3.8 extremely slow

  • Ever since the upgrade to 3.8 my site has been running extremely slowly.
    Some pages take upwards of 20 seconds to load with some hitting the 50 second mark. Prior to 3.8 pages were loading in 5 seconds max.

    I added caching so the cached pages load at a reasonable speed however uncached pages are just unusable and I am losing ranking and visitors due to this.

    before going through a risky downgrade I wanted to see if anyone had any thoughts.

    What i have tried
    – Disabled all plugins
    – Changed theme to default theme
    – reset the plugins folder
    – added caching
    – disabled gravatars

    I cant for the life of me figure out what may be causing the slow down here. Any help would be appreciated. I can provide any log needed, this is a VDS so I have full access to provide what may be needed.

    Last option will be downgrading back to 2.71

    URL is https://www.silvertails.net (front page will load quickly because of caching so you will need to click through to direct articles/posts to see how slow it gets)

    Dan

Viewing 6 replies - 31 through 36 (of 36 total)
  • Thread Starter dannymh

    (@dannymh)

    Also mysql query cache is enabled

    I didnt viewed the source code before, but I see a lot of debug info from W3TC. You can deactivate that and stop sending fat pages. Also, try deactivating memcached for a while and use disk:enhanced instead. And use mysql cache, via the mysql server and via W3TC.
    Minify is known to be buggy in the current version of W3TC, so you will want to deactivate it.

    Thread Starter dannymh

    (@dannymh)

    Ok after a little more time looking at this and a clearer head I was able to determine where a lot of the speed issues were coming from.

    The database where the advertising was kept was locking and causing slow queries. I now sync the data for the advertising in the background between the systems as to not have to make an external database call and free up time, as really the advertising storage database can be a storage engine only and only hits and clicks change with any regularity so a daily sync and null works for this.

    Additionally there were a number of internal http: requests that were going on which were leading to speed issues, these requests were doing various things like loading HTML files via readfile or file_get_contents which is part of the forum integration, I changed this to a relative path and it cut the load time of those down significantly, saving my 5 seconds per load.

    Once I rebooted the server to clear the locks on the database and start fresh, I changed the w3 total cache to use disk enhanced as suggested and now I am getting much faster load times averaging around 4 seconds with the majority of that being the core of wordpress and only 3% being plugins according to the p3 plugin profiler.

    I am going to look at making the paths to the styles and the javascripts relative also which hopefully will shave a few more fractions of second off the load as we wont be running http requests to get them.

    Cheers
    Dan

    Glad to hear.

    Anyway, I see the site slow loading yet.
    Have you tried loading objects to Amazon Cloudfront and/or using Cloudflare for double CDN purposes?
    I recommend not to use the Cloudflare support from W3TC, but the official Cloudflare plugin instead.
    Cloudfront is perfectly ok via W3TC.

    Thread Starter dannymh

    (@dannymh)

    Hmm loading fine for me now on all devices and different connections, odd it’s slow for you

    Discard my point of view. I checked again and see your hosting is almost in my antipodes ?? I’m in South America and ping is almost 400 ms. If connections from your country and real target are quick enough, consider it a good job done ??

Viewing 6 replies - 31 through 36 (of 36 total)
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