topic Re: Is Instance Saturation relevant for Shared Instances? in ArcGIS Monitor Questions

Is Instance Saturation relevant for Shared Instances?

MichaelJenkins — Wed, 15 Oct 2025 16:48:45 GMT

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?

Re: Is Instance Saturation relevant for Shared Instances?

CodyPatterson — Wed, 15 Oct 2025 17:26:43 GMT

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-100/m-p/1637410#M2926

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

Re: Is Instance Saturation relevant for Shared Instances?

MichaelJenkins — Wed, 15 Oct 2025 17:49:39 GMT

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.

Re: Is Instance Saturation relevant for Shared Instances?

NickN — Fri, 30 Jan 2026 20:43:07 GMT

I also saw this after upgrading Monitor to 2025. I created a Collection where Instance Type was Shared then went into the Metrics for that Collection, searched by Saturation, selected them all, then bulk edited and disabled alerting on those.