Update docker.io/redis Docker tag to v8.6.0

v8.6.0

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This is the General Availability release of Redis 8.6 in Redis Open Source.

Major changes compared to 8.4

• Substantial performance improvements
• Substantial memory reduction for hashes (hashtable-encoded) and sorted sets (skiplist-encoded)
• Streams: XADD idempotency (at-most-once guarantee) with new IDMPAUTO and IDMP arguments
• New eviction policies - least recently modified: volatile-lrm and allkeys-lrm
• Hot keys detection and reporting; new command: HOTKEYS
• TLS certificate-based automatic client authentication
• Time series: support NaN values; new aggregators: COUNTNAN and COUNTALL

For more details, see the 8.6 release blog post.

Binary distributions

• Alpine and Debian Docker images - https://hub.docker.com/_/redis
• Install using snap - see https://github.com/redis/redis-snap
• Install using brew - see https://github.com/redis/homebrew-redis
• Install using RPM - see https://github.com/redis/redis-rpm
• Install using Debian APT - see https://github.com/redis/redis-debian

Operating systems we test Redis 8.6 on

• Ubuntu 22.04 (Jammy Jellyfish), 24.04 (Noble Numbat)
• Rocky Linux 8.10, 9.5
• AlmaLinux 8.10, 9.5, 10.1
• Debian 12 (Bookworm), Debian 13 (Trixie)
• macOS 14 (Sonoma), 15 (Sequoia)

New Features (compared to 8.6-RC1)

• #​14695 Keys memory size histograms

Performance and resource utilization improvements (compared to 8.6-RC1)

• #​14714 Optimize user ACL permission verification
• #​14692 Optimize peak memory metric collection
• #​14739 Avoid allocating and releasing list node in reply copy avoidance
• #​14713 Reduce per command syscalls by reusing cached time when hardware monotonic clock is available
• #​14726 Optimize XREADGROUP CLAIM
• #​13962 Vector set: replace manual popcount with __builtin_popcountll for binary vector distance (Intel, AMD, ARM)
• #​14474 Vector set: vectorized the quantized 8-bit vector distance calculation (Intel, AMD)
• #​14492 Vector set: vectorize binary quantization path for vectorsets distance calculation (Intel, AMD)

Configuration parameters

• #​14719 cluster-slot-stats-enabled - per-slot resource consumptions statistics to collect
• #​14695 key-memory-histograms collect memory consumption histograms per data type

Metrics

• #​14695 db0_distrib_lists_sizes, db0_distrib_sets_sizes, db0_distrib_hashes_sizes, db0_distrib_zsets_sizes

known bugs and limitations

• Streams: avoid using XADD with the new IDMP or IDMPAUTO options when using appendonly yes with aof-use-rdb-preamble no (non default).
  This limitation will be removed in the next patch.

v8.4.1

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Update urgency: SECURITY: There are security fixes in the release.

Security fixes

• RedisTimeSeries/RedisTimeSeries#1837, RedisJSON/RedisJSON#1474 Hide Personally Identifiable Information from server log
• RedisBloom/RedisBloom#936 Cuckoo filter: crash on RDB load on 0 buckets (MOD-11593)
• RedisBloom/RedisBloom#945 Bloom filter: crash on RDB load on large number of filters (MOD-11590)

