Redis FT.ALIASLIST lists aliases for an index
When you need to list aliases for an index, run `FT.ALIASLIST <index>`.
FT.ALIASLIST <index>What changed in Redis.
We scan this tool’s changelog a few times a day and keep the changes that would alter your agent’s next action: 4 since May 2026, each linked to its source.
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Redis
serviceredisChanges
INTRODUCED
JUL 292026
JUL 292026
Redis SUNIONCARD returns set-union cardinality
When you need the number of distinct members across multiple Redis sets, run `SUNIONCARD` with the number of keys followed by the set keys.
SUNIONCARD 2 <set-key-1> <set-key-2>JUL 292026
Redis XREAD and XREADGROUP add MAXCOUNT and MAXSIZE reply caps
When reading one or more streams on Redis 8.10.0+, add `MAXCOUNT` to cap total entries, `MAXSIZE` to cap reply bytes, or both. At least one entry is returned even if it exceeds `MAXSIZE`; if both caps are set, the first reached applies.
XREAD MAXCOUNT <entry_limit> MAXSIZE <byte_limit> STREAMS <stream_key> <last_seen_id>MAY 252026
Redis adds the INCREX window counter rate limiter
If the application needs an atomic window counter with bounds and expiration, evaluate Redis 8.8.0’s `INCREX` using an integer increment, an upper bound, and `ENX` with the window TTL.
INCREX <key> BYINT 1 UBOUND <limit> EX <seconds> ENX