Metrics

Once installed and enabled, the APM agents automatically start reporting key performance metrics about your application. These standard metrics are collected for all requests and include response time and error rate for the service as a whole, or for a particular transaction. AppOptics also provides a set of trace-derived metrics for various types of outbound calls made by your application, such as response time for database calls that can be filtered by database host or query operation. These trace-derived metrics are based on a sampled subset of requests to a service. In addition, several of the agents report language-specific runtime metrics about the execution environment of your application.

Standard Metrics

The tables below list the default set of metrics collected by the APM agent for all requests, as well as the tags available to the standard metrics. Counts are reported every minute.

Metric	Description	Available Tags
trace.service.errors	Service error count	service
trace.service.error_rate	Service error rate (%)	service
trace.service.host.errors	Host error count	service,status
trace.service.host.requests	Host request count	service,status
trace.service.host.response_time	Host response time	service,status
trace.service.hosts.count	Service host count	service
trace.service.http_method.requests	Service HTTP method count	service,method
trace.service.http_method.response_time	Service response time by HTTP method	service,method
trace.service.http_status.requests	Service HTTP status count	service,status
trace.service.http_status.response_time	Service response time by HTTP method	service,status
trace.service.requests	Service request count	service
trace.service.response_time	Service average response time	service
trace.service.response_time.p50	Service response time of the top 50%	service
trace.service.response_time.p95	Service response time of the top 95%	service
trace.service.response_time.p99	Service response time of the top 99%	service
trace.service.response_time.p999	Service response time of the top 99.9%	service
trace.service.samplecount	count of sampled requests	service,host_type
trace.service.tracecount	count of traces generated from requests	service,host_type
trace.service.transaction.errors	Transaction error count	service,transaction
trace.service.transaction.http_method.requests	Transaction HTTP method count	service,transaction,method
trace.service.transaction.http_status.requests	Transaction HTTP status count	service,transaction,status
trace.service.transaction.requests	Transaction request count	service,transaction
trace.service.transaction.response_time	Transaction average response time	service,transaction
trace.service.transaction.response_time.p50	Transaction response time of the top 50%	service,transaction
trace.service.transaction.response_time.p95	Transaction response time of the top 95%	service,transaction
trace.service.transaction.response_time.p99	Transaction response time of the top 99%	service,transaction

Tags

Tag Name	Description
host_type	The type of the host, which is either server-based (PERSISTENT) or AWS Lambda (AWS_LAMBDA).
method	HTTP request method
service	Name of the service
status	HTTP status code
transaction	Name of the transaction

Sampled Trace-Derived Metrics

Trace-derived metrics are additional metrics pulled from the traces gathered by the APM agent. These metrics are gathered using adaptive sampling; in low-traffic environments every request will be traced but in high-traffic environments a sampled subset of requests will be used. Unlike the standard metrics above, these are not guaranteed to reflect all activity in your applications. See Transaction Trace Sampling for more information.

When viewing data in AppOptics, filter by a service to show a sampled metric's data. If you do not filter by a service when viewing sampled trace-derived metrics, no data will be displayed.

• Database Metrics
• Cache Metrics
• Remote Service Metrics
• Exception Metrics
• Other Sampled Metrics

Database Metrics

Metric	Description
trace.service.outbound_calls.database.query.response_time_per_trace	Service database query average response time per trace
trace.service.outbound_calls.database.query.response_time	Service database query average response time
trace.service.outbound_calls.database.query.count_per_trace	Service database query average count per trace

Database Metric Tags

Tag Name	Description
service	Name of the service
transaction	Name of the transaction
database	Name of the database
database_host	The Database Host
query_op	Query operation
query_table	Database Table

Cache Metrics

Metric	Description
trace.service.outbound_calls.cache.op.response_time_per_trace	Service cache op average response time per trace
trace.service.outbound_calls.cache.op.response_time	Service cache op query average response time
trace.service.outbound_calls.cache.op.count_per_trace	Service cache op average count per trace
trace.service.outbound_calls.cache.op.hit_rate	Servce cache op average hit rate

Cache Metric Tags

Tag Name	Description
service	Name of the service
cache	Name of the cache
cache_host	The Cache Host
cache_op	Cache operation

Remote Service Metrics

Metric	Description
trace.service.outbound_calls.remote_service.call.response_time_per_trace	Service remote call average response time per trace
trace.service.outbound_calls.remote_service.call.response_time	Service remote call query average response time
trace.service.outbound_calls.remote_service.call.count_per_trace	Service remote call average count per trace

Remote Service Metric Tags

Tag Name	Description
service	Name of the service
remote_service	Name of the remote service
remote_service_type	Remotes service type
remote_service_op	Remote service operation

Exception Metrics

Metric	Description
trace.service.exceptions.count	Service exceptions count

Exception Metric Tags

Tag Name	Description
service	Name of the service
transaction	Name of the transaction
exception_class	Name of the Exception Class
exception_class_message_hash	A hash of the message
exception_class_message_backtrace_hash	A hash of the backtrace

Other Sampled Metrics

Metric	Description
trace.service.critical_path.response_time_per_trace	Service critical path average response time

Other Sampled Metric Tags

Tag Name	Description
service	Name of the service
host	Name of the host
transaction	Name of the transaction
layer_name	Name of the Layer
layer_type	The type of Layer

Runtime Metrics

Many of our agents also report language-specific runtime metrics, to provide you insight and monitoring on memory, CPU and other statistics about your application's execution environment. An example is using the JMX metrics reported by the Java agent to correlate between application performance and JVM metrics such as garbage collection, heap size, and thread count.

The agents report runtime metrics out-of-the-box; on detecting these metrics, AppOptics automatically creates a pre-configured dashboard in your account to help you easily monitor key metrics right away:

These runtime metrics are also available throughout the AppOptics system for you to use in custom charts and dashboards and alerts.

See the links below on the metrics for each language runtime and agent-specific configuration:

• Go (agent version 1.13.0 and up)
• Java (agent version 6.0.0 and up)
• Node.js (agent version 7.1.0 and up)

Runtime Metric Tags

Runtime metrics, regardless of agent, will have the following tags:

Tag Name	Description
hostname	Name of the host
service	Name of the service