---
sourceDocument: Brazil IT Operations Management
sourceDocumentLink: https://www.servicenow.com/docs/r/it-operations-management

 Release :

    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil IT Operations Management

ft:clusterId :

    - itom

bundleId :

    - itom

workflow :

    - Technology


---

# Use custom alert rules

# Using alert rules to control when Health Log Analytics generates alerts {#ariaid-title1}

Release version: Brazil  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read  
Alert rules enable you to set conditions that determine when Health Log Analytics (HLA) triggers an alert.
HLA detects anomalies automatically by learning from your log data. However, some log types need custom alert rules to generate alerts reliably. For more information, see [Alert rules in Health Log Analytics](https://www.servicenow.com/docs/mJs4w84c4YGO4Gfe18HCiA "Health Log Analytics (HLA) detects anomalies automatically by learning from your log data. However, some log types require a custom alert rule to generate alerts reliably.").  
You can define, change, or delete custom alert rules:

* [Define a custom Log Analytics alert rule in Health Log Analytics](https://www.servicenow.com/docs/CYo_ubmwlQbYsiecEqIJXg "Define a custom Log Analytics alert rule for log data that might not generate alerts automatically. A custom rule enables you to specify the metric, threshold, and alert properties directly.")

  Define a Log Analytics alert rule for log data that is not generating alerts automatically.
* [Change a custom Log Analytics alert rule in Health Log Analytics](https://www.servicenow.com/docs/Gfl80cH3iRA2n4sMZJPqQw "Modify a Log Analytics alert rule that you have defined.")

  Edit a Log Analytics alert rule that you have defined.
* [Delete a custom Log Analytics alert rule in Health Log Analytics](https://www.servicenow.com/docs/Uzw6EjmR3SxmE_URhKmy3Q "Delete a Log Analytics alert rule that you have defined if it is no longer necessary.")

  Delete a Log Analytics alert rule that you have defined if it's no longer needed.
{#hla-alert-rules-manage__ul_efr_lf2_32c}