The scalability limit table outlines the recommended maximums on vRealize Orchestrator 8.x deployments.

Component

Scale targets More information
Virtual machines 35,000
vCenter connections 10 See vCenter Setup
Active nodes in a cluster 3 See Configure a vRealize Orchestrator Cluster
Concurrent running workflows 300 per node See Configuring the Workflow Run Properties
Queued running workflows 10,000 per node
Preserved workflow runs 100 per node
Log event expiration days 15