[Plugin: WP Super Cache] Slowdowns with Super Cache (during garbage cleanups)

  • israelshirk

    (@israelshirk)


    14 years, 2 months ago

    I just did a WPMU installation/theming solution for a news organization which has a pretty large number of articles (15,000+ with quite a few new ones every week) – arbiteronline.com. It also experiences quite a bit of traffic.

    Super Cache works great, with one caveat – it has major slowdowns during garbage cleanups.

    It looks like it handles building up the cache well, but every garbage cleanup period, it basically takes the server’s load to 100% for between two and three minutes, and the server goes totally unresponsive for that time.

    Is there a way to handle the cleanup more gracefully or to limit it to a longer timescale for less recent posts?

    Thanks!
    Israel

Viewing 3 replies - 1 through 3 (of 3 total)
  • Donncha O Caoimh (a11n)

    (@donncha)

    14 years, 2 months ago

    How long is your expiry? Shorten it down a lot and that will help.

    Thread Starter israelshirk

    (@israelshirk)

    14 years, 2 months ago

    We did that and it resulted in much slower page loads across the board… The issue then is that we have a *very* large distribution of which pages are hit, somewhat different from the normal distribution curve where recent posts are significantly more likely to be hit.

    I might try to take a look and see if there’s a more efficient way to handle some of the cleanup… hmmmm…

    Donncha O Caoimh (a11n)

    (@donncha)

    14 years, 2 months ago

    You’ve got a few options then:

    1. Try to improve the dynamic speed of your site by profiling it and removing any slow plugins or by throwing hardware at the problem.
    2. Use the experimental object cache support in WP Super Cache and a memcached backend.
    3. Use batcache or w3-total-cache and a memcached object cache backend.

    Batcache is what we use on WordPress.com.

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