Alwin

I think I already did something like that: I went to the files on my webserver and went to he cache folder >> file-based-page-cache-functions.php there.

I deleted the line: if (defined(‘DOING_CRON’) && DOING_CRON) return;

It did not help.

Thank you for your help.

But where can I find this line:
cache/file-based-page-cache-functions.php

And do I have to remove it?

I have since received an answer from NewRelic support: at the time NewRelic started to monitor the uncached pages, they switched to Google DNS Server and Cloudflare, instead of relying on System DNS Configuration.

So in summary, the following happened:

• NewRelic switched to Google DNS and Cloudflare
• From that moment NewRelic stopped monitoring the cached pages, and monitored the not cached pages.
• With an older version of WPO 3.8.0 NewRelic is still monitoring the cached pages, even though NewRelic now uses Google DNS and Cloudflare.

So as of WPO version 4.0.0, something has changed in the WPO plugin, which prevents NewRelic from monitoring the cached pages.

Also, another cache plugin (Litespeed Cache) I have installed on antoher website, shows no difference in NewRelic before and after switching to Google DNS.

So must be something in WPO, starting from version 4.0.0

These newrelic graphs are for http://www.greenconnections.nl:

This graph shows the increase in response time immediately after updating WPO to version 4.0.0 at 11 February:

View post on imgur.com

Today I uninstalled WPO completely from this site at 10:30 and reinstalled at 11:00. As you can see nothing changend in NewRelic in this time period:

View post on imgur.com

However, it seems to be a NewRelic specific issue because I use antoher uptime monitor service called BetterStack and that one does show the period when WPO was uninstalled today:

View post on imgur.com

So cache is working fine on all my 10 websites. But from the exact moment I upgraded WPO to version 4.0.0 NewRelic does not monitor the cached pages anymore, and can’t see the keyword “Cached by WP-Optimize” in the source code either. Other uptime monitoring service does not have this issue.

Strange, isn’t it 🙂

• This reply was modified 1 year, 3 months ago by Alwin.

Hello Daan, I do think it is a little bit strange that you are not aware of this, cause you are the plugin builder, right…

Anyway, this is the code that CAOS plugin inserted on my website:

<script>
    window.minimalAnalytics = {
        trackingId: 'G-XXXXXXXXX',
        autoTrack: true,            defineGlobal: true
    }
</script>

