W3 Total Cache
help diagnosing "waiting..." slowdowns (6 posts)

  1. doctorproctor
    Posted 4 years ago #

    I'm running W3TC and WP latest, and other than the preload page cache problem reported earlier it seems to work well. But the biggest slowdown on my site happens in a random manner right after the browser connects, and (on Firefox) the status bar says "Waiting for [hostname]..."

    This behavior occurs perhaps every dozen or so loads, can take between 5-30 seconds to clear, does not happen with particular pages, and seems to happen whether or not I'm logged in (W3TC is set to serve cached pages to non-logged in users only, though other cache settings may be involved). I'm on Bluehost Pro (which sped things up a bit), have checked CPU throttling/bandwidth and no biggies, and have checked mysql_slow_queries and no biggies. I have checked error logs, and there are only a few plugin errors, but one includes W3TC: w3_url_format() call generates a fatal PHP error...should I be worried about that one? (Full error at bottom.)

    Recommendations for other ways to diagnose this maddening "Waiting..." error? I can't believe it's the server itself, and did not experience this before I installed W3TC, so I'm almost sure there's a setting somewhere I don't have optimized.

    Thank you for your input!

    Jim P.


    [22-Sep-2011 14:53:09] PHP Fatal error: Call to undefined function w3_url_format() in /home2/envirolc/public_html/wp/wp-content/plugins/w3-total-cache/lib/W3/Plugin/PgCacheAdmin.php on line 213

  2. tgeorge
    Posted 4 years ago #

    Concerning the "w3_url_format" error, I had the same problem, and I solved it like this :


  3. doctorproctor
    Posted 4 years ago #

    Thank you! Will try this...did this error delay response at all from your server?

  4. doctorproctor
    Posted 4 years ago #

    Okay, the above was great but did not address my problem, which I sort of hear in this posting as well. I'm strongly suspecting that page caching can occasionally take a ton of time to do: this seems to have been the culprit with my last page load, which took nearly 30 seconds...crazy. Does anyone else suspect that page caching (the reason I got W3TC in the first place) can occasionally be a huge slowdown?

  5. andreasnrb
    Posted 4 years ago #

    On w3_url_format it will be fixed in next version.
    With regards to the other problem you can submit a bug submission form from the support tab of the plugin because we are unable to duplicate and need to learn more.

  6. Frederick Townes
    Plugin Author

    Posted 4 years ago #

    @doctorproctor, that sounds like typical share hosting issue, no?

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