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W3 Total Cache
[resolved] Usage of cdn_cron in W3TC (4 posts)

  1. M
    Member
    Posted 3 years ago #

    Hello,

    I'd like to know what do these crons do:
    w3_cdn_cron_queue_process and w3_cdn_cron_upload. From their name one might think they are linked to the CDN function of W3TC.

    Currently they run every 15 minutes which is redundant since on my site I don't use the CDN. What would happen if I set these to run every 12 or 24 hours, instead of 15 minutes? Would there be any bad side effects?

    Many thanks.
    http://wordpress.org/extend/plugins/w3-total-cache/

  2. Frederick Townes
    Member
    Plugin Author

    Posted 3 years ago #

    They keep track of files that need to be uploaded/updated/deleted on the CDN. They are not run when CDN is disabled on the general settings tab.

  3. ucallrt
    Member
    Posted 3 years ago #

    I'm getting query errors related to these processes. They're not all like the following, but they seem to relate to w3_cdn.

    [19-Apr-2011 17:58:17] WordPress database error MySQL server has gone away for query UPDATE wp_options SET option_value = 'a:16:{i:1303233951;a:1:{s:25:\"w3_cdn_cron_queue_process\";a:1:{s:32:\"40cd750bba9870f18aada2478b24840a\";a:3:{s:8:\"schedule\";s:25:\"w3_cdn_cron_queue_process\";s:4:\"args\";a:0:{}s:8:\"interval\";i:900;}}}i:1303234575;a:2:{s:13:\"dsq_sync_post\";a:1:{s:32:\"15a95e250b7a0be47b78f6aba74d8ab1\";a:2:{s:8:\"schedule\";b:0;s:4:\"args\";a:1:{i:0;s:5:\"19238\";}}}s:14:\"dsq_sync_forum\";a:1:{s:32:\"40cd750bba9870f18aada2478b24840a\";a:2:{s:8:\"schedule\";b:0;s:4:\"args\";a:0:{}}}}i:1303234744;a:1:{s:18:\"w3_cdn_cron_upload\";a:1:{s:32:\"40cd750bba9870f18aada2478b24840a\";a:3:{s:8:\"schedule\";s:18:\"w3_cdn_cron_upload\";s:4:\"args\";a:0:{}s:8:\"interval\";i:900;}}}i:1303236196;a:1:{s:22:\"w3_objectcache_cleanup\";a:1:{s:32:\"40cd750bba9870f18aada2478b24840a\";a:3:{s:8:\"schedule\";s:22:\"w3_objectcache_cleanup\";s:4:\"args\";a:0:{}s:8:\"interval\";i:3600;}}}i:1303236586;a:1:{s:18:\"w3_pgcache_cleanup\";a:1:{s:32:\"40cd750bba9870f18aada2478b24840a\";a:3:{s:8:\"schedule\";s:18:\"w3_pgcache_cleanup\";s:4:\"args\";a:0:{}s:8:\"interval\";i:7200;}}}i:1303236651;a:2:{s:18:\"w3_dbcache_cleanup\";a:1:{s:32:\"40cd750bba9870f18aada2478b24840a\";a:3:{s:8:\"schedule\";s:18:\"w3_dbcache_cleanup\";s:4:\"args\";a:0:{}s:8:\"interval\";i:3600;}}s:25:\"w3_cdn_cron_queue_process\";a:1:{s:32:\"40cd750bba9870f18aada2478b24840a\";a:3:{s:8:\"schedule\";s:25:\"w3_cdn_cron_queue_process\";s:4:\"args\";a:0:{}s:8:\"interval\";i:900;}}}i:1303237091;

    etc, etc....

  4. Frederick Townes
    Member
    Plugin Author

    Posted 3 years ago #

    When database caching is enabled, W3TC is checking every query to see if it can be cached, when disabled you will still see W3 in your logs.

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