Hortonworks Streaming Analytics Manager User Guide
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Configure Deployment Settings

Before deploying the application, it is important to configure deployment settings such as JVM size, number of ackers, and number of workers. Because this topology uses a number of joins and windows, you should increase the JVM heap size for the workers. Click the gear icon on the top right corner of the canvas, and increase the number of workers (e.g: 5) and increase the JVM heap memory (-Xmx3072m).