This chapter describes Oracle SOA Infra metrics.
B2B Active Entities Metrics
This category provides information about B2B active entities metrics.
Number of Active Agreements
This metric shows the number of active agreements.
Metric Summary
The following table shows how often the metric's value is collected.
Number of Active Documents
This metric shows the number of active documents.
Metric Summary
The following table shows how often the metric's value is collected.
Number of Active Trading Partners
This metric shows the number of active trading partners.
Metric Summary
The following table shows how often the metric's value is collected.
B2B Document Metrics Table
This category provides information about B2B Document Metrics Table metrics.
Number of Inbound Messages
This metric shows the number of inbound messages.
Metric Summary
The following table shows how often the metric's value is collected.
Number of inbound message faults
This metric shows the number of inbound message faults.
Metric Summary
The following table shows how often the metric's value is collected.
Inbound Message Size (KB)
This metric shows the inbound message size.
Metric Summary
The following table shows how often the metric's value is collected.
Inbound Messages processing time
This metric shows the processing time for inbound messages.
Metric Summary
The following table shows how often the metric's value is collected.
B2B Document Name
This metric shows the B2B document name.
Metric Summary
The following table shows how often the metric's value is collected.
Number of Outbound Messages
This metric shows the number of outbound messages.
Metric Summary
The following table shows how often the metric's value is collected.
Number of outbound message faults
This metric shows the number of outbound message faults.
Metric Summary
The following table shows how often the metric's value is collected.
Outbound Message Size (KB)
This metric shows the outbound message size.
Metric Summary
The following table shows how often the metric's value is collected.
Outbound Messages processing time
This metric shows the processing time for outbound messages.
Metric Summary
The following table shows how often the metric's value is collected.
B2B Trading Partner Metrics
This category provides information about B2B Trading Partner metrics.
Number of inbound messages
This metric shows the number of inbound messages for B2B trading partners.
Metric Summary
The following table shows how often the metric's value is collected.
Number of inbound message faults
This metric shows the number of inbound message faults for B2B trading partners.
Metric Summary
The following table shows how often the metric's value is collected.
Inbound Message Size (KB)
This metric shows the inbound size of messages for B2B trading partners.
Metric Summary
The following table shows how often the metric's value is collected.
Processing time of Inbound Messages
This metric shows the processing time of inbound messages for B2B trading partners.
Metric Summary
The following table shows how often the metric's value is collected.
Trading partner name
This metric shows the name of the trading partner.
Metric Summary
The following table shows how often the metric's value is collected.
Number of outbound messages
This metric shows the number of outbound messages for B2B trading partners.
Metric Summary
The following table shows how often the metric's value is collected.
Number of outbound message faults
This metric shows the number of outbound message faults for B2B trading partners.
Metric Summary
The following table shows how often the metric's value is collected.
Outbound Message Size (KB)
This metric shows the outbound size of messages for B2B trading partners.
Metric Summary
The following table shows how often the metric's value is collected.
Processing time of outbound messages
This metric shows the processing time of outbound messages for B2B trading partners.
Metric Summary
The following table shows how often the metric's value is collected.
BPEL Engine Requests Rate Metric Table
Displays the BPEL Engine request related metrics
Active request throughput in the last 5 minutes
This metric shows the active request throughput in the last five minutes in the BPEL service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Last active request value
This metric shows the value for the last active request in the BPEL service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Scheduled request throughput in the last 5 minutes
This metric shows the scheduled request throughput for the last five minutes in the BPEL service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Last scheduled request value
This metric shows the value for the last scheduled request in the BPEL service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Business Rules Engine Cache Metrics Table
Displays the business rules service engine cache metrics.
Total Access Count since server startup
This metric shows the total access count since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of access count
This metric shows the last value of the access count in the business rules service engine cache.
Metric Summary
The following table shows how often the metric's value is collected.
Total Count since server startup
This metric shows the total count of objects in the cache since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of total count
This metric shows the last value of the total count.
Metric Summary
The following table shows how often the metric's value is collected.
Business Rule Engine Request Breakdown Rate Metric Table
Displays the path of a message/request within the service engine.
Request count since server startup
This metric shows the count of objects in the cache since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of requests in the last 5 minutes
This metric shows the request message throughput in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of request
This metric shows the value of the last request message.