<script>
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n&&(t=""+(+n+1)),sessionStorage.setItem(e,t),t}()),{firstVisit:t,sessionStart:n,sessionCount:o}}function p(e){return Array.isArray(e)?e.map((e=>e.map((e=>null==e?void 0:e.toString())))):Object.keys(e).map((t=>[t,${e[t]}]))}},209:(e,t)=>{Object.defineProperty(t,"M",{value:!0}),t.files=t.k=void 0;t.k={protocolVersion:"v",trackingId:"tid",pageId:"_p",language:"ul",clientId:"cid",firstVisit:"_fv",hitCount:"_s",sessionId:"sid",sessionCount:"sct",sessionEngagement:"seg",sessionStart:"_ss",debug:"_dbg",referrer:"dr",location:"dl",title:"dt",eventName:"en",eventParam:"ep",eventParamNumber:"epn",screenResolution:"sr",enagementTime:"_et"};t.files=["pdf|xlsx?|docx?|txt|rtf|csv|exe|key|pp(s|t|tx)|7z|pkg|rar|gz|zip|avi","mov|mp4|mpe?g|wmv|midi?|mp3|wav|wma"]}},t={};function n(o){var i=t[o];if(void 0!==i)return i.exports;var s=t[o]={exports:{}};return e[o](s,s.exports,n),s.exports}n.d=(e,t)=>{for(var o in t)n.D(t,o)&&!n.D(e,o)&&Object.defineProperty(e,o,{O:!0,get:t[o]})},n.D=(e,t)=>Object.prototype.hasOwnProperty.call(e,t),n.r=e=>{"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"M",{value:!0})};var o={};return(()=>{var e=o;Object.defineProperty(e,"M",{value:!0}),e.track=void 0;const t=n(508),i=n(209),s="undefined"!=typeof window,r=s&&window.minimalAnalytics?.defineGlobal,a=s&&window.minimalAnalytics?.autoTrack,c=["q","s","search","query","keyword"];let u,l,d,f=[[Date.now()]],m=!1;const g="page_view",v="scroll",p="click",w="view_search_results",h="user_engagement",y="file_download";function b(e,{type:n,event:o,debug:s}){const{location:r,referrer:a,title:u}=(0,t.m)(),{firstVisit:l,sessionStart:d,sessionCount:f}=(0,t.$)(!m),g=self.screen||{};let 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0,c=o?.getAttribute("download")||void 0||a,{t:u,hostname:l,pathname:d}=(0,t.S)(c),f="link"===r&&!u,[m]=c?.match(new RegExp(i.files.join("|"),"g"))||[],g=m?y:p,v=${i.k.eventParam}.${r};if(!o||f&&!m)return;let w=[[${v}_id,o.id],[${v}_classes,o.className],[${v}_name,o?.getAttribute("name")?.trim()],[${v}_text,o.textContent?.trim()],[${v}_value,o?.getAttribute("value")?.trim()],[${v}_url,a],[${v}_domain,l],[${i.k.eventParam}.outbound,${u}],[i.k.enagementTime,_()]];m&&(w=w.concat([[${i.k.eventParam}.file_name,d||c],[${i.k.eventParam}.file_extension,m]])),D(e,{type:g,event:w})}function S(){const e=f.length-1,[,t]=f[e];t||f[e].push(Date.now())}function x(){const e=f.length-1,[,t]=f[e];t&&f.push([Date.now()])}function j(){const e=f.length-1,[,t]=f[e],n=["hidden","visible"].indexOf(document.visibilityState),o=Boolean(n);-1!==n&&(o?t&&f.push([Date.now()]):!t&&f[e].push(Date.now()))}const I=(0,t.u)((e=>{if((0,t.h)()<90)return;const n=[[${i.k.eventParamNumber}.percent_scrolled,90]];D(e,{type:v,event:n}),document.removeEventListener("scroll",l)}));function M(e){const t=[[i.k.enagementTime,_()]];D(e,{type:h,event:t})}function k(e){m||(u=$.bind(null,e),l=I.bind(null,e),d=M.bind(null,e),document.addEventListener("visibilitychange",j),document.addEventListener("scroll",l),document.addEventListener("click",u),window.addEventListener("blur",S),window.addEventListener("focus",x),window.addEventListener("beforeunload",d))}function D(...e){const[t,{type:n,event:o,debug:i}]=function(e){const t=window.minimalAnalytics?.trackingId,n="string"==typeof e[0]?e[0]:t,o="object"==typeof e[0]?e[0]:e[1]||{};return[n,{type:g,...o}]}(e);if(!t)return void console.error("GA4: Tracking ID is missing or undefined");const s=b(t,{type:n,event:o,debug:i}),r=window.minimalAnalytics?.analyticsEndpoint||"https://www.google-analytics.com/g/collect";navigator.sendBeacon(${r}?${s}),k(t),m=!0}e.track=D,r&&(window.track=D),a&&D()})(),o})()));
                </script>

    <script>

So, do you see anything unexpected here?

Thanks,

Alwin

Thank you, so if I understand correctly a browser never serve the old (browser) cached version without cheking for a new version first?

I have decided to continue using wp-rocket for the time being. Thanks for all the help so far!

Thanks for your help, but I still don’t have an answer to my original question: why aren’t all pages cached?

I just checked my website and 5 out of 12 pages are now not cached by wp-optime! These 5 pages are in the list of cached pages in the server folders /wp-content/cache/wpo.

So what’s going on with the wp-optime plugin?