Redis

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Redis 8.6 delivers major performance gains, memory optimizations, new eviction policies, and enhanced time series and stream capabilities.

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Overview

Redis 8.6 GA introduces substantial performance improvements and memory reductions for hashes and sorted sets, adds idempotent XADD with IDMP/IDMPAUTO, new LRM eviction policies (volatile-lrm, allkeys-lrm), hot key detection via HOTKEYS command, TLS certificate-based client auth, NaN support in time series with COUNTNAN/COUNTALL aggregators, and vectorized distance calculations. It also includes memory histogram metrics, reduced syscalls, and optimized ACL checks. Note: avoid IDMP/IDMPAUTO with appendonly AOF without RDB preamble.