Metric Summary
The following table shows how often the metric's value is collected.
Average request processing time
This metric shows the average request processing time for messages.
Metric Summary
The following table shows how often the metric's value is collected.
Number of completed requests
This metric shows the number of completed instances.
Metric Summary
The following table shows how often the metric's value is collected.
Response
Shows if the SOA server is available or not.
UpDown Status
This metric shows the current status of the SOA server. A value of 1 indicates the server is running. A value of 0 indicates the server is down.
Metric Summary
The following table shows how often the metric's value is collected and compared against the default thresholds. The 'Consecutive Number of Occurrences Preceding Notification' column indicates the consecutive number of times the comparison against thresholds should hold TRUE before an alert is generated.
SOA Infrastructure Bindings Rate Metric Table
Shows metrics of the SOA Bindings.
Active request throughput in the last 5 minutes
This metric shows the active request throughput in the last five minutes in the binding component.
Metric Summary
The following table shows how often the metric's value is collected.
Number of faults since server startup
This metric shows the number of faults in the binding component since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Average request processing time
This metric shows the average request processing time for the binding component.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of processed requests since server startup
This metric shows the total number of processed requests since server startup in the binding component.
Metric Summary
The following table shows how often the metric's value is collected.
SOA Composite Bindings/References Rate Metric
This category provides information about SOA composite bindings/references rate metrics.
Total number of faults since server start
This metric shows the total number of faults since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of faults in the last 5 minutes
This metric shows the throughput for faults in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
Average Incoming Messages Processing Time
This metric shows the average processing time for incoming messages.
Metric Summary
The following table shows how often the metric's value is collected.
Total completed incoming messages since server start
This metric shows total number of completed incoming messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Incoming messages throughput in the last 5 minutes
This metric shows the throughput for incoming messages in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
Total Incoming Messages Processing Time
This metric shows the total processing time for incoming messages.
Metric Summary
The following table shows how often the metric's value is collected.
Total Incoming Message processing time
This metric shows the total processing time for incoming message.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of incoming messages since server start
This metric shows the total number of incoming messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Incoming message throughput in the last 5 minutes
This metric shows the throughput for incoming messages in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
Average Outbound Messages Processing Time
This metric shows the average processing time for outbound messages.
Metric Summary
The following table shows how often the metric's value is collected.
Total completed outgoing messages since server start
This metric shows the total number of completed, outgoing messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Outbound messages throughput in the last 5 minutes
This metric shows the throughput for outbound messages in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
Total Outbound Messages Processing Time since server start
This metric shows the total processing time for outbound messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Total Outbound Message processing time
This metric shows the total processing time for outbound messages.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of outgoing messages since server start
This metric shows the total number of outgoing messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Outbound message events throughput in the last 5 minutes
This metric shows the throughout for outbound message events in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
BPEL Dispatcher Rate Metric Table
Displays throughput metrics related to the BPEL dispatcher.
Total number of messages processed per thread since server startup
This metric shows the total number of messages processed per thread in the BPEL dispatcher since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of total messages in the last 5 minutes
This metric shows the total message throughput in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of total message
This metric shows the last value of all messages in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of average thread allocation time in the last 5 minutes
This metric shows the throughput for the average thread allocation time in the last five minutes in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of average thread allocation time
This metric shows the last value of average thread allocation time in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of average thread lifetime in the last 5 minutes
This metric shows the throughput for the lifetime of the average thread in the last five minutes in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of average thread lifetime
This metric shows the last value for the lifetime of the average thread in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of maximum threads in the last 5 minutes
This metric shows the throughput for maximum threads in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of maximum thread
This metric shows the last value for the maximum thread in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of minimum threads in the last 5 minutes
This metric shows the throughput for minimum threads in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of minimum thread
This metric shows the last value for the minimum thread in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Number of active threads since server startup
This metric shows the number of active threads since server startup in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of thread count in the last 5 minutes
This metric shows the thread count throughput in the last five minutes in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of thread count
This metric shows the last thread count value in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Number of thread highs since server startup
This metric shows the number of high thread levels in the BPEL dispatcher since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of thread high in the last 5 minutes
This metric shows high levels of thread throughput in the last five minutes in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of thread high
This metric shows the last high value of the thread in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Number of pending threads since server startup
This metric shows the number of pending threads in the BPEL dispatcher since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of pending threads in the last 5 minutes
This metric shows the throughput for pending threads in the last five minutes in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of pending thread
This metric shows the last value of the pending thread in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of threads since server startup
This metric shows the total number of threads in the BPEL dispatcher since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of total threads in the last 5 minutes
This metric shows the throughput for all threads in the last five minutes in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of total thread metric
This metric shows the last value for the total thread metric in the BPEL dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
BPMN Dispatcher Rate Metric Table
Throughput of total messages in the last 5 minutes.
