and CONSUMERS omits 'inactive' |