What is the exact formula for Cloud Capacity Unit calculations?¶

The current formula utilized for these calculations is:

• 4GB Memory = 1 CCU
• 2 CPU Cores = 1 CCU

Additional formulas will be added over time as new technologies are added to the Cloud Platform.

Do Cloud Capacity Units impact how I will be billed?¶

For subscribers with server-based subscriptions, Cloud Capacity Units are informational only, unless your environments have been upgraded to Cloud Next, which is powered by serverless technologies. Subscriptions which exceed the total Cloud Capacity Unit equivalent of contracted infrastructure capacity may be subject to additional fees if the elevated utilization recurs or persists.

For subscribers with subscriptions that leverage Acquia’s Views and Visits model, Cloud Capacity Units are a component of Resource Limits. Subscriptions that exceed the Resource Limits guidelines associated with your contracted Views and Visits capacity may be subject to additional fees if the elevated utilization recurs or persists.

What benefits do I get from Cloud Capacity Units?¶

Once Cloud Capacity Units become the primary resource tracking metric for a subscription, they will provide a number of benefits to Cloud Platform subscribers.

• CCUs eliminate the need for subscribers with server-based pricing to choose CPU-optimized or memory-optimized infrastructure, as the platform will allocate either CPU or Memory to applications as needed and track utilization as a single metric.
• CCUs on Cloud Next environments are tracked per-environment, providing more granular utilization data than current per-server metrics. For Cloud Platform environments that have not yet been upgraded to Cloud Next, however, they will continue to be tracked per-server.
• CCUs provide more granular data per-service than server-based metrics. As new technologies are released on Cloud Platform, subscribers will gain insights into utilization from the following isolated services: load balancing, PHP, SSH, cron, Cloud hooks, file system, and database.

Do Cloud Capacity Units include Storage Utilization?¶

At this time, CCUs do not include storage utilization, which is tracked separately on the Cloud Platform.

How do Cloud Capacity Units impact Acquia’s Views/Visits (Cloud Platform) or Dynamic Request (Site Factory) models?¶

At this time, CCUs will only be used for diagnostic purposes for subscribers on these pricing models.

What should I do if my CCUs spike or drop unexpectedly?¶

Since CCUs can serve as an indicator of an application’s health or performance, you should attempt to correlate unexpected spikes or drops in Cloud Capacity Units with development activities such as code changes, site configuration changes, and environment configuration changes, or with changes in traffic. While modest spikes in CCUs should be expected during mid-day traffic peaks or whenever cron runs, unexpected spikes that jump too high and occur too often could be indicative of a caching or configuration problem that could lead to a temporary resource limit being imposed on your environment by Acquia. In the unlikely event that this happens, create a Support ticket.

What are the benefits of application monitoring tools?¶

Application monitoring tools, such as New Relic, help you to monitor live Drupal and other PHP applications, troubleshoot issues, and tune applications for optimal performance. For example, you might experience delay while accessing your site. This issue might occur when your PHP execution time is high. However, you can be sure about the exact issue only when you leverage such tools. Acquia recommends that you enable New Relic to troubleshoot issues with your application. For more information, see Claiming your New Relic APM Pro account.