Tracing levels in Informatica define the amount of data you wish to write in the session log when you execute the workflow. The tracing level is a very important aspect of Informatica, as it helps in analyzing errors.
The Informatica Workflow Monitor is used to monitor the execution of Workflows or Tasks assigned in the Workflow. Generally, Informatica PowerCenter helps you to track the Event Log information, list of executed Workflows, and their execution time in detail.
Informatica PowerCenter supports the usage of multiple external loaders (IBM DB2, Oracle, Teradata, and Sybase IQ), which can help in loading data in the target table faster. This will help in enhancing the performance by loading the data at a faster pace in the target.
Session Logs Information: Whenever a session runs, the integration service logs the information about the tasks that it performs in a file called session log file. The integration service logs details like load summary, transformation statistics etc.
A session is a set of instructions that tells the Integration Service how to move data from sources to targets. A workflow is a set of instructions that tells the Integration Service how to execute tasks, such as sessions, email notifications, and shell commands.
When you enable error logging, the Integration Service does not generate a reject file or write dropped rows to the session log. Without a reject file, the Integration Service does not log Transaction Control transformation rollback or commit errors.
No, there is no configuration to limit running processes that specifically targets sessions that are executed by a Workflow enabled for concurrent execution. The existing process limit applies to all sessions without differentiating between those from non-concurrent or concurrent enabled Workflows.
Session property is a set of instructions that instructs Informatica how and when to move the data from source to targets. A session property is a task, just like other tasks that we create in workflow manager. Any session you create must have a mapping associated with it.
These logs are later verified and the rejected records are reloaded after making corrections. As a simple example if we define the criteria that an employee record where salary =0 or null should not be loaded into the target table will be routed to the reject table/error log using a router transformation.
Individual mappings may be invalid if a mapped source object is no longer present after editing a schema, if there is a required/optional mismatch with the cardinality of a target field, or if source and target fields have incompatible data types.
Complete the following tasks to improve session performance:
- Optimize the target.
- Optimize the source.
- Optimize the mapping.
- Optimize the transformation.
- Optimize the session.
- Optimize the grid deployments.
- Optimize the PowerCenter components.
- Optimize the system.
You can check whether the Informatica Server is running by entering the command ps -elf |grep pmserver . If it lists pmserver process, the server is running. If it lists grep pmserver, that is the process of the ps command.
Sessions cannot be executed independently, a session must be added to a workflow. In session object cache properties can be configured and also advanced performance optimization configuration.
Use the following methods to identify performance bottlenecks:
- Run test sessions. You can configure a test session to read from a flat file source or to write to a flat file target to identify source and target bottlenecks.
- Analyze performance details.
- Analyze thread statistics.
- Monitor system performance.
Update/insert records without using update strategy
- Insert: – Treat all rows as inserts.
- Delete: – Treat all rows as deleted.
- Update: – Treat all rows as updates.
- Data Driven :- Integration Service follows instructions coded into Update Strategy flag rows for insert, delete, update, or reject.
