Knowledge Base - Articles

Posted 12 May 2017

You have three options when it comes to using or adding an additional key.

  • First option is to update your SSH local config file to include any additional keys with an updated IdentifyFile of /path/to/private.key

  • Second, is to specify the identify file to use for that one connection.

Example: ssh -i /path/to/private.key

Posted 02 May 2017

In the self service SSL section of the Cloud UI, you can now choose to upload an SSL Certificate to the load balancer pair for one or more Environment(s) or to an Elastic Load Balancer (ELB) for the Production environment. 

Posted 14 Apr 2017

Memcached is a key-value store that plays a critical role in any Drupal site's caching strategy on Acquia Hosting. Memcached may seem like a black box, but with a little research, we can demystify many of its confusing aspects.

Posted 07 Apr 2017

Drupal 8 introduced a robust and thorough caching API. Render caching is enabled by default for many elements such as pages, entities, blocks, and views. Items in this cache do not currently expire. On a site with heavy traffic or a great deal of cache contexts, this may cause the cache_render table to rapidly increase in size. A core bug exists to track the issue.

Posted 07 Apr 2017

The validator for Google's Accelerated Mobile Pages will display "The tag 'script' is disallowed except in specific forms" if New Relic is enabled. The JavaScript takes the form of a `script` tag added after the first `meta` tag, and looks like this:

Posted 21 Mar 2017

A wildcard certificate is an SSL certificate which can be used with multiple subdomains of a domain. The principal use is for securing web sites with HTTPS.

A wildcard is often designated as * and cover sub domains such as:

It should be understood that a wildcard SSL cert will ONLY cover the domains at the level of the "*" and NOT two levels such as:

Posted 17 Mar 2017

Drupal 8 and certain contributed modules may increase the size of headers sent out with each response. On Acquia Cloud, the soft limit is 60 individual headers and/or a combined total of 23kb of header data. Requests which exceed the soft limit may serve 503 status codes from Varnish and 200 from the Apache backend. 

We are working towards a Varnish configuration change that will remove this soft limit. In the meantime you may need to adjust your site to emit less header data.

Posted 16 Mar 2017

Early Drupal composer-based builds frequently utilized '' to fetch drupal packages via Composer. This repository was fully deprecated on March 10th, 2017. Builds still using '' will cause composer update to fail unless the recommended changes noted below are made to your composer.json file. If you have Remote Administration (RA), automated updates will fail until the changes below are made.

Posted 15 Mar 2017

The new Acquia Cloud UI now allows you and your team to take control of, and manage your own SSL certificates. 

Here are some simple steps to quickly create and upload your SSL certificate to the environment on which you wish to have domains covered with the particular SSL certificate. 

Posted 13 Mar 2017

When installing an SSL certificate through our new Cloud UI, the Private Key will only auto-populate under these conditions:

  • The CSR was generated in our new Cloud UI (Not through another non-Acquia source and not in the old UI)
  • When you install the cert, be sure to click the Install link to the RIGHT of the CSR name. 

If you believe that you have met the above conditions and the Private Key is still NOT auto-populating, you should:

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