In most of the application in SAP Cloud ALM for operations you can find the used memory and the appropriate Housekeeping Settings to influence the Total Memory size needed. Here are the links to the description of the housekeeping settings of the different applications:

• Business Process Monitoring
  
• Integration & Exception Monitoring
• Real User Monitoring
• Synthetic User Monitoring
• Job & Automation Monitoring
• Configuration & Security Analysis
• Health Monitoring