Last value of maximum thread
This metric shows the last value for the maximum thread in the BPMN dispatcher
Metric Summary
The following table shows how often the metric's value is collected.
Number of active threads since server startup
This metric shows the number of active threads since server startup in the BPMN dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of thread count in the last 5 minutes
This metric shows the thread count throughput in the last five minutes in the BPMN dispatcher.
Metric Summary
The following table shows how often the metric's value is collected.
SOA Mediator Engine Cache
This category provides information about SOA Mediator Engine Cache metrics.
Last value of metadata cache
This metric shows the last value of the metadata cache in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of transformation cache
This metric shows the last value of transformation cache in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
SOA Mediator Engine Requests
Callback Requests
This metric shows the callback requests in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Delay Requests
This metric shows the delayed requests in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Dequeue Requests
This metric shows the dequeued requests in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Timeout Requests
This metric shows the timed out requests in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
SOA Mediator Engine Request Breakdown Rate Metric Table
Displays the path taken by a request in the Mediator Service Engine and the time spent
enqueue-phase.active
This metric shows the active enqueued phases in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Avg Enqueue Time (ms)
This metric shows the average time spent on enqueuing in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Enqueued
This metric shows the completed enqueuing phases in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of Enqueue phase
This metric shows the throughput for enqueuing in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Total Enqueue Time (ms)
This metric shows the total enqueuing time in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
invoke-phase.active
This metric shows the active invocations in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Avg Invoke Time (ms)
This metric shows the average invocation time in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Invoked
This metric shows the completed invocations in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of Invoke phase
This metric shows the throughput for invocations in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Total Invoke Time (ms)
This metric shows the total invocation time in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
invokeOneway-phase.active
This metric shows the active one-way invocations in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Avg Oneway Invoke Processing Time (ms)
This metric shows the average processing time for one-way invocations in milliseconds in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Oneway Invocations
This metric shows the completed one-way invocations in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of Oneway Invocations
This metric shows the throughput for one-way invocations in the mediator service component.
Metric Summary
The following table shows how often the metric's value is collected.
Total Oneway Invocation Time (ms)
This metric shows the total time for one-way invocations in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
publish-phase.active
This metric shows the active publishing phases in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Avg Publication Time (ms)
This metric shows the average publication times in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Publications
This metric shows the completed publishing phases in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of Publication phase
This metric shows the throughput for publications in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Total Publication Time (ms)
This metric shows the total publication times in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
transformation-phase.active
This metric shows the active transformation phases in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Avg Transformation Time (ms)
This metric shows the average time for transformations in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Transformations
This metric shows the completed transformations in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of Transformations
This metric shows the throughput for transformations in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Total Transformation Time (ms)
This metric shows the total time for transformations in the mediator service engine.
Metric Summary
The following table shows how often the metric's value is collected.
SOA Infra Mesh
Displays the SOA server mesh metrics
Number of active messages in the mesh
This metric displays the number of active messages in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of messages in the mesh since server startup
This metric shows the total number of messages in the SOA server since startup.
Metric Summary
The following table shows how often the metric's value is collected.
Number of faulted messages in the mesh
This metric displays the number of faulted messages in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of messages in the mesh in the last 5 minutes
This metric displays the throughput for messages in the SOA server in the last 5 minutes.
Metric Summary
The following table shows how often the metric's value is collected.
SOA Infra Mesh Message Count Table
Total number of messages in the mesh since server startup
This metric shows the total number of messages in the service infrastructure since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Mesh Name
This metric shows service infrastructure performance.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of faulted asynchronous messages in the last 5 minutes
This metric shows the throughput for faulted asynchronous messages in the last five minutes in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Number of active asynchronous messages
This metric shows the number of active, asynchronous messages in the SOA server at this time.
