Title: Increased server load/TTFB on WPEngine
Last modified: September 1, 2016

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# Increased server load/TTFB on WPEngine

 *  Resolved [jr](https://wordpress.org/support/users/johnmroberts/)
 * (@johnmroberts)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/increased-server-loadttfb-on-wpengine/)
 * Hi Frank,
 * We’re using the settings that are recommended in your previous posts for woocommerce,
   but we see quite a significant TTFB c.4 seconds [on our site](https://wp.edapt.org.uk).
   The host is WPEngine and they tell us that this is due to the autoptimize plugin.
   Whilst the site loads quicker overall with automptimize activated, the TTFB is
   too high. Do you have any recommendations for this specific environment?
 * Thanks,
    John
 * [https://wordpress.org/plugins/autoptimize/](https://wordpress.org/plugins/autoptimize/)

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Frank Goossens](https://wordpress.org/support/users/futtta/)
 * (@futtta)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/increased-server-loadttfb-on-wpengine/#post-7574648)
 * afraid this is not AO’s doing John; typically as soon as a page is cached (by
   WPEngine’s varnish implementation), Autopitmize isn’t called upon, as the autoptimized
   files referenced in the HTML are cached and served as static content.
 * I did a quick webpagetest.org test with and without AO and your TTFB is actually
   way to long in both situations:
 * [with AO](http://www.webpagetest.org/result/160715_SM_FWB/); TTFB 4.926s, doc
   complete 7.580s, fully loaded 9.303s, 25 requests
    [without AO](http://www.webpagetest.org/result/160715_EP_G7E/);
   TTFB 4.499s, doc complete 7.594s, fully loaded 12.713s, 56 requests
 * Some interesting HTTP response headers (following a request for the homepage)
   for you (and wpengine) to study;
 * >  Server:”cloudflare-nginx”
   >  X-Cache:”MISS” x-cacheable:”NO:Passed” x-pass-why:”
   > logged-in”
 * I _think_ the second one is from WPE and the others are from Cloudflare.
 * So my hunch; there’s an issue with the page cache setup, the fact that you’re
   on wpengine (which has page caching) and cloudflare (which has caching as well)
   might be complicating things.
 * Hope this helps,
    frank
 *  Thread Starter [jr](https://wordpress.org/support/users/johnmroberts/)
 * (@johnmroberts)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/increased-server-loadttfb-on-wpengine/#post-7574651)
 * Hi Frank,
 * Thank you. That’s very useful.
 * I’ll let you know if CF/WPEngine have any further thoughts on this.
 * John

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Increased server load/TTFB on WPEngine’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [jr](https://wordpress.org/support/users/johnmroberts/)
 * Last activity: [9 years, 11 months ago](https://wordpress.org/support/topic/increased-server-loadttfb-on-wpengine/#post-7574651)
 * Status: resolved