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Multisite slowdown

My Multisite install is suddenly running incredibly slowly. Using the P3 – Performance Profiler, this suggests that the two main culprits are the ‘WPMU DEV Dashboard’ plugin (taking 17% of my load time) and the Domain Mapping plugin (a further 11%).

Things never used to be this bad, can you help me?

Wed, 2 Jan 2013 13:51:21
More WPMU DEV Dashboard discussions
WPMU DEV Dashboard
  • Kimberly
    • Champion of Loops

    hey Stephen,

    sorry you’re having trouble :slight_frown:

    Would you be able to deactivate both of the plugins and then try to see if it makes a difference?

    Sometimes it’s the memory allocation that causes a problem, not so much the plugin, but it’d be better if we make sure it’s not the plugin first off :slight_smile:

    Kimberly

  • Aaron
    • Ex Staff

    If they are running that slow then something is not right with your server. Lets focus on Dashboard first.

    Does this slowness and 17% occur only for superadmins? Essentially there are 3 processes in Dashboard that have a pontential of running slowly, so they are cached for varying amounts of time, as well as only running when it’s a super admin account visit. It would help to know from the profiler what processes/functions are causing your slowness.

  • stephenb
    • Flash Drive

    Here’s the profiler output:

    WordPress Plugin Profile Report

    ===========================================

    Report date: January 5, 2013

    Theme name: Swift

    Pages browsed: 22

    Avg. load time: 2.6617 sec

    Number of plugins: 30

    Plugin impact: 63.60% of load time

    Avg. plugin time: 1.6930 sec

    Avg. core time: 0.4147 sec

    Avg. theme time: 0.4167 sec

    Avg. mem usage: 39.03 MB

    Avg. ticks: 8,926

    Avg. db queries : 133.59

    Margin of error : 0.1373 sec

    Plugin list:

    ===========================================

    P3 (Plugin Performance Profiler) – 0.0292 sec – 1.73%

    Admin Message – 0.0069 sec – 0.41%

    Adminimize – 0.0341 sec – 2.01%

    Avatars For Multisite – 0.0221 sec – 1.31%

    New Blog Templates – 0.0281 sec – 1.66%

    Comment Spam Pack – 0.0811 sec – 4.79%

    Custom Content Dashboard Widget – 0.0057 sec – 0.33%

    Dashboard Widgets Order – 0.0008 sec – 0.05%

    Domain Mapping plugin – 0.4526 sec – 26.73%

    Google Analytics – 0.0473 sec – 2.79%

    Gravity Forms – 0.0791 sec – 4.67%

    Hide Welcome Panel for Multisite – 0.0485 sec – 2.87%

    Jetpack by WordPress.com – 0.3554 sec – 20.99%

    Jsdelivr WordPress Cdn Plugin – 0.0062 sec – 0.37%

    Manual Control for Jetpack – 0.0049 sec – 0.29%

    Multisite Plugin Manager – 0.0087 sec – 0.51%

    Password Pointer – 0.0022 sec – 0.13%

    TinyMCE Advanced – 0.0019 sec – 0.11%

    Tm Replace Howdy – 0.0014 sec – 0.08%

    Ultimate Branding – 0.0936 sec – 5.53%

    Wp Mail Smtp – 0.0029 sec – 0.17%

    Infinite SEO – 0.1277 sec – 7.54%

    Wpmudev Updates – 0.1040 sec – 6.14%

    WPMU DEV Videos – 0.0168 sec – 0.99%

    Bits On The Run – 0.0027 sec – 0.16%

    Cookie Control – 0.0059 sec – 0.35%

    Follow Button For Jetpack – 0.0132 sec – 0.78%

    Gravityformspaypal – 0.0148 sec – 0.88%

    Q2W3 Post Order – 0.0848 sec – 5.01%

    E: – 0.0103 sec – 0.61%

    On this occasion the Updates plugin was not as bad, but the Domain Name mapping plugin more than made up for that!!

    You’ll see Jetpack is also fairly disastrous, nothing to do with WPMU, but maybe that also offers some clues?

    If I look at the site from a non-logged in browser, it still take an age for the first page to appear suggesting something is still causing a huge lag for non-logged in users.

  • Aaron
    • Ex Staff

    It’s really hard to tell from this what your slowness problem is. It really doesn’t seem to be tied very much to specific plugins though.

    I’m sure you could substantially speed things up with some optomizations. Installing a php accelerator on your server would lower those times substantially probably. The major cause of slowness is usually the DB. If your db server is slow then that will drive every script down.

    Then you have all the frontend optimizations, which is where 80-90% of slowness comes from. A tool like Google page speed will help you work through that.