---
title: "Purge Module Invalidating Varnish Too Frequently"
date: "2023-07-13T16:02:18+00:00"
summary:
image:
type: "article"
url: "/acquia-cloud-platform/help/94686-purge-module-invalidating-varnish-too-frequently"
id: "0496f495-ebc6-4226-abeb-7cb5652e68da"
---

Issue
-----

When the acquia\_purge module has been implemented the way [we normally recommend](/node/92966), some customers may run into an issue where the varnish cache is being invalidated with unmanageable frequency.

Resolution
----------

### Blacklist Problematic Tags from Purge's Core Tags Queuer

Most commonly the tags which are causing this problem are **node\_list** and **views\_data**. Whichever tags may be at fault, the process is the same. Open your site's Purge configuration at the path: 

**/admin/config/development/performance/purge**  
  
Then, from the "Core tags queuer" dropdown menu, select "Configure."  
  

![Web interface showing queue management options with dropdown menu, database, and processor settings. Sidebar displays queue details and configuration information.](https://acquia.widen.net/content/ac9be7be-42f6-4ab6-98e2-6700e954a137/web/ka06g000001ZKGp00N6g00000VCdgi0EM6g000004ofRZ.png)

  
  
From the resulting dialog box, click the "Add prefix" button.  
  

![Popup window titled "Configure Core tags queuer" with editable fields and options to add prefixes or save configuration.](https://acquia.widen.net/content/072990a9-ccca-4182-9a08-bad08727fb6f/web/ka06g000001ZKGp00N6g00000VCdgi0EM6g000004ofRt.png)

  
  
Finally, add the new tags to the list and then click on the "Save configuration" button.  
  
This should stop those specific tags from invalidating your site's Varnish cache.  
  
On the backend this is a configuration change to **purge\_queuer\_coretags.settings**. Be sure to follow your site's [configuration management](/node/56161) protocols to safely make this change in your production environment.