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Show the Redis cache hit rate

harmlessRedis and Memcacheddebian, ubuntu
user@server
redis-cli INFO stats | grep -E '^(keyspace_hits|keyspace_misses|evicted_keys|expired_keys):'

Shows the hits and misses counted since the last start, plus evicted and expired keys. The hit rate is hits divided by the sum of both values, and for a WordPress object cache, values above 90 percent are common. If evicted_keys keeps rising, maxmemory is set too low.

Also searched as

  • is redis cache worth it
  • calculate redis hit rate
  • are keys evicted from redis

Related one-liners

All in Redis and Memcached

Show slow Redis commands (SLOWLOG)

$redis-cli SLOWLOG GET 10
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Check whether Redis is reachable

$redis-cli -h 127.0.0.1 -p 6379 ping
harmlessRedis and Memcached

Connect to Redis over a Unix socket

$redis-cli -s /run/redis/redis-server.sock ping
harmlessRedis and Memcached

Count Redis keys by pattern without blocking the server

$redis-cli -n 0 --scan --pattern '*transient*' | wc -l
harmlessRedis and Memcached

Count the keys in a Redis database

$redis-cli -n 0 DBSIZE
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Find the biggest keys in Redis

$redis-cli -n 0 --bigkeys
harmlessRedis and Memcached

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