For the latest stable version, please use Spring Boot 3.4.0!

Prometheus (prometheus)

The prometheus endpoint provides Spring Boot application’s metrics in the format required for scraping by a Prometheus server.

Retrieving All Metrics

To retrieve all metrics, make a GET request to /actuator/prometheus, as shown in the following curl-based example:

$ curl 'http://localhost:8080/actuator/prometheus' -i -X GET

The resulting response is similar to the following:

HTTP/1.1 200 OK
Content-Type: text/plain;version=0.0.4;charset=utf-8
Content-Length: 3096

# HELP jvm_buffer_count_buffers An estimate of the number of buffers in the pool
# TYPE jvm_buffer_count_buffers gauge
jvm