Performance Tuning Guide - EMC Community Network

Chapter 4
Designing the Application
This chapter provides guidelines for improving performance of TaskSpace forms and includes the
following topics:
• General design guidelines, page 35
• Preventing high load user actions, page 36
• Improving login speed, page 36
• Maximizing query yield, page 36
• Designing the process object model (using structured datatypes), page 37
• Converting simple process variables to SDTs, page 40
• Minimizing form size, page 40
• Designing search forms, page 42
• Designing task lists (work queues), page 47
• Rendering task lists, page 49
• Using task history (audit trail), page 51
• Embedding documents (document viewing), page 51
• Using adaptors, page 52
• Managing group memberships, page 53
General design guidelines
As you design your application, keep in mind the following general guidelines:
• Avoid excessive subtyping in your object model. Each layer in your object model involves
additional joins of database tables, which affects performance. Keep the inheritance hierarchy in
your object model as flat as possible.
• Tune your queries for the highest yield, where yield is the number of times a query executes
multiplied by query execution time. In some cases, achieving the highest yield involves
de-normalizing a database table by pulling attributes into one or two physical tables.
• Avoid designing forms with functions that are not likely to be used often. The best performing
applications enable users to complete their jobs with a minimum number of actions and choices.
EMC Documentum xCP 1.0 Performance Tuning Guide 35