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Performance problems using multisite on 3.0 (27 posts)

  1. mlamoure
    Posted 6 years ago #

    Hi all-

    I'm having strange performance problems on my MU install of 3.0. I've been testing for several weeks, and here is my findings:

    * When a new site is created, it runs fine performance wise. I'm convinced that this, plus other tests, indicates that the server itself is not the problem. My instance of MySQL is running on localhost to the server.
    * After some time, the site will begin to slow down, particularly on the admin side
    * This performance problem persists, despite using the TwentyTen theme and disabling all plugins. I paid particular attention to the domain mapping plugin, which I believed was the culprit, but turns out was not.
    * Apache logs look good. I had some problems with the sociable plugin, which I've determined is not 3.0 compatible. I've uninstalled it.
    * The root domain blog also suffers from the performance problems, even though it is the least configured than all the sub-sites. The root blog is running TwentyTen and has very few plugins, all of which I disabled at one time to debug.
    * Potentially related, but doubtful, the popular Maintenance mode plugin, when enabled, does not allow administrators to log into their site. I've reported this but did not get a response.

    If you have any thoughts please let me know. I'm anxious to get moving full speed with 3.0, and I'm glad to help with the testing efforts. I'm fairly capable with technical problems and troubleshooting, so it took me a while before coming to the point of asking for help!


  2. Are you pulling rss feeds across the sites? Or doing anything related to feeds?

  3. mlamoure
    Posted 6 years ago #

    Apologies for the delay. I'm using all default settings for the rss feeds. No plugins relating to RSS except PuSHPress.

  4. And what are you doing with pushpress? If you're using it to send feeds from one blog to another within the one install, that's the problem.

  5. PushPress is a PubSubHubbub plugin for WordPress that includes the hub. I use it on my site as network activated.

  6. mlamoure
    Posted 6 years ago #

    I've disabled EVERYTHING. Still extremely slow, particularly in the admin menus.

    Brand newly created blogs run very fast. Once they've been configured for a bit, they slow down. Using Twenty Ten. I'm debugging a bit more today. Obviously I updated to 3.0 RTM. Anyone else have ideas or experiencing this??

  7. Usually whenever I've seen this it's a plugin.

    Sometimes I've seen it happen when someone did something funky with feeds (which is why I asked first off). Like if a user puts the RSS widget in the sidebar and plunks their own feed in it? Yeah. Not fun.

    In some rare cases, I've seen it happen with either a memory leak between cpanel and CentOS, or a hardware failure. (That last one was a fun go aroudn with the webhost support.)

    Basically, for you, this means you'll have to sit on top of the server - preferably via ssh and top - and watch it as it slows to a crawl. If you have WHM you can also do it in there.

  8. davidajr
    Posted 6 years ago #

    Any look with trouble shooting?

    I've experienced the same problem. I knew I shouldn't have upgraded to 3.0, as I was happy with my theme (which wouldn't benefit from any of 3.0's new features) and you know, if it ain't broke, don't fix it.

    I decided to upgrade to 3.0 so that I can enable the multisite functionality and create a second blog for my wife, and then a third one for my cousin. Both of my secondary blogs run fine (http://shorthandlove.com and http://galleryd.net/landscaping) but my primary blog (http://galleryd.net) and my admin panel have slowed to a crawl. I've done all the basic TS steps, but to no avail.

  9. RankAhead
    Posted 5 years ago #

    Any solutions out there? I am having the same problem. 3-10 seconds to load a page in the backend. I have a single wordpress site running fine on same server. So I know its not the server or my computer.

  10. start with teh usual - turn off plugins, see if that fixes it.

  11. Jamie Marsland
    Posted 5 years ago #

    My multi-site has just reached over 50 blogs and has slowed to a crawl. It's unusable in the backend - taking a couple of minutes to load each page. Have de-activated all plugins and still the same problem?

  12. Jamie Marsland
    Posted 5 years ago #

    I should have added that front end pages are running fine.

  13. Are you on shared hosting or VPS?

    How much memory do you have?

    Have you turned on any caching plugins?

    (BTW, folks, when a topic is months old, it's usually best to make your own, since the pertinent information goes out of date pretty fast ;) )

  14. Jamie Marsland
    Posted 5 years ago #

    Shared hosting
    No caching plugins

  15. Try installing WP Super Cache then.

    That said, if you're at 50 blogs on Shared Hosting, you MAY need to take the next step to VPS or whatever elevated hosting your provider has. It depends on how much traffic they're getting, mind.

  16. Jamie Marsland
    Posted 5 years ago #

    Thanks, but I'm not getting any traffic - i use this site for training . Maybe 10 visitors per day :)

    Will try super cache i guess, but feels like it's something more fundamental.

  17. No traffic?

    Okay, did you set up any cross-site RSS pulls? Or are these really just 50 totally plain, nothin' goin' on sites?

  18. Jamie Marsland
    Posted 5 years ago #

    yep just totally plain, nothin goin on sites :(

    front end pages load super fast
    back end taking over 1 min to load

  19. If you're willing to test, make a new WP install, single site, and see if THAT has the same backend problem.

    Also check your memory usage on the server. It may have some hints.

  20. Jamie Marsland
    Posted 5 years ago #

    I have other wp installs running on the same shared server and they are running fine.

  21. Check the memory usage and your server error logs.

    The most likely error is that since WP MultiSite DOES need a bit higher resources, you've hit the limit for your server.

  22. Jamie Marsland
    Posted 5 years ago #


    I've increase the memory in php.ini , htaccess and wp-config and still running like a dog ( a dead dog).

    I get no memory errors in the log files - i've had these before on other sites with buddypress and increasing memory has fixed the issues...but not this :(

  23. What PHP type (suPHP or FastCGI) are you using, and what version?

  24. Jamie Marsland
    Posted 5 years ago #

  25. And have you disabled all your plugins?

  26. Server API - CGI

    Hrm. I wonder if that is FastCGI. Which does use more memory in weird ways.

  27. Jamie Marsland
    Posted 5 years ago #

    yes all plugins deleted, all themes deleted apart from 2010.

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