Bug fixes

• #​14637 Atomic slot migration: wrong adjacent slot range behavior
• #​14567 Atomic slot migration: support delay trimming slots after finishing migrating slots
• #​14746 CLUSTER SLOT-STATS: Fix few memory tracking bugs
• RedisTimeSeries/RedisTimeSeries#1864 Atomic slot migration: time series limitations (MOD-13611)
• RediSearch/RediSearch#6973 Correct empty string token counting in byteOffset calculations to ensure accurate text position tracking (MOD-11233)
• RediSearch/RediSearch#6995 Prevent FT.INFO command fanout to replicas to reduce unnecessary cluster traffic
• RediSearch/RediSearch#7154 Display Background Indexing OOM warning in FT.AGGREGATE when memory limits are approached (MOD-11817)
• RediSearch/RediSearch#7219 Resolve concurrency issue in FT.AGGREGATEreducer that caused intermittent errors (MOD-12243)
• RediSearch/RediSearch#7255 Correct BM25STD underflow wraparound to prevent incorrect scoring (MOD-12223)
• RediSearch/RediSearch#7264 Ensure accurate totalDocsLen updates to maintain correct document statistics (MOD-12234)
• RediSearch/RediSearch#7275 Report used memory as unsigned long to prevent overflow (RED-169833)
• RediSearch/RediSearch#7350 FT.CREATE with LeanVec parameters on non-Intel architectures (RED-176382)
• RediSearch/RediSearch#7371 Validate search-min-operation-workers min value correctly (MOD-12383)
• RediSearch/RediSearch#7430 Prevent coordinator deadlock in FT.HYBRID queries by avoiding index read lock (MOD-12489)
• RediSearch/RediSearch#7435 Ensure full profile output on timeout with RETURN policy in FT.PROFILE (MOD-12320)
• RediSearch/RediSearch#7446 Remove outdated validation from debug aggregate in cluster mode (MOD-12435)
• RediSearch/RediSearch#7455 Ensure internal cursors are deleted immediately in cluster mode (MOD-12493)
• RediSearch/RediSearch#7458 Correct GC regression that caused stability issues (MOD-12538)
• RediSearch/RediSearch#7460 Prevent potential double-free on error path in Fork GC (MOD-12521)
• RediSearch/RediSearch#7499 Propagate HGETALL command in HDT mode (MOD-12662)
• RediSearch/RediSearch#7534 Reduce number of worker threads asynchronously to prevent performance degradation (MOD-12252, MOD-11658)
• RediSearch/RediSearch#7553 Handle WITHSCORES correctly when SCORE is sent alone without extra fields in coordinator (MOD-12647)
• RediSearch/RediSearch#7560 Properly handle connection closing in IO thread at shutdown and fix searchRequestCtx freeing on error (MOD-12699)
• RediSearch/RediSearch#7685 Resolve cursor logical leak that could lead to resource exhaustion (MOD-12807)
• RediSearch/RediSearch#7710 Support for WITHCOUNT in FT.AGGREGATE (MOD-11751)
• RediSearch/RediSearch#7794 Correctly handle binary data with embedded NULLs to prevent crashes (MOD-13010)
• RediSearch/RediSearch#7812 Correct SVS GC for no-workers case (MOD-12983)
• RediSearch/RediSearch#7815 Fix command routing in cluster mode by not relying on shard index (MOD-13049)
• RediSearch/RediSearch#7823 Support vector blob only through parameter in FT.HYBRID(MOD-13123)
• RediSearch/RediSearch#7873 Handle warnings in empty FT.AGGREGATE replies in cluster mode (MOD-12640)
• RediSearch/RediSearch#7897 Remove asserts from DownloadFile to prevent crash (MOD-13096)
• RediSearch/RediSearch#7901 Support multiple warnings in reply to prevent warning loss (MOD-13252)
• RediSearch/RediSearch#7903 Eliminate memory leak in FT.HYBRID queries with Active-Active enabled (MOD-13143)
• RediSearch/RediSearch#7886 Remove non-TEXT fields from spec's keys dictionary to prevent incorrect field handling (MOD-13150)
• RediSearch/RediSearch#7905 Remove non-TEXT fields from spec's keys dictionary and refactor keys dict (MOD-13150, MOD-13151)
• RediSearch/RediSearch#7978 Avoid using negative key position values during command registration (MOD-13332)
• RediSearch/RediSearch#8052 Resolve incorrect results when using LOAD * with FT.HYBRID (MOD-12736, MOD-13556)
• RediSearch/RediSearch#8083 Correct FULLTEXT field metric count accuracy (MOD-13432)
• RediSearch/RediSearch#8089 Handle edge case in clusterset (MOD-13562)
• RediSearch/RediSearch#8151 Correct FT.PROFILE shard total profile time calculation (MOD-13735, MOD-13181)
• RediSearch/RediSearch#8153 Resolve config registration issue (RED-171841)
• RediSearch/RediSearch#7449 Ensure FT.HYBRID respects timeout settings (MOD-11004)
• RediSearch/RediSearch#7238 Initialize GIL_TIME properly for FT.PROFILE (MOD-12553)
• RediSearch/RediSearch#7453 Error behavior on early bailout and split OOM warning for shard and coordinator (MOD-12449)
• RediSearch/RediSearch#7615 Parameter numDocs from non-optimized Wildcard iterator (MOD-12392)
• RediSearch/RediSearch#7165 (Redis Enterprise only) FT.DROPINDEX as touches-arbitrary-keys for proper cluster handling causing crash on A-A (MOD-11090)
• RediSearch/RediSearch#7023 (Redis Enterprise only) Ensure all FT.SUG* commands are hashslot-aware to prevent cluster routing errors (MOD-11756)

