How to Insert “Must-Revalidate” for Magento Cache

This tip is helpful to stop the client from caching content.

Directions:

Open your local XML file.

This can be found in the [Magento Root]/app/etc/local.xml

Locate the follow area under the <global> node, and insert the code from line 26:
[sourcecode language=”html”]








false







1








[/sourcecode]
After you save and commit your changes, clear your Magento cache for the site.

Log into your Magento Dashbaord, and go to Systems > Cache Management

Next, select all the the Cache Types. Set your Action to: Refresh, and click the orange Submit button

We advise not to run this action for more than a week to maintain positive performance.