kerwan

I’ve been able to setup a Memcached on W3TC hosted on AWS Elastiscache.
I found what was the culprit for our 404 pages (auto rewriting of .htaccess).

An other problem happen now we are using Memcached.
On some pages (such as Products Page) do not show the same content (same price) to each users. So, we cannot enable Page Cache on theses pages.

But as you can see here : https://imgur.com/a/WJcChWw
Without Page caching, we have a huge amount of requests to the Memcached server which results in a high I/O latency (1.13s).

Here is an example of a page with Page Caching : https://imgur.com/a/pWQp8Nc
As you can see, there is only 2 requests to the Memcached server in a total of 5ms of I/O.

Is there any solutions for pages that do not use Page Cache and need to run a lot of database queries ?
Maybe I should continue to use “Disk” for Object Caching ?

Hi and thanks for this perfectly detailed answer !

In resume, what would be the ideal configuration to fit our infrastructure ?
– Page Cache – Yes (Disk) (With shared cache folder ?)
– Database Cache – No
– Object Cache – Yes (Which engine ?)

It’s an eCommerce Website with ~200 concurrent users, our database can handle a lot of requests (we only use <10% of the CPU).

The website is running on Kubernetes and we have ~4 instances running at the same time.

Thanks in advance !