Title: Excessive disk write with fallback cache enabled
Last modified: September 6, 2023

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# Excessive disk write with fallback cache enabled

 *  Resolved [peteyio](https://wordpress.org/support/users/peteyio/)
 * (@peteyio)
 * [2 years, 9 months ago](https://wordpress.org/support/topic/excessive-disk-write-with-fallback-cache-enabled/)
 * Firstly, amazing plugin – it works flawlessly and does exactly what it says.
 * I currently deploy this on a client site who runs a large news website. They 
   have around 50,000 articles and generate a decent amount of traffic. We implemented
   the Cloudflare Workers setup and all is well there.
 * Yesterday, I decided to enable fallback cache and disable WP Rocket entirely,
   in favor of using Perfmatters for achieving the performance elements of WP Rocket.
   Essentially the setup is;
 * Super Page Cache > Cloudflare Workers + Fallback Cache enabled
   Perfmatters
 * The fallback cache has generated around 30GB of fallback cache files, which is
   expected, and growing further (also fine). What isn’t so good, is the excessive
   disk writes being performed ever since enabling fallback cache. In a 12 hour 
   period, I have logged 2TB (yes, terabyte) of disk writes to storage. If I disable
   fallback cache, this immediately stops.
 * Is there any reason as to why this might be happening?

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

 *  Thread Starter [peteyio](https://wordpress.org/support/users/peteyio/)
 * (@peteyio)
 * [2 years, 9 months ago](https://wordpress.org/support/topic/excessive-disk-write-with-fallback-cache-enabled/#post-17031185)
 * For verification, at one point 100MB/s of data was being written. When I then
   disabled Fallback cache, it dropped back down to 1MB/s. As the fallback cache
   grows in the size, the data written per second is getting progressively worse–
   it’s extremely strange.
 *  Plugin Contributor [iSaumya](https://wordpress.org/support/users/isaumya/)
 * (@isaumya)
 * [2 years, 9 months ago](https://wordpress.org/support/topic/excessive-disk-write-with-fallback-cache-enabled/#post-17033734)
 * Hi [@peteyio](https://wordpress.org/support/users/peteyio/),
   For large sites,
   I will recommend you not to use fallback cache and preloader for large sites.
   Also instead of using the workers, you can try out the new Cache Rule: [https://gist.github.com/isaumya/af10e4855ac83156cc210b7148135fa2](https://gist.github.com/isaumya/af10e4855ac83156cc210b7148135fa2)

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

The topic ‘Excessive disk write with fallback cache enabled’ is closed to new replies.

 * ![](https://ps.w.org/wp-cloudflare-page-cache/assets/icon-256x256.gif?rev=3234997)
 * [Super Page Cache – Cloudflare Cache, Page Speed & Core Web Vitals](https://wordpress.org/plugins/wp-cloudflare-page-cache/)
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 * 2 replies
 * 2 participants
 * Last reply from: [iSaumya](https://wordpress.org/support/users/isaumya/)
 * Last activity: [2 years, 9 months ago](https://wordpress.org/support/topic/excessive-disk-write-with-fallback-cache-enabled/#post-17033734)
 * Status: resolved