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added: stream-idmp-duration and stream-idmp-maxsize to redis.conf (#14725)

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## Summary
Adds missing IDMP configuration parameters to redis.conf, previously
ommitted in #14615

## Changes
- Added `stream-idmp-duration` configuration parameter with
documentation
- Added `stream-idmp-maxsize` configuration parameter with documentation
- Both parameters were already implemented in the code (src/config.c,
src/server.h) but were missing from redis.conf

## Configuration Parameters

### stream-idmp-duration
- **Purpose**: Duration (in seconds) to remember IDMP identifiers for
duplicate detection
- **Range**: 1 to 86400 seconds (1 second to 24 hours)
- **Default**: 100 seconds
- **Modifiable**: Yes, via CONFIG SET at runtime

### stream-idmp-maxsize
- **Purpose**: Maximum number of IDMP identifiers to track per producer
per stream
- **Range**: 1 to 10000 entries
- **Default**: 100 entries
- **Modifiable**: Yes, via CONFIG SET at runtime
This commit is contained in:
Sergei Georgiev 2026-01-22 09:40:57 +02:00 committed by GitHub
parent 5dec7d3675
commit d099c10581
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@ -2145,6 +2145,30 @@ hll-sparse-max-bytes 3000
stream-node-max-bytes 4096
stream-node-max-entries 100
# Redis Streams support Idempotent Message Producer (IDMP) tracking to prevent
# duplicate message delivery. When producers send messages with IDMP identifiers
# (using XADD with IDMP or IDMPAUTO parameters), Redis tracks these identifiers to
# detect and reject duplicates within a configurable time window.
#
# stream-idmp-duration: Specifies how long (in seconds) Redis should remember
# IDMP identifiers for duplicate detection. After this duration expires, old
# identifiers are automatically removed. This prevents unbounded memory growth
# while allowing reasonable duplicate detection windows.
# Valid range: 1 to 86400 seconds (1 second to 24 hours)
# Default: 100 seconds
#
# stream-idmp-maxsize: Maximum number of IDMP identifiers to track per producer
# per stream. Once this limit is reached, the oldest identifiers are evicted to
# make room for new ones. This caps memory usage for IDMP tracking.
# Valid range: 1 to 10000 entries
# Default: 100 entries
#
# Note: These are default values for new streams. Individual streams can override
# these settings using the XCFGSET command.
#
# stream-idmp-duration 100
# stream-idmp-maxsize 100
# Active rehashing uses 1 millisecond every 100 milliseconds of CPU time in
# order to help rehashing the main Redis hash table (the one mapping top-level
# keys to values). The hash table implementation Redis uses (see dict.c)