• WP Engine contacted me because they were noticing 504 errors on my site. Here’s what they said:

    “After investigating, we were able to track it down to the plugin simple-custom-css. One each and every page load the following request is made:

    /?sccss=1&ver=4.9.5

    Or some variation thereof. All of these requests are being processed by Apache, which means that any visit to your site is essentially uncached. We use a queueing system for processes to be handled by Apache. As uncached requests and processes come in, the queue fills, processes are sometimes dropped especially during periods of over-utilization of Apache resources. This results in a 504.

    For your site, all requests are being passed over to Apache because of this plugin. So, any type of bump in traffic, or if requests come in too quickly can result in a 504. It may be better to look into another way to handle custom CSS or Dynamic CSS in order to ensure it’s cacheable, and that should alleviate the 504s.”

    Is there any way to make the plugin cacheable?

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