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WP-FFPC
[resolved] Extremely slow /wp-admin (12 posts)

  1. guiribeiro
    Member
    Posted 10 months ago #

    Starting yesterday, the dashboard (wp-admin) of all my websites became extremely slow, taking about 2min to load. Deactivating WP-FFPC brings everything back to normal.

    I'm running Centmin Mod v1.2.3 on a 512MB DigitalOcean's Droplet, with this configuration of WP-FFPC and Nginx.

    I've tried many different settings for the vhost's without any effect. The only fix was deactivating the cache system :(

    I really need help with this!
    Thanks

    http://wordpress.org/plugins/wp-ffpc/

  2. Christiaan Conover
    Member
    Posted 10 months ago #

    Did you get any HTTP errors?

  3. petermolnar
    Member
    Plugin Author

    Posted 10 months ago #

    I'm not sure you'll get any good results with DigitalOcean, I had my system terribly slow, no matter what I did on their droplets, and no idea why. Although for me it was slow with or without cache :)

    If anyone has any idea what might be causing this especially on digitalocean ( it does not affects, for example, cheapvps.co.uk machines ), please write it down here.

  4. Christiaan Conover
    Member
    Posted 10 months ago #

    I'm on DigitalOcean and my sites are faster than they've been on any other host. The only time I've run into an issue is earlier this week when WP-FFPC suddenly started causing issues with my /wp-admin and throwing 504 errors.

  5. petermolnar
    Member
    Plugin Author

    Posted 10 months ago #

    I've tested the plugin on different version of WordPress, something has changed in 3.6 I was unaware of.

    I'll try to eliminate all notice/warning messages PHP is giving and see if it solves it.

  6. Christiaan Conover
    Member
    Posted 10 months ago #

    Ok sounds good, I'll be happy to test it for you.

  7. guiribeiro
    Member
    Posted 10 months ago #

    I've created a new Droplet and moved all sites. The problem is gone and websites are faster than ever. Everything is using sockets, I'm wondeirng if WP-FFPC would work if I use Memcached on Unix Socks?

  8. petermolnar
    Member
    Plugin Author

    Posted 9 months ago #

    Unfortunately there are issues with connecting to socket based memcached, although you would not really get any more speed if it's on the same machine.

    I still believe there's something wrong with the plugin vs wp-admin but I did not have time to look into it yet.

  9. petermolnar
    Member
    Plugin Author

    Posted 8 months ago #

    After the last few updates of WordPress any traces of the slowdown issue is gone for me.
    Is there any updates from your side, @guiribeiro ?

  10. Christiaan Conover
    Member
    Posted 8 months ago #

    I also moved to a new Droplet and everything is working fine. However, I did encounter an issue about three weeks after I moved that I traced to ramlog running out of RAM. I disabled ramlog and haven't had a single issue since.

  11. guiribeiro
    Member
    Posted 8 months ago #

    Hey Peter, thanks for your interest! To be honest, I could not be more happy, your plugin is working perfectly and is saving tons of server resources.

    I believe to have found the cause of the issue (at least for me). When I first started with WP performance optimisation, I was using Ubuntu servers with Varnish and Ryan's Memcached Object Cache plugin. Then I moved to CentOS and started experimenting with some alternatives but forgot to remove the object-cache.php file from the wp-content folder of my websites. When I moved the sites to new servers, I did it using a shell script which got rid of all remaining object-cache.php files. Since then, I had not a single issue and performance is far superior than it was before.

    I don't use Varnish for WordPress sites anymore, but is worth to mention that beyond the NGINX / Memcached cache system, I also have CloudFlare Pro in front of all my websites which guarantees that all my assets are cached in a load balanced CDN.

    I'm still looking to have Memcached listen on a socket instead of a TCP port. In fact, this is quite simple to achieve, however, the plugin don't work with this configuration and I could invest the time to investigate the reason deeply enough. Some days ago, however, a member have succeed in making Ryan's Memcached Object Cache plugin work with a Memcached instance listening on sockets, if you can have a look, it would be awesome.

    http://wordpress.org/support/topic/memcached-with-unix-socket

    Again, thanks a lot for making my websites super-fast!
    Cheers :)

  12. petermolnar
    Member
    Plugin Author

    Posted 7 months ago #

    Problems solved, just cleaning up & closing topic :)

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