चूँकि Redis data को RAM में संग्रहीत करता है, memory management महत्वपूर्ण है — maxmemory limit, eviction policies, memory optimization, और monitoring को समझना Redis को memory खत्म हुए बिना reliably चलाने के लिए आवश्यक है।
maxmemory और eviction
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Set a memory limit so Redis doesn't consume all RAM:
maxmemory 2gb # cap Redis at 2GB
maxmemory-policy allkeys-lru # what to do when the limit is reached
When the limit is hit, Redis EVICTS keys per the policy (or rejects writes):
allkeys-lru → evict least-recently-used (any key) — common for a pure cache
allkeys-lfu → evict least-frequently-used
volatile-lru → evict LRU among keys WITH a TTL only
volatile-ttl → evict keys closest to expiry
noeviction → reject writes when full (good if Redis holds important data)