# Criteria


 A set of conditions that specify which recommended action qualify for implementation. When a rule is active and a recommended action matches these criteria, Compute Optimizer implements the action at the scheduled run time. You can specify up to 20 conditions per filter criteria and 20 values per condition. 

## Contents


 ** ebsVolumeSizeInGib **   <a name="computeoptimizer-Type-automation_Criteria-ebsVolumeSizeInGib"></a>
Filter criteria for EBS volume sizes in gibibytes (GiB).  
Type: Array of [IntegerCriteriaCondition](API_automation_IntegerCriteriaCondition.md) objects  
Required: No

 ** ebsVolumeType **   <a name="computeoptimizer-Type-automation_Criteria-ebsVolumeType"></a>
Filter criteria for EBS volume types, such as gp2, gp3, io1, io2, st1, or sc1.  
Type: Array of [StringCriteriaCondition](API_automation_StringCriteriaCondition.md) objects  
Required: No

 ** estimatedMonthlySavings **   <a name="computeoptimizer-Type-automation_Criteria-estimatedMonthlySavings"></a>
Filter criteria for estimated monthly cost savings from the recommended action.  
Type: Array of [DoubleCriteriaCondition](API_automation_DoubleCriteriaCondition.md) objects  
Required: No

 ** lookBackPeriodInDays **   <a name="computeoptimizer-Type-automation_Criteria-lookBackPeriodInDays"></a>
Filter criteria for the lookback period in days used to analyze resource utilization.  
Type: Array of [IntegerCriteriaCondition](API_automation_IntegerCriteriaCondition.md) objects  
Required: No

 ** region **   <a name="computeoptimizer-Type-automation_Criteria-region"></a>
Filter criteria for Amazon regions where resources must be located.  
Type: Array of [StringCriteriaCondition](API_automation_StringCriteriaCondition.md) objects  
Required: No

 ** resourceArn **   <a name="computeoptimizer-Type-automation_Criteria-resourceArn"></a>
Filter criteria for specific resource ARNs to include or exclude.  
Type: Array of [StringCriteriaCondition](API_automation_StringCriteriaCondition.md) objects  
Required: No

 ** resourceTag **   <a name="computeoptimizer-Type-automation_Criteria-resourceTag"></a>
Filter criteria for resource tags, allowing filtering by tag key and value combinations.  
Type: Array of [ResourceTagsCriteriaCondition](API_automation_ResourceTagsCriteriaCondition.md) objects  
Required: No

 ** restartNeeded **   <a name="computeoptimizer-Type-automation_Criteria-restartNeeded"></a>
Filter criteria indicating whether the recommended action requires a resource restart.  
Type: Array of [StringCriteriaCondition](API_automation_StringCriteriaCondition.md) objects  
Required: No

## See Also


For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\$1\$1](https://docs.amazonaws.cn/goto/SdkForCpp/compute-optimizer-automation-2025-09-22/Criteria) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/compute-optimizer-automation-2025-09-22/Criteria) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/compute-optimizer-automation-2025-09-22/Criteria)