Facebook Twitter Instagram
    TecAdmin
    • Home
    • FeedBack
    • Submit Article
    • About Us
    Facebook Twitter Instagram
    TecAdmin
    You are at:Home»Caching Server»Clearing the Redis Cache: A Step-by-Step Guide

    Clearing the Redis Cache: A Step-by-Step Guide

    By RahulNovember 18, 20183 Mins ReadUpdated:December 21, 2022

    Redis is an in-memory data structure store that can be used as a database, cache, and message broker. It supports a wide range of data structures, such as strings, hashes, lists, sets, and sorted sets, and it provides high performance and scalability.

    Advertisement

    To clear the Redis cache, you can use the `FLUSHALL` command. This command removes all keys from all databases in the Redis instance.

    Here’s a step-by-step guide on how to clear the Redis cache:

    1. Connect to Redis Server
    2. Connect to the Redis instance using the `redis-cli` command-line utility. You can specify the hostname and port of the Redis instance as arguments, or you can use the -h and -p options. For example:

      redis-cli -h 127.0.0.1 -p 6379 
      

      You can authenticate the connection using `-a ` when connecting to the server.

    3. Redis: Flush All Databases Cache
    4. Once connected, Use the `FLUSHALL` command to clear the entire cache. This command removes all keys from all databases in the Redis instance. It is an administrative command, and it is not recommended for use in production environments.

      FLUSHALL 
      

      The `FLUSHALL` command will return `OK` if the cache was successfully cleared. You can then exit the redis-cli utility by typing exit and pressing Enter.

      exit 
      

      That’s it! The Redis cache is now empty, and all keys have been removed from all databases in the Redis instance.

    5. Redis: Flush Single Database Cache
    6. Use the `FLUSHDB` command to clear a specific database. This command removes all keys from the currently selected database. You can specify the database number as an argument, or you can use the `SELECT` command to switch to the desired database before running FLUSHDB.

      FLUSHDB
      

      Select the database first and then flush it.

      SELECT 2 
      FLUSHDB
      

    7. Redis: Delete Specific Key Values
    8. Use the `DEL` command to delete specific keys. This command takes one or more keys as arguments, and it removes the specified keys from the current database.

      DEL key1 key2 key3
      

      Use the `KEYS` command to list all keys in the current database. This command takes a pattern as an argument, and it returns a list of keys that match the pattern. You can use this command to find and delete specific keys.

      KEYS *
      DEL $(KEYS pattern*)
      

    9. Redis: Set Expireation Time for Specific Key
    10. Use the `EXPIRE` command to set an expiration time on keys. This command takes a key and a number of seconds as arguments, and it causes the key to be deleted after the specified time has elapsed.

      EXPIRE key1 3600
      

    11. Redis: Remove Expireation Time for Specific Key
    12. Use the `PERSIST` command to remove the expiration time from a key. This command takes a key as an argument, and it removes the expiration time from the key if it has one.

      PERSIST key1
      

    Conclusion

    Note that the `FLUSHALL` command is an administrative command, and it is not recommended for use in production environments. If you want to clear only a specific database or a subset of keys, you can use the FLUSHDB or DEL commands instead. For more information, you can consult the Redis documentation or search online for tutorials and examples.

    I hope these tips and tricks are helpful! Let me know if you have any other questions.

    redis redis-cli
    Share. Facebook Twitter Pinterest LinkedIn Tumblr Email WhatsApp

    Related Posts

    How to Change Redis Max Memory

    How to Install Redis on Debian 11 Linux

    How to Install Redis on Debian 11 Linux

    How To Install Memcached on Ubuntu 20.04

    How To Install Memcached on Ubuntu 20.04

    Add A Comment

    Leave A Reply Cancel Reply

    Advertisement
    Recent Posts
    • Error: EACCES: permission denied, scandir (Resolved)
    • How To Install Python 3.11 on Ubuntu 22.04 / 20.04
    • How to Install Python 3.11 on Amazon Linux 2
    • An Introduction to the “./configure” Command: Compiling Source Code in Linux
    • How to Install PHP 8.x on Pop!_OS
    Facebook Twitter Instagram Pinterest
    © 2023 Tecadmin.net. All Rights Reserved | Terms  | Privacy Policy

    Type above and press Enter to search. Press Esc to cancel.