DEBUGDebug subcommands; SLEEP blocks the shard, other subcommands are tolerated as OK.
| Syntax | DEBUG SLEEP seconds | subcommand [args ...] |
| Group | server |
| Arity | -2 |
| Since | 1.0.0 |
| Flags | readonly, admin |
| Complexity | SLEEP: parks the ANSWERING shard's reactor thread for the duration (other shards keep serving). Everything else: O(1) |
| Redis compatibility | differs: SLEEP is the only subcommand with an effect and it blocks one shard, not the server; every other subcommand is accepted and answered OK without doing anything |