Redis Knowledge Hub
Master Redis with our in-depth guides, FAQs, code examples, and error solutions to navigate Redis with ease..
FAQs
Is Redis free?How to install Redis on Mac?How to check if Redis is running?How to restart Redis?Does Redis persist data?How to install Redis on Ubuntu?How to stop Redis server?How to see Redis version?How long does Redis store data?How is Redis so fast?How to connect to Redis server?Is Redis Multithreaded?Does Redis Use HTTP?Is Redis a Relational Database?How to Refresh Redis Cache in Spring Boot?How to Use Redis with Django?Can Redis Store JSON?How to Clear the Redis Cache?How to Close Redis Connection?How Does Redis Handle Concurrency?How to Create Table in Redis?How Many Requests Can Redis Handle?How Much Data Can Redis Store?How to Clear Redis Queue?Where Does Redis Store Data in Docker?Should Redis Be Used in Docker?How to Expose Redis Kubernetes?How to Connect to Redis in Kubernetes?What is Redis Enterprise Proxy and how does it work?Is Redis Enterprise Operator free to use?Is Redis Enterprise free to use?What are the differences between Redis Enterprise and Redis Open Source?How can you stop Redis Enterprise?What is the default password for Redis Enterprise?What are the differences between Redis Enterprise and Google Cloud Memorystore?What are the system requirements for running Redis Enterprise?How can you configure the Transport Layer Security (TLS) in Redis Enterprise?Is Redis expensive to use?How can you set up Redis Enterprise on AWS?How can you restart a Redis Enterprise cluster?What is the pricing model for Redis Enterprise when deployed on-premise?How can you configure and use Redis Enterprise with Sentinel?How can you install and configure Redis Enterprise on OpenShift?How much does Redis Enterprise cost?What is Redis Enterprise Proxy and how does it work?Is Redis Enterprise Operator free to use?Is Redis Enterprise free to use?What are the differences between Redis Enterprise and Redis Open Source?How can you stop Redis Enterprise?What is the default password for Redis Enterprise?What are the differences between Redis Enterprise and Google Cloud Memorystore?What are the system requirements for running Redis Enterprise?How can you configure the Transport Layer Security (TLS) in Redis Enterprise?Is Redis expensive to use?How can you set up Redis Enterprise on AWS?How can you restart a Redis Enterprise cluster?What is the pricing model for Redis Enterprise when deployed on-premise?How can you configure and use Redis Enterprise with Sentinel?How can you install and configure Redis Enterprise on OpenShift?How much does Redis Enterprise cost?Why is there no eviction policy in Redis and how can it be configured?How can I create and restore a backup in Redis?How can you check the eviction policy in Redis?How can you monitor key evictions in Redis?How can you set the eviction policy in Redis?How can I access an AWS Redis instance from outside the VPC?How can you scale WebSockets with Redis?What are the scaling limits of Redis and how can they be addressed?How can one scale Redis using Sentinel?How can you scale Redis in a Kubernetes environment?How can you implement auto-scaling in Redis?Is Redis scalable?How can you scale Redis Pub/Sub?What are the limitations of a Redis cluster?How does Redis handle stream scalability?How can you scale a Redis instance in Google Cloud Memorystore?How can we scale Redis Pub/Sub?What is the Redis replication buffer limit and how can it be adjusted?What is the Redis replication backlog and how does it work?What is redis replication priority and how is it used?How can you force a Redis slave to become a master?How can you force a Redis slave to sync with its master?What is Redis replication lag on AWS and how can you minimize it?How can Redis replication be used with a load balancer?What is the Redis replication timeout and how can it be set?How can you set up Redis replication using Helm?What are the differences between Redis replication and standalone setup?What is the difference between Redis master-replica setup and clustering?How can I set up Redis replication?How can you check the Redis replication status?What is the difference between Redis partitioning and sharding?How can you use namespaces in a Redis cluster?What are the differences between Redis Cluster and Master-Slave setup?What is the default port for a Redis cluster and how can it be changed?How can you set up a Redis cluster without replicas?How can you set up a Redis cluster without persistence?How can you set up a Redis cluster with 2 nodes?What is the difference between a Redis cluster and a replication group?What determines the throughput of Redis Pub/Sub?How does the performance of Redis hash data type compare to other data types?How does the HMGET command impact performance in Redis?How does the performance of Redis HSCAN command work?How does deletion operation affect performance in Redis?What causes latency in Redis replication and how can it be minimized?How does Redis performance compare to MySQL?How does Redis performance compare to SQL databases?How does the performance of Redis compare to PostgreSQL?How can you manage TTL (Time to Live) in a Redis Cluster?How can you configure a connection pool in Redis?What is the difference between Redis Cluster and a Redis connection pool?How can one configure a Redis cluster?How can you remove a node from a Redis cluster?What is the minimum number of nodes required in a Redis cluster?What is the difference between Redis sharding and clustering?How scalable are Redis streams?What is Redis replication with multi-master?How does locking affect Redis performance?