Metric Summary
The following table shows how often the metric's value is collected.
Average processing time of asynchronous messages
This metric shows the average processing time for asynchronous messages in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Number of completed asynchronous messages
This metric shows the number of completed asynchronous messages in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of asynchronous messages in the last 5 minutes
This metric shows the throughput for asynchronous messages in the last five minutes in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Total processing time of asynchronous messages
This metric shows the total processing time for asynchronous messages in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of faulted synchronous messages in the last 5 minutes
This metric shows the throughput for faulted, synchronous messages in the last five minutes in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Number of active synchronous messages
This metric shows the number of active, synchronous messages in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Average processing time of synchronous messages
This metric shows the average processing time for synchronous messages in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Number of completed synchronous messages
This metric displays the number of completed, synchronous messages in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of synchronous messages in the last 5 minutes
This metric displays the throughput for synchronous messages in the last five minutes in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Total processing time of synchronous messages
This metric shows the total processing time for synchronous messages in the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
SOA Message Processing Rate Metric Table
Displays the metrics related to message processing in the service engines
Total number of active requests since server startup
This metric shows the total number of active requests since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of the active requests in the last 5 minutes
This metric shows message processing details in the service engines.
Metric Summary
The following table shows how often the metric's value is collected.
Last value of active request
This metric shows the last value of the active request.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of BPEL messages since startup
This metric shows the total number of BPEL messages since startup.
Metric Summary
The following table shows how often the metric's value is collected.
Engine Name
This metric shows the BPEL service engine name.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of decision service messages since startup
This metric shows the total number of decision service messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Engine Name
This metric shows the decision service engine name.
Metric Summary
The following table shows how often the metric's value is collected.
Number of faults since server startup
This metric shows the number of faults occurring since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of faulted requests in the last 5 minutes
This metric shows the throughput of faulted requests in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
Rate of processing faulted requests
This metric shows the processing rate for faulted requests.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of mediator messages since startup
This metric shows the total number of mediator messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Engine Name
This metric shows the mediator service engine name.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of messages since server startup
This metric shows the total number of messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of asynchronous requests since server startup
This metric shows the total number of asynchronous requests since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Throughput of asynchronous invocations in the last 5 minutes
This metric shows the throughput of asynchronous invocations in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
Rate of processing asynchronous invocations
This metric shows processing rate for asynchronous invocations.
Metric Summary
The following table shows how often the metric's value is collected.
Average asynchronous message processing time since server startup
This metric shows the average processing time for asynchronous messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of synchronous requests since server startup
This metric shows the total number of synchronous requests since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Synchronous invocations throughput in the last 5 minutes
This metric shows the throughput for synchronous invocations in the last five minutes.
Metric Summary
The following table shows how often the metric's value is collected.
Rate of processing synchronous invocations
This metric shows the processing rate for synchronous invocations.
Metric Summary
The following table shows how often the metric's value is collected.
Average synchronous message processing time since server startup
This metric shows the average processing time for synchronous messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Total number of workflow messages since startup
This metric shows the total number of human workflow messages since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Engine Name
This metric shows the human workflow service engine name.
Metric Summary
The following table shows how often the metric's value is collected.
Total Composite Instances
Shows the instance metrics of composites deployed on the SOA server
Total number of instances since server startup
This metric shows the total number of composite instances created since server startup. This count spans across composites deployed on the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Domain Name
This metric shows the instance metrics of composites deployed on the SOA server.
Metric Summary
The following table shows how often the metric's value is collected.
Workflow Request Breakdown Rate Metrics
Shows the various services used by the Workflow Service Engine and their usage metrics.
Number of invocations since server startup
This metric shows the total number of invocations in the human workflow service engine since server startup.
Metric Summary
The following table shows how often the metric's value is collected.
Service Name
This metric shows the name of the internal service used by the human workflow service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Number of active requests
This metric shows the number of active requests in the human workflow service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Average request processing time
This metric shows the average request processing time in the human workflow service engine.
Metric Summary
The following table shows how often the metric's value is collected.
Number of completed requests
This metric shows the total number of completed requests in the human workflow service engine.
Metric Summary
The following table shows how often the metric's value is collected.