Redis and Woo / WPML bug

  • Hello,

    I have been having an issue with Redis & Woocommerce since the summer but can’t figure out the solution. Could you help me understand it?

    This is what they send me via mail:

    Thanks for getting back to us on this. From what I can see, the product attribute lookup table is still constantly regenerating. At times, the database entries and the number of products listed in the regeneration button (that is the?(120)?shown in your screenshot) do not match unless the Redis Object Cache is cleared.

    It appears that you may need to add options to your Redis ignored groups. I would do this only as a test.

    Please enable?WP_DEBUG?and?WP_DEBUG_LOG?at the start of the test. (https://www.ads-software.com/documentation/article/debugging-in-wordpress/#example-wp-config-php-for-debugging)

    Redis?object cache allows?WordPress?users to exclude certain groups from being cached, which would cause the keys of the ignored groups never to be stored in?Redis. It can be done by using the?WP_REDIS_IGNORED_GROUPS?WordPress constant in the?wp-config.php?file.

    define( 'WP_REDIS_IGNORED_GROUPS', [ 'options']);

    This does not address the issue of the regeneration being generated on every page load, but it may give us an indication of why the process is not completing. Once we have run the test and have some results, please re-enable options, as this is a key component to Redis caching.

Viewing 15 replies - 1 through 15 (of 19 total)
  • Plugin Support Julie

    (@julieadrienne)

    Hey!

    WooCommerce works well with WordPress’ persistent object cache API, however WPML in one of the only few plugins that does not. We currently recommend not using WPML because of that.

    However you can ignore certain cache groups like options, which might make WPML work, but all WordPress options won’t be cached anymore.

    Thread Starter dyin

    (@dyin)

    Hello Julie, thank you for replying.
    I understand that WPML is the cause of many issues, but I can not do without. Most people in Europe live in a place where multiple languages are spoken.

    Could you help me with a guide? I really wish Redis were compatible with WPML. For the sake of us europeans ??

    Plugin Support Julie

    (@julieadrienne)

    I really wish Redis were compatible with WPML.

    We do too. It’s up to the WPML team to test their work against persistent object caching.

    Could you help me with a guide?

    A guide for what?

    Thread Starter dyin

    (@dyin)

    A guide to fix my issue with WPML. I do not understand the group options tbh.

    What is the exact issue for it. Don’t you guys have contacts with them? I think they are rather large.

    Plugin Author Till Krüss

    (@tillkruess)

    Sorry, we don’t have a guide to fix WPML. It’s up to the WPML team to ensure their plugin works with WordPress Caching API.

    Thread Starter dyin

    (@dyin)

    @julieadrienne This is what they told me (WPML). Is it correct? Does this impact my perfo?

    For clients that have encountered problems, the common solution/approach has been to add a cache group e.g. “WPML_TM_ICL_Translations::translations” to the “WP_REDIS_IGNORED_GROUPS” array which makes it bypass the Redis caching mechanism.

    I see clients have done this for pages as well.

    After doing a backup of your site, it is worth adding the following line to wp-config:

    define ( ‘WP_REDIS_IGNORED_GROUPS’,”WPML_TM_ICL_Translations::translations” );

    Thread Starter dyin

    (@dyin)

    They are also investigating some extra (helper) plugin. Not sure yet what it is.

    Plugin Support Julie

    (@julieadrienne)

    We’re not familiar with WPML, since it’s a paid plugin their support team must assist you.

    To answer your question, you can safely try adding:

    define( 'WP_REDIS_IGNORED_GROUPS', [
  'WPML_TM_ICL_Translations::translations',
] );
    Thread Starter dyin

    (@dyin)

    Thank you for the info. I will post what WPML support and let you know if it fixed things

    Thread Starter dyin

    (@dyin)

    adding the line did not appear to fix the issue

    I am also wondering if a redis response time of 500ms is normal …

    could the issue be related: Page Timeout – page 3 | www.ads-software.com

    • This reply was modified 11 months, 1 week ago by dyin.
    • This reply was modified 11 months, 1 week ago by dyin.
    Plugin Support Julie

    (@julieadrienne)

    How many Calls are you seeing in correlation with Time?

    Thread Starter dyin

    (@dyin)

    for some reason the performance of Redis suddenly improved greatly. The timing are around 70ms. Perhaps it was the latest update

    I will check the logs for errors (if they are still there)

    I am seeing the calls per unit of time at around 230

    • This reply was modified 11 months, 1 week ago by dyin.
    • This reply was modified 11 months, 1 week ago by dyin.
    Thread Starter dyin

    (@dyin)

    ok so I can comfirm that the error logs are gone and since the last update of the plugin the perfo is way better

    Plugin Support Julie

    (@julieadrienne)

    That’s great to hear!

    Thread Starter dyin

    (@dyin)

    @julieadrienne after 3 weeks and a gradual deterioration I’ve had my first timeout again.

    Same as all the other guys in this topic: Page Timeout – page 4 | www.ads-software.com

Viewing 15 replies - 1 through 15 (of 19 total)
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