Guides
Understanding Redis Performance and 6 Ways to Boost PerformanceRedis Default Port, How to Change It, and 4 Alternative Port OptionsSelf-Hosted Redis vs ElastiCache - The Ultimate ComparisonRedis vs MongoDB - The Ultimate ComparisonRedis Sorted Sets: 9+ Proven Best PracticesRedis to Valkey - Ultimate Migration GuideIntroduction to Valkey (The OSS Redis Fork)Master Redis Cache - Everything You Need To KnowUnderstanding Heroku Redis Pricing - In-Depth GuideGoogle Memorystore Redis Pricing - Everything You Need To Know
Errors
could not connect to redis at 127.0.0.1:6379: connection refusedredis error server closed the connectionredis.exceptions.responseerror: value is not an integer or out of rangeredis.exceptions.responseerror movedredis.exceptions.responseerror noauth authentication requiredredis-server failed to start advanced key-value storespring boot redis unable to connect to localhost 6379unable to configure redis to keyspace notificationsredis.clients.jedis.exceptions.jedismoveddataexceptioncould not get resource from pool redisfailed to restart redis service unit redis service not foundjob for redis-server.service failed because a timeout was exceededfailed to start redis-server.service unit redis-server.service is maskedfailed to stop redis-server.service unit redis-server.service not loadedfailed to open redis db connectionredis health check failedredis failed to refresh slots cachecould not connect to redis at 127.0.0.1:6379: connection refused dockerfailed to start redis service unit redis service not foundredis failed to start advanced key value storeredis cluster state failredis warning overcommit_memory is set to 0cannot find save handler 'redis'aws redis create-failedredis auth failedredis cant save in background fork cannot allocate memoryinvalid service redis class redis does not existbrew services start redis not workingcannot access redis.clients.jedis.jedispoolconfigcannot connect to a redis sentinelcannot connect to redis awscannot find module 'redis'cannot import backend 'channels_redis.core.redischannellayer'cannot obtain initial redis cluster topologycannot read property 'createclient' of undefined rediscould not connect to redis name or service not knowncelery cannot connect to rediscircuitbreaker 'redis' is open and does not permit further callsdocker redis warning: could not create server tcp listening socketconnection to redis failed after 2 failuresconsumer cannot connect to rediscould not find cache store adapter for redis_cache_storefailed reading data from redis connection socketpython no module named redislaravel redis queue not workingmagento 2 redis session issuecannot load such file -- redis/connection/hiredisphp_network_getaddresses getaddrinfo failed redisredis big key problemredis bind cannot assign requested addressredis cache not workingredis cannot assign requested addressredis could not get a resource from the poolredis cache timeout exceptionredis clients jedis exceptions jedisconnectionexceptionredis clients jedis exceptions jedisconnectionexception unexpected end of streamredis clients jedis exceptions jedisdataexception noauth authentication requiredredis command timeout exceptionredis could not create server tcp listening socketredis expire not workingredis failed opening rdb for saving permission deniedredis flushall not workingredis hotkey problemredis moved errorredis moved exceptionredis requirepass not workingredis server service failed with result resourcesredis server service failed with result start limit hitredis-cli could not connect to redisredis.exceptions.busyloadingerror: redis is loading the dataset in memoryredis.exceptions.connectionerror: max number of clients reachedredis server service failed with result timeoutredis.exceptions.connectionerror: connection closed by server.redis-cli certificate verify failedredis ttl not workingunable to locate package redis-stack-serverredis-cli not workingredis.exceptions.responseerror: unknown command 'json.set'require cannot load such file redis loaderrorunable to connect to redis spring bootthundering herd problem redisspring.cache.redis.time-to-live not workingunable to locate package redis-tools kali linuxspring boot redis health check failedspring boot redis cache not workingvalue sent to redis cannot be nullunable to locate package redis-cliunit redis service entered failed stateunable to locate package redis-serverunable to locate package redis toolsunable to locate package rediswindows could not start the redis service on local computerredis timeout exception c#unable to load dynamic library 'redis.so'cannot create directory '/bitnami/redis': permission deniedcannot connect to redis server from outsidecannot connect to redis-server at specified addresscelery cannot connect to amqp rediscannot connect to redis server windowscannot connect to redis-server vmware ubuntucannot find module redis lambdacannot shutdown redis-serverheroku error connecting to redis on localhost 6379cannot start sidekiq error connecting to redisgem redis getaddrinfo name does not resolveissue redis restart automaticallyerror moved 4757 172.17.0.4 6379 redis-cluster kuberneteskubernetes redis connection refusedredis not evictingredis cluster flushall not workingredis cluster error connectiontimeouterror connection timeoutredis cluster failed to refresh slots cacheredis cluster error ttl exhaustedredis cluster cannot be connectedredis connection error noauth authentication requiredredis could not initialize cluster slots cacheredis cluster node is not emptyredis cluster retry deadline exceededredis connection error 111redis network is unreachableredis sentinel failover not workingredis slave cannot connect to masterredis sentinel error connection reset by peerredis sentinel could not create tmp config fileredis sentinel failed to resolve hostnameredis sentinel does not switch masterredis too many results to unpack
Code Examples
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