"Current Wasted" % always grows when object cache is enabled

[fidoboy]

I've noticed that the percentage is growing slowly but can't understand why. It doesn't happens when the object cache is disabled. I've tried disabling preloading menus, translations, etc. but can't get it working as expected.

What alse can I try?

[nawawi]

Hi there,

"Current Wasted" is related to OPcache. When enabling Object Cache, cached files in "wp-content/cache/docket-cache" will be cached by OPcache. It is more of a server-level OPcache setting. You need to fine-tune the OPcache settings.

Thanks.

[fidoboy]

Hi there,

"Current Wasted" is related to OPcache. When enabling Object Cache, cached files in "wp-content/cache/docket-cache" will be cached by OPcache. It is more of a server-level OPcache setting. You need to fine-tune the OPcache settings.

Thanks.

I know about that, but issue is that it only grows when Docket Cache is enabled. It doesn't happen if it's not. So it's an issue related with the object cache. May be you could know about where to start to search. Also I'm not sure if it's the regular behavior of the plugin or it's not.

[nawawi]

only grows when Docket Cache is enabled. It doesn't happen if it's not. So it's an issue related with the object cache

Docket Cache writes its cache as a PHP file. When OPcache is enabled on your site, the cache files will be cached by OPcache to store them in memory. Therefore, there is no need to read the cache file because it is already in memory. This behaviour will improve the cache performance.

If OPcache is not enabled on your site, Docket Cache object caching still works, but the performance is not as good as when has OPcache.

May be you could know about where to start to search. Also I'm not sure if it's the regular behavior of the plugin or it's not.

Docket Cache only uses OPcache to improve the cache performance. It can't control OPcache behaviour or settings, as that must be done at the server level.

You may exclude Docket Cache cache files from being cached by OPcache using this opcache.blacklist_filename directive:

opcache.blacklist_filename=/your-wordpres-root-path/wp-content/cache/docket-cache/*-*.php

Please refer to the link below to understand better:

• https://sergey-lysenko.com/opcache-wasted-memory/
• https://tideways.com/profiler/blog/fine-tune-your-opcache-configuration-to-avoid-caching-suprises

Thanks.