Autoptimize is causing thentire html cache to be cleared when a post is updated

*something* (a plugin or your theme? is it Divi by any chance?) must be triggering AO’s cache to be cleared schoolreadinglist .. :-/

We don’t use DIVI.

Literally changing one word on a post and updating is causing the entire HTML cache to be cleared.

When Autoptimize is deactivated the problem goes away.

Please can you help?

To be clear, it is not AO’s cache that is being cleared, it is cache generated by WP Fastest cache – ie every chached html page. AO is causing this.

Do you have a code snippet to turn this off?

Check line 413 autoptimize/classes/autoptimizeCache.php

add_action( 'autoptimize_action_cachepurged', array( 'autoptimizeCache', 'flushPageCache' ), 10, 0 );

and lines 778-780 :autoptimize/classes/autoptimizeCache.php

       } elseif ( class_exists( 'WpFastestCache' ) ) {
            $wpfc = new WpFastestCache();
            $wpfc->deleteCache();

You will see that Autoptimize is causing the entire WP Fastest Cache’s cache to be cleared when a post is updated. In the WP Fastest Cache log this is indicated: 26-05-2021 @ 14:01:32 flushPageCache

Please advise on a fix. We don’t want a 3000 page website’s entire cache to be cleared when one word is changed! We have built our site arount Autoptimize and would hate to have to redevelop it with another optimisation plugin. Thanks for your time.

• This reply was modified 3 years, 9 months ago by School Reading List.

* AO only asks page cache’s to clear their cache if AO’s cache was cleared, for the simple reason that otherwise you would have pages in cache that refer to Autoptimized files that were removed, resulting in badly broken pages which we do not want (so no, there is no code snippet).
* AO never clears it’s own cache, so something (theme/ plugin) is doing this

the only good solution is finding out what (theme? a plugin) is clearing AO’s cache upon page/ post publication, as that is the root of all problems here.

Sorry, but you have not understood the issue.

Nothing is “clearing AO’s cache”

AO

is clearing WP Fastest Cache’s cache.

We need to prevent AO from clearing the cache.

I hope you understand the issue. WP Fastest Cache’s chache is being cleared – uncommanded – by your plugin.

Please read our previous post which explains this, identifies the code in your plugin responsible and provides log file proof.

Thanks.

I’d also like to add that you will be able to replicate the issue with a clean install of WP 5.7, and just the WP Fastest Cache and Autoptimize plugins installed and active.

AO *never* acts on page caches unless it’s own cache is cleared (https://github.com/futtta/autoptimize/blob/beta/classes/autoptimizeCache.php#L405-L414 is part of the autoptimizeCache’s clearall method, which is what is called to clear AO’s cache)

nothing in AO’s codebase acts on page/ post publication schoolreadinglist.

Believe, I have a pretty good idea how AO works ??

Sorry, but it is your plugin causing the issue.

As I explained earlier, we’ve replicated with a fresh install, default theme, and just WP Fastest Cache and Autoptimize installed.

When Autoptimize is deactivated, the issue is resolved.

There is no doubt, I’m afraid, and I’m really sorry you don’t seem to want to pursue this.

Thanks for your time.

• This reply was modified 3 years, 9 months ago by School Reading List.

A further proof of the bug:

If you comment out these lines in the autoptimize cache php file:

// Cache was just purged, clear page cache and allow others to hook into our purging...
        if ( true === $propagate ) {
            if ( ! function_exists( 'autoptimize_do_cachepurged_action' ) ) {
                function autoptimize_do_cachepurged_action() {
                    do_action( 'autoptimize_action_cachepurged' );
                }
            }
            add_action( 'shutdown', 'autoptimize_do_cachepurged_action', 11 );
            add_action( 'autoptimize_action_cachepurged', array( 'autoptimizeCache', 'flushPageCache' ), 10, 0 );
        }

The issue resolves. .

Crucially, if you then manually purge the autoptimize cache from the admin bar, the WP Fastest Cache DOES NOT clear (if the above code is commented out). This proves that it is not a third party calling Autoptimize to clear AO’s cache thereby clearing WP Fastest Cache’s cache, as you suggested. It is in fact AO clearing WP Fastest Cache’s cache whenever the slightest change is made.

To stress how important this is – if a user has autoptimize installed with this bug, and uses a CDN, Cloudflare, or Cloudfront etc with paid per request pricing, then Autoptimize clearing an entire site’s cache uncommanded will cause a collosal cost increase in CDN bills as the entire site preloads/reloads.

I mean, you obviously can read code as you are copy/pasting it yourself, no? So in that case look just a bit higher up and you cannot but see that the code you’re mentioning is part of AO’s clear cache functionality (it’s even in the comment you pasted; // Cache was just purged), no? This code does not, ever, get triggered but in an AO clear cache scenario and AO _never_ clears it’s own cache and when AO’s cache gets cleared, the page cache _has_ to be purged as well.

So I cannot but re-iterate; something is clearing AO’s cache and you will need to find out what that *something* is or indeed use a different optimization plugin, which you obviously are entirely free to do.

That, I’m afraid, is all I can do for you.

frank

Ok. We can see that you either don’t or don’t want to understand the issue. We’ll use another plugin. This thread can be closed.