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Performance recommendations
This documentation contains general performance tips and recommendations to improve performance.
General performance overview
This documentation describes what takes place during product execution and presents performance tips and recommendations regardless of the platform on which a specific HCL Link product is running.
Command Server operation overview
The first step in trying to achieve performance improvements running the Command Server in your environment is to understand Command Server operation.
Command Server execution overview
When you want to achieve performance improvements when running the Command Server in your environment, you must understand Command Server execution.
Command Server execution time
When you want to achieve performance improvements when running the Command Server in your environment, you must understand the factors that can affect execution time.

Performance recommendations
This documentation contains general performance tips and recommendations to improve performance.
- General performance overview
  This documentation describes what takes place during product execution and presents performance tips and recommendations regardless of the platform on which a specific HCL Link product is running.
  - Performance measurement factors
    When analyzing how well an application has performed, there are potentially a large number of measurements that can be used to gauge workload efficiency in terms of the specific resources the application used.
  - Command Server operation overview
    The first step in trying to achieve performance improvements running the Command Server in your environment is to understand Command Server operation.
    - Command Server execution overview
      When you want to achieve performance improvements when running the Command Server in your environment, you must understand Command Server execution.
      - Command Server initialization
        When you want to achieve performance improvements when running the Command Server in your environment, you must understand Command Server initialization.
      - Command Server validation
        When you want to achieve performance improvements when running the Command Server in your environment, you must understand Command Server validation.
      - Command Server transformation
        When you want to achieve performance improvements when running the Command Server in your environment, you must understand Command Server transformation.
      - Command Server finalization steps
        When you want to achieve performance improvements when running the Command Server in your environment, you must understand the steps that Command Server takes to finalize its processes after execution.
      - Command Server execution time
        When you want to achieve performance improvements when running the Command Server in your environment, you must understand the factors that can affect execution time.
    - Command Server work and data files
      Depending on the conditions of the transformation, such as input data file size and processing complexity, work and data files can significantly affect performance.
    - Command Server paging settings
      To minimize the memory footprint during transformation, HCL Link keeps only a subset of the work and data file information in memory at a given time.
  - Map performance and tuning best practices
    Many functions available to users for developing HCL Link maps are very powerful and can perform difficult and complicated tasks. Some functions may sacrifice performance for powerful capabilities, and it is important to understand the implications of these.
- Glossary
  Performance related terms and definitions.

Command Server execution time

When you want to achieve performance improvements when running the Command Server in your environment, you must understand the factors that can affect execution time.

Execution time can be affected by various factors. When most transformation processes are executed, the transformation itself consumes the bulk of execution times. Complex validation logic in schemas, especially restarts, can increase the proportion of execution time spent in validation.

The map execution process occurs in a single thread. By using a single thread of execution, the overhead of context switching is avoided in heavily-loaded systems. Excess context switching on heavily loaded systems can quickly dominate execution.