Support » Plugin: Redis Object Cache » No change after activation & connection?

  • Resolved Apfelbiss

    (@apfelbiss)


    Hello,

    I have read on the Internet that the use of Redis can also be read very well on the TTFB. However, I have not been able to determine any difference here. According to the plugin Redis is active and also the provider confirmed that Redis is running properly.

    The TTFB values look like this:
    – Activated cache (WP Rocket): approx. 12 ms
    – Deactivated cache: approx. 2.7-2.9 s

    The second value does not change when the Redis plugin is enabled, even with flushing the Redis cache via plugin.

    The plugin diagnostics say:

    Status: Verbunden
    Client: PhpRedis (v5.3.4)
    Drop-in: Valid
    Disabled: No
    Ping: 1
    Errors: []
    PhpRedis: 5.3.4
    Predis: Not loaded
    Credis: Not loaded
    PHP Version: 7.4.19
    Plugin Version: 2.0.18
    Redis Version: 3.2.12
    Multisite: No
    Filesystem: Working
    Global Prefix: "wp_"
    Blog Prefix: "wp_"
    WP_REDIS_PREFIX: "xxxxxxxxxx"
    WP_CACHE_KEY_SALT: "xxxxxxxxxx"
    Global Groups: [
        "blog-details",
        "blog-id-cache",
        "blog-lookup",
        "global-posts",
        "networks",
        "rss",
        "sites",
        "site-details",
        "site-lookup",
        "site-options",
        "site-transient",
        "users",
        "useremail",
        "userlogins",
        "usermeta",
        "user_meta",
        "userslugs",
        "redis-cache",
        "blog_meta"
    ]
    Ignored Groups: [
        "counts",
        "plugins",
        "themes"
    ]
    Unflushable Groups: []
    Drop-ins: [
        "advanced-cache.php v by ",
        "Query Monitor Database Class v by ",
        "maintenance.php v by ",
        "Redis Object Cache Drop-In v2.0.18 by Till Krüss"
    ]
Viewing 3 replies - 1 through 3 (of 3 total)
  • Plugin Author Till Krüss

    (@tillkruess)

    Hi @apfelbiss,

    Comparing WP Rocket (great plugin) to Redis Object Cache isn’t good. One serves static HTML files, the other run full PHP processes.

    However you should see a TTFB improvement when enabling Redis, if you don’t I’d suggest using New Relic or Blackfire to compare Redis on/off and see what’s causing it. My first guess would be Redis Server doesn’t have enough resources to perform well.

    Thread Starter Apfelbiss

    (@apfelbiss)

    Hello @tillkruess,

    I know that there are differences between WP Rocket and Redis, I just wanted to mention the value to show that low TTFB is also possible with this server.

    Blackfire seems to be a paid-only solution. After registering at New Relic, I am shown e.g. a “curl” install command for Linux Server.

    Is there no easy way to test/verify the redis function?

    Plugin Author Till Krüss

    (@tillkruess)

    Unfortunately, no. Running and optimizing Redis Server isn’t easy.

Viewing 3 replies - 1 through 3 (of 3 total)
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