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3.1.5 Use sequential system lane activities efficiently
Each system lane activity is considered a new Event Manager task, which adds a task
transition in the Process Server. These task transitions are expensive. If your BPD contains
multiple system lane service tasks in a row, use one system lane task that wraps the others to
minimize the extra resources needed for these transitions. Using one system lane task also
applies for multiple consecutive tasks in a participant lane, although that pattern is much less
common because generally an action is necessary between each task in a participant lane.
Figure 3-3 demonstrates a poor usage pattern (with multiple consecutive system lane
activities).
Figure 3-3 Poor BPD usage pattern
Figure 3-4 shows a more optimal usage pattern (one system lane activity that incorporates
the multiple activities in Figure 3-3).
Figure 3-4 Good BPD usage pattern
26 IBM Business Process Manager V8.0 Performance Tuning and Best Practices