How can I fix "Limit reached" error in APM Insight Monitor?
What happens when the limit is reached?
No negative impact on existing monitoring. All already-tracked items continue to be fully monitored (call frequency, response times, metrics remain visible). Only new unique entries beyond the limit are dropped. Existing entries that become unused/inactive are automatically cleaned up after the Raw Data Retention period (default 10 days), freeing up room for new ones.
Increase Limits in Applications Manager :
- Limits apply at APM Insight Application level, NOT per Instance.
- Configure from: Settings Tab > Performance Polling > APM Insight > Data Collection Limits.
What can be optimized :
Important: Only Web Transactions and Background Transactions can be grouped/optimized via agent config. All others (DB Operations, Exceptions, Components, App Parameters) cannot — only option is increasing the limit.
Optimizing Web / Background Transaction Count :
- Agent config options to reduce count:
- List of URL extensions to be skipped from tracking.
- List of exceptions to be skipped from tracking.
- Skip Transactions.
- Java Agent: Group Similar Transactions | Context based Monitoring
- .NET Agent: Group Similar Transactions
- Ruby Agent: Group Similar Transactions
- PHP Agent: Group Similar Transactions
Note: Grouping affects only new transactions. Existing ones clean up after Raw Data Retention period (default 10 days) if unused/inactive. For quick cleanup, contact appmanager-support@manageengine.com with exported Transaction list:
- APM tab > Your Application/Instance > Transaction tab > 'Fetch All Applications' (bottom) > 'Export as Excel' (right corner).
For Database Operations, Exceptions, Components & App Parameters (Cannot be optimized via agent config) :
- These cannot be grouped or optimized. Only option: increase limits within the allowed range:
| Parameter | Allowed Range (Per Application) |
|---|---|
| Web Transactions | 350 - 2000 |
| Background Transactions | 300 - 2000 |
| Exceptions | 150 - 500 |
| Database Operations | 500 - 1000 |
| Components | 200 - 400 |
| App Parameters | 50 - 200 |
Reference: APM Insight Data Collection Limits
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