System Load and Concurrency Limits

This section shows how many concurrent operations of a given type Oracle Private Cloud Appliance can manage at any given time. The limits presented in the table apply across the entire system and all tenancies. For each of these limits it is assumed that no other operations of any kind are running at the same time. When a limit is exceeded, an error with code 409 or 429 is displayed.

Resource Type	Operation	Concurrency Limit
compute instance	back up or restore an instance	10
compute instance	launch/terminate instance	15
compute instance	reset/stop/start instance	15
compute instance	update fault domain (live migration)	10
compute image	create image from instance	10
compute image	import image	10
block volume	create/delete volume	10
block volume	attach/detach boot volume	15
block volume	attach/detach data volume	15
block volume	resize volume	15
file system	create/delete file system	10
mount target	create/delete mount target	10
VCN	create/delete VCN	10
VCN gateway	create/delete gateway (all types)	10
subnet	create/delete subnet	10
route table	create/delete route table	10
security list	create/delete security list	10
network security group	create/delete network security group	10
VNIC	attach/detach VNIC	15
public IP	create/delete public IP	10
private IP	create/delete private IP	10
all networking resources	update network resource	10
Kubernetes cluster	create/update/delete cluster	10
Kubernetes node pool	create/update/delete node pool	5
Kubernetes node	create/update/delete node	15

Note:

In addition, there is a system limit on the number of concurrent user sessions:

• Compute Web UI: 10 tenancy users

• Service Web UI: 6 administrators

An authentication error is displayed when the limit is reached. An inactive user session times out after 1 hour.