Sizing APM Central instances

APM Central is sized according to the following table:

APM Central sizes

_{* An additional 100 GB minimum on a secondary disk is recommended for storing traffic data. For additional information, see the APM Central storage requirements in the System requirements.}

As more traffic is added to the system, you must re-evaluate APM Central capacity to ensure that the increased load is not a problem. 

Sizing for concurrent pages and sessions

The size that you choose to deploy might depend on the number of concurrent sessions or pages that APM Central must process:

• Low — 50,000 pages or 150,000 sessions
• Medium — 70,000 pages or 210,000 sessions
• High — 90,000 pages or 275,000 sessions

Increased traffic volume usually correlates to more users requesting more web pages. However, a given site can have a high traffic rate and a low number of users (or vice versa). So, independent of the traffic volume, you might have to adjust the resource allocation of APM Central to accommodate page- and session-tracking needs.