Is Instance Saturation relevant for Shared Instances?

[MichaelJenkins]

I am seeing some critical alerts in ArcGIS Monitor 2025.x that show several services are at 100% instance saturation.  However, these services are configured to use the shared instance pool.

Does this mean that the shared instance pool is maxed out?   Or is it just a false alarm?

[CodyPatterson · Accepted solution]

Hey @MichaelJenkins 

It appears that this is currently a bug, here is a link to a post that I had commented on in the past: https://community.esri.com/t5/arcgis-monitor-questions/monitor-2025-0-shared-instance-saturations-at...

The content:

It appears that this is a bug according to this post: https://community.esri.com/t5/arcgis-monitor-questions/instance-count-for-shared-services-after-arcg...

Here is the slated workaround offered by the answering user:

"

I went into ServerAdmin and just changed the max maxInstancesPerNode value to 1 and left the minInstancesPerNode at 0 and am now getting small percentage sat values (like 0.45, 0.56, etc) for these services in the shared instance:

Configured State
Started

Instance Type
Shared

Instance Limits
0 min - 16 max

"

I would raise an issue with support and bring more attention to this bug as well!

Cody

[MichaelJenkins]

Thank you for the quick response and the helpful information.   We have too many services to do a per-service workaround, so I think I will just disable that metric for now.    I will open a support ticket to raise awareness and try to get our ticket attached to the BUG, if it exists.