cache is empied every hour or less

mau.rec
(@maurec)

10 years, 5 months ago

I’m running wp super cache on wp multisite on high traffic network.
Wp super cache is configured as in the following link: http://www.rackspace.com/knowledge_center/article/using-wp-supercache-to-optimize-wordpress-on-cloud-sites

So no expire for files in cache. But cache is emptied often, in less than an hour. This happen when multiservers are using the same NFS , and also when I switch on local server cache.

http://wordpress.org/plugins/wp-super-cache/

Viewing 4 replies - 1 through 4 (of 4 total)

Thread Starter

(@maurec)

I explain more details: WordPress in running on 4 frontend working on the same doc root shared by NFS. When started wp super cache had 3600seconds as $cache_max_time. After changing to 0 (no expire) still I see deleted file in cache after one hour. Any idea? Is there someone who knows the reason?

Thread Starter

mau.rec

(@maurec)

10 years, 5 months ago

Hi, maybe there is a bug on wp super cache (1.3 and 1.4 too) when installed on multisite network. When a user change theme or there is a menu refresh all dir supercache is emptied. Initially I thought to a problem on expire time.

I’ve found a soluzion, in file wp-cache-phase2.php add the new line:

function wp_cache_clear_cache( $blog_id = 0 ) {
//NEW LINE
$blog_id = get_current_blog_id();
…
}

It was like if a normal administrator use blog_id=0 that is only for super administrator.
I hope this will be fixed in wp super cache next release.

Plugin Author

Donncha O Caoimh (a11n)

(@donncha)

10 years, 4 months ago

There are two calls to wp_cache_clear_cache() in wp-cache.php which might have caused this problem so I added get_current_blog_id() there instead. I don’t want to change the behaviour of that function as others probably use it and depend on how it works.

Setting the timeout only disables garbage collection, not when actions take place that update content. If you could take a look at the debug log or copy to pastebin.com the portion of it when the cache is cleared that would be really useful. Just remove paths please as you don’t want people knowing where on your server files live!

Thread Starter

mau.rec

(@maurec)

10 years, 4 months ago

TEST CASE: Changing theme on one site of the network the supercache dir has been emptied completely,not only for that site.
NOTE: $cache_max_time = 0; (Never expire)

WP SUPER CACHE 1.3 SETTINGS
===========================

$wp_super_cache_comments = '1'; //Added by WP-Cache Manager
$wp_cache_preload_on = 1; //Added by WP-Cache Manager
$wp_cache_preload_taxonomies = 0; //Added by WP-Cache Manager
$wp_cache_preload_email_volume = 'less'; //Added by WP-Cache Manager
$wp_cache_preload_email_me = 0; //Added by WP-Cache Manager
$wp_cache_preload_interval = 0; //Added by WP-Cache Manager
$wp_cache_preload_posts = '34'; //Added by WP-Cache Manager
$cache_schedule_interval = 'daily'; //Added by WP-Cache Manager
$cache_gc_email_me = 0; //Added by WP-Cache Manager
$cache_scheduled_time = '00:00'; //Added by WP-Cache Manager
$wp_cache_mobile_groups = ''; //Added by WP-Cache Manager
$wp_cache_mobile_prefixes = 'w3c , w3c-, acs-, alav, alca, amoi, audi, avan, benq, bird, blac, blaz, brew, cell, cldc, cmd-, dang, doco, eric, hipt, htc_, inno, ipaq, ipod, jigs, kddi, keji, leno, lg-c, lg-d, lg-g, lge-, lg/u, maui, maxo, midp, mits, mmef, mobi, mot-, moto, mwbp, nec-, newt, noki, palm, pana, pant, phil, play, port, prox, qwap, sage, sams, sany, sch-, sec-, send, seri, sgh-, shar, sie-, siem, smal, smar, sony, sph-, symb, t-mo, teli, tim-, tosh, tsm-, upg1, upsi, vk-v, voda, wap-, wapa, wapi, wapp, wapr, webc, winw, winw, xda , xda-'; //Added by WP-Cache Manager
$wp_cache_refresh_single_only = '0'; //Added by WP-Cache Manager
$wp_cache_make_known_anon = 0; //Added by WP-Cache Manager
$wp_cache_mod_rewrite = 1; //Added by WP-Cache Manager
$wp_cache_front_page_checks = 0; //Added by WP-Cache Manager
$wp_cache_mfunc_enabled = 0; //Added by WP-Cache Manager
$wp_supercache_304 = 0; //Added by WP-Cache Manager
$wp_cache_no_cache_for_get = 0; //Added by WP-Cache Manager
$wp_cache_disable_utf8 = 0; //Added by WP-Cache Manager
$cache_time_interval = '3600'; //Added by WP-Cache Manager
$cache_schedule_type = 'time'; //Added by WP-Cache Manager
$cache_page_secret = 'd7f52b7db4577105ff64d1ddde55cd0e'; //Added by WP-Cache Manager
$wp_cache_slash_check = 1; //Added by WP-Cache Manager
if ( ! defined('WPCACHEHOME') )
        define( 'WPCACHEHOME', WP_CONTENT_DIR . "/plugins/wp-super-cache/" ); //Added by WP-Cache Manager

