Support » Plugins » [Plugin: WP Super Cache] Blank Pages – 500 Errror – in Dashboard (sometimes the site too)

  • With WP Super Cache Enabled, every few hours I get the php 500 error (or w/e it’s called) throughout my entire wordpress installation – the site, the admin, everything. And the only way to bring it back is to reboot Apache.

    Someone had a problem similar to this, and got it resolved for themselves. Well for me, the issue isn’t resolved. I still get 500 errors several times throughout the day when I’m using the wp super cache plugin. I’m on WordPress 2.6, and I got the same problems with 2.5 and 2.5.1. The plugins I have running are:

    Audio Player
    Different Posts per Page
    Feedburner Feed Replacement (dashboard only plugin)
    Force Word Wrapping
    Kimili Flash Embed
    No Howdy (wp-admin only plugin)
    No Self Pings
    Optimal Title
    Page Post
    Post Avatar
    Role Manager
    SEO Post Link
    Simple Tags
    Theme Test Drive
    Wordpress Video Plugin

    The site works fine, other than it loading slowly, when I disable the plugin. Someone mentioned mod rewrite rules or something like that. Can this be fixed? I would really love to utilize this great program! But I can’t have my site going down every few hours. I’d rather it just load a little slower…

Viewing 14 replies - 1 through 14 (of 14 total)
  • Bump … anyone?

    Have you checked your php error_log? Have you tried disabling some of those plugins? Perhaps your server doesn’t have the capacity to run all of them plus the caching plugin. Unfortunately gzipping content like the caching plugin does takes up a lot of memory.

    Yeah, I think another plugin might be causing the issue, in addition to wp cache. I still get 500 errors with it disabled (but not as much – maybe once a day, or every couple of days). The only difference is that when wp cache causes 500 errors, the entire site is down. When I have it off, and I still get 500 errors, only the top portion of the dashboard shows up.

    Donncha, what should I look for in my php error_log? This can be found in /etc/httpd/logs right?

    I got the same problems but also with all plugins (ecxept askimet) disabled!



    So maybe akismet is the problem lol. The one plugin no one disables or is afraid to disable.

    I don’t know what to look for, except if there are errors in there it might be better to fix them, because they might be causing this problem.

    You could also define WP_MEMORY_LIMIT to a large memory size, maybe even “64M” like this. Add this line to wp-config.php before the last require_once()

    define(‘WP_MEMORY_LIMIT’, ’64M’);



    And what would that do?



    define('WP_MEMORY_LIMIT', '64M');

    This command will increase PHP memory to 64M.

    I got the same ‘500 Internal Server Error’

    /var/www/blog/wp-content/cache/.htaccess: ExpiresActive not allowed here

    After I delete cache,then I can view the site once.

    My website for example is : http: //

    refer to Troubleshooting:
    10.If pages are randomly super cached and sometimes not, your blog can probably be viewed with and without the “www” prefix on the URL. You should choose one way and install the Enforce www preference(

    But it still can’t work.Could someone help me.thx

    doncot – edit that .htaccess and remove the “ExpiresActive” line, or fix your Apache config so it’s supported. (It’s late here, can’t check, but look in the .htaccess and you’ll see the module)

    Add a rewrite rule to your .htaccess to enforce whichever www preference you prefer.

    Thanks donncha,

    I edited wp-content/cache/.htaccess and removed following lines:
    <IfModule mod_expires.c>
    ExpiresActive On
    ExpiresByType text/html A300

    or fix my Apache config file like below:
    <Directory “/var/www/blog”>
    Options FollowSymLinks
    AllowOverride FileInfo AuthConfig –> AllowOverride All
    Order allow,deny
    Allow from all

    Now It is ok.
    But I have not got idea how to rewrite my .htaccess.(do you mean /.htaccess or wp-content/cache/.htaccess ?)
    And how to fix my Apache config file?

    Anyway,Thank you so much. 🙂

    “But I have not got idea how to rewrite…”

    What do you mean? You just did rewrite the .htaccess and fixed the Apache config ..

    What is the Apache config fix, specifically? In other words, what lines would I add to or edit in Apache config? Or is it RTFM? If so, which M? What topic in the M?

    I installed wp-super-cache last night and woke up to find a dead site (the admin worked though), with this in the logs:

    [Sat Oct 18 01:45:35 2008] [alert] [client] /usr/local/www/data/pathtomysite/wp/wp-content/cache/.htaccess: ExpiresActive not allowed here

Viewing 14 replies - 1 through 14 (of 14 total)
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