Mod_pagespeed installed but filters not running on page. No pagespeed headers present

September 28, 2016 1.7k views
LAMP Stack Apache Ubuntu 16.04

I’ve just started a standard LAMP DigitalOcean droplet and installed Google Pagespeed. The package is installed and listed in /etc/apache2/mods-enabled/

I have added the following items to the pagespeed.conf

ModPagespeedEnableFilters prioritize_critical_css                   
ModPagespeedEnableFilters lazyload_images,inline_preview_images,insert_image_dimensions
ModPagespeedEnableFilters resize_mobile_images,insert_image_dimensions

Which I have used on previous projects. For some reason none of these filters are being run. Inspecting the headers being passed from the server show no pagespeed headers.

I don’t seem to be running across any errors anywhere and I am stuck as to what to look for next.

2 Answers

It turns out it was the CMS I am using. It uses the registershutdownfunction from php which with a call back introduces no-pragma and breaks pagespeed

After enabling the mod with a2enmod pagespeed did you ensure that you restarted the apache process with service apache2 restart?

In some instances modexpires is also required in order to use modpagespeed. It can be enabled with a2enmod expires; service apache2 restart

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