Performance and resource utilization improvements

• RediSearch/RediSearch#7496 Vector search performance improvements (MOD-12011, MOD-12063, MOD-12629, MOD-12346)
• RediSearch/RediSearch#7519 Reduce number of worker threads asynchronously to improve resource utilization (MOD-12252, MOD-11658)
• RediSearch/RediSearch#7694 Use asynchronous jobs in GC for SVS to reduce blocking (MOD-12668)
• RediSearch/RediSearch#7730 Support filter_policy and batch_size parameters for vector similarity search tuning (MOD-13007, MOD-12371)
• RediSearch/RediSearch#7782 Resolve SVS GC failures when worker threads are disabled (MOD-12983)
• RediSearch/RediSearch#7572 Implement ASM state machine on notifications (MOD-12170)
• RediSearch/RediSearch#7829 ASM-aware search flow for Active-Active deployments (MOD-12171, MOD-12169)
• RediSearch/RediSearch#7589 Support multiple slot ranges in search.CLUSTERSET for flexible cluster topology updates (MOD-11657)
• RediSearch/RediSearch#7862 Support subquery count in FT.HYBRID (MOD-11858, MOD-13146)
• RediSearch/RediSearch#7893 Request policy support for cursor operations (MOD-13146, MOD-9573, MOD-8104)
• RediSearch/RediSearch#8087 Warning when cursor may give inaccurate results due to Active-Active replication (MOD-12899)
• RediSearch/RediSearch#7445 Remove outdated validation from Debug Aggregate in cluster mode (MOD-12435)
• RediSearch/RediSearch#7384 Reduce index load from RDB temporary memory overhead (MOD-12212)

Metrics

• RediSearch/RediSearch#7960 Persist query warnings across cursor reads (MOD-12984)
• RediSearch/RediSearch#7612 Track maxprefixexpansions errors and warnings in info (MOD-12417)
• RediSearch/RediSearch#7872 Handle warnings in empty FT.AGGREGATE replies in cluster mode (MOD-12640)
• RediSearch/RediSearch#7900 Support multiple warnings in reply (MOD-13252)
• RediSearch/RediSearch#7576 Track OOM errors and warnings in info (MOD-12418)
• RediSearch/RediSearch#7507 Track timeout errors and warnings in info (MOD-12419)
• RediSearch/RediSearch#7341 Rename FT.PROFILE counter fields for clarity (MOD-6056)
• RediSearch/RediSearch#7436, RediSearch/RediSearch#7427 Enhance FT.PROFILE with vector search execution details (MOD-12263)
• RediSearch/RediSearch#7573 Debug support for FT.PROFILE command (MOD-12627)
• RediSearch/RediSearch#7736 Add Internal cursor reads metric to cluster FT.PROFILE output (MOD-12414)
• RediSearch/RediSearch#7692 Declare query error struct on _FT.CURSOR PROFILE (MOD-12955)
• RediSearch/RediSearch#7848 Store and display shard ID in profile output (MOD-12321)
• RediSearch/RediSearch#7422 Track syntax and argument errors in query error metrics (MOD-12416)
• RediSearch/RediSearch#7552 Add active_io_threads metric (MOD-12069, MOD-12695)
• RediSearch/RediSearch#7622 Add active_coord_threads metric (MOD-12694, MOD-12069)
• RediSearch/RediSearch#7564 Add active_worker_threads metric (MOD-12694, MOD-12069)
• RediSearch/RediSearch#7626 Add *_pending_jobs metrics for job queues (MOD-12069)
• RediSearch/RediSearch#7658 Add pending workers admin jobs metric (MOD-12069, MOD-12791)
• RediSearch/RediSearch#7731 Add active_topology_update_threads metric (MOD-12069, MOD-12790)
• RediSearch/RediSearch#7760 Extend indexing metrics for more detailed performance data (MOD-12070)

Configuration parameters

• RediSearch/RediSearch#7083 Add default scorer configuration option (MOD-10037)