4.2.1

Modify the Number of Concurrent and Pending Workflows
By default, Orchestrator permits 300 workflows to run at the same time. When the Orchestrator server has to
run more than 300 concurrent workflows, the pending workflow runs are queued. When an active workflow
run completes, the next workflow in the queue starts to run. If the maximum number of queued workflows is
reached, the next workflow runs fail until one of the pending workflows starts to run.
By setting system properties in the Orchestrator vmo.properties configuration file, you can control the number
of workflows that are running at the same time and the number of pending workflows that are waiting in a
queue.
IMPORTANT If your system is configured with one CPU, the recommended maximum value of the
com.vmware.vco.workflow-engine.executors-count property is 100. If the number of concurrent workflows is
higher than 100, you might reach the maximum number of threads per processor.
Procedure
1 Navigate to the following folder on the Orchestrator server system.
Option Action
If you installed Orchestrator with the
vCenter Server installer
Go to
install_directory \VMware\Infrastructure\Orchestrator\app-
server\server\vmo\conf.
If you installed the standalone
version of Orchestrator
Go to install_directory \VMware\Orchestrator\app-
server\server\vmo\conf.
2 Open the vmo.properties configuration file in a text editor.
3 Set the com.vmware.vco.workflow-engine.executors-count and com.vmware.vco.workflow-
engine.executors-max-queue-size properties by adding the following lines to the vmo.properies file.
com.vmware.vco.workflow-engine.executors-count= 200
com.vmware.vco.workflow-engine.executors-max-queue-size= 5000
4 Save the vmo.properties file.
5 Restart the Orchestrator server.
You set the maximum values for concurrent and pending workflows. You can run up to 200 workflows and
5000 workflows can be queued if the number of actively running workflows is reached.
Administering VMware vCenter Orchestrator
54 VMware, Inc.