$cache_compression = 0; // Super cache compression
$cache_enabled = true; //Added by WP-Cache Manager
$super_cache_enabled = true; //Added by WP-Cache Manager

$cache_max_time = 0; //Added by WP-Cache Manager
//$use_flock = true; // Set it true or false if you know what to use
$cache_path = WP_CONTENT_DIR . '/cache/';
$file_prefix = 'wp-cache-';
$ossdlcdn = 0;

WP SUPER CACHE 1.3 CACHE BEFORE CHANGING ONE SITE THEME (ADMNISTRATOR ROLE FOR HIS SITE:blogsite.blog-dev.domain.net)
=======================================================================================

-bash-4.1$ pwd
/doc_root/wp-content/cache/supercache

-bash-4.1$ ls -lrt
total 32

drwxr-xr-x 2 httpd www 4096 Dec  2 10:27 blogsite.blog-dev.domain.net
drwxr-xr-x 2 httpd www 4096 Dec  2 10:28 blogsite2.blog-dev.domain.net
drwxr-xr-x 3 httpd www 4096 Dec  2 10:30 blogsite3.blog-dev.domain.net

WP SUPER CACHE 1.3 CACHE LOG
==================================================

09:37:13 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e wp_cache_get_cookies_values: /^wp-postpass|^comment_author_|^wordpress_logged_in_/ Cookie detected: wordpress_logged_in_254caaa56aa85fe62dac54f14572346a
09:37:13 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e wp_cache_check_mobile:
09:37:13 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e supercache dir: /docroot/wp-content/cache/supercache/blogsite.blog-dev.domain.net/wp-admin/themes.php/
09:37:13 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e No wp-cache file exists. Must generate a new one.
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e wp_cache_get_cookies_values: /^wp-postpass|^comment_author_|^wordpress_logged_in_254caaa56aa85fe62dac54f14572346a/ Cookie detected: wordpress_logged_in_254caaa56aa85fe62dac54f14572346a
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e In WP Cache Phase 2
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e Setting up WordPress actions
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e Not caching wp-admin requests.
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e Clearing all cached files in wp_cache_clear_cache()
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e prune_super_cache: deleted /docroot/wp-content/cache/supercache/blogsite.blog-dev.domain.net/index.html
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e gc: deleted /docroot/wp-content/cache/supercache/blogsite.blog-dev.domain.net, forced delete
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e prune_super_cache: deleted /docroot/wp-content/cache/supercache/blogsite2.blog-dev.domain.net/index.html
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e gc: deleted /docroot/wp-content/cache/supercache/blogsite2.blog-dev.domain.net, forced delete
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e prune_super_cache: deleted /docroot/wp-content/cache/supercache/blogsite3.blog-dev.domain.net/sitemap_index.xml/index.html
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e gc: deleted /docroot/wp-content/cache/supercache/blogsite3.blog-dev.domain.net/sitemap_index.xml, forced delete
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e prune_super_cache: deleted /docroot/wp-content/cache/supercache/blogsite3.blog-dev.domain.net/index.html
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e gc: deleted /docroot/wp-content/cache/supercache/blogsite3.blog-dev.domain.net, forced delete
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e gc: deleted /docroot/wp-content/cache/blogs/blog-dev.domain.net/meta, forced delete
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e gc: deleted /docroot/wp-content/cache/blogs/blog-dev.domain.net, forced delete
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e prune_super_cache: deleted /docroot/wp-content/cache/blogs/blogsite.blog-dev.domain.net/wp-cache-blogsite.blog-dev.domain.net215f4aab7a4f800526f5332391cfea26.html
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e prune_super_cache: deleted /docroot/wp-content/cache/blogs/blogsite.blog-dev.domain.net/meta/wp-cache-blogsite.blog-dev.domain.net215f4aab7a4f800526f5332391cfea26.meta
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e gc: deleted /docroot/wp-content/cache/blogs/blogsite.blog-dev.domain.net/meta, forced delete
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e gc: deleted /docroot/wp-content/cache/blogs/blogsite.blog-dev.domain.net, forced delete
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e gc: deleted /docroot/wp-content/cache/blogs, forced delete
09:37:14 /wp-admin/themes.php?action=activate&template=twentyten&stylesheet=twentyten&_wpnonce=cbacf89a3e prune_super_cache: deleted /docroot/wp-content/cache/9a71b2c3c74d5a7ebeda3396a8b6100f.txt

WP SUPER CACHE 1.3 CACHE AFTER CHANGING ONE SITE THEME
================================================================

-bash-4.1$ pwd
/docroot/wp-content/cache/supercache

-bash-4.1$ ls -l
total 0

Viewing 4 replies - 1 through 4 (of 4 total)

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