| Use the HTTP Session Sizing worksheet to estimate the JVM memory required to support HTTP sessions. Please see Chapter 6 for a complete description of the data and calculations in the worksheet. Also, see Chapter 10, Case Study: Preparing to Test, for an example using this worksheet. Input Data | | Input Data | Source of Data | Your Data | | 1. | User arrival rate (in seconds) | Capacity Sizing worksheet, line 11 | | | 2. | Average user visit time | Capacity Sizing worksheet, line 5 | | | 3. | Planned HTTP session timeout interval (in minutes) | System administrator | | | 4. | HTTP session size (per user) | Network Capacity Sizing worksheet, line 7 | | Calculating HTTP Session Memory Requirement | | Calculated Data | Calculation | Total | | 5. | Average time user session stays resident in memory (in minutes) | Average user visit time + Session timeout Line 2 + Line 3 | | | 6. | Number of user sessions in memory | User arrival rate * Average time session in memory Line 1 * Line 5 | | | 7. | HTTP session memory required | Number of user sessions in memory * HTTP session size Line 6 * Line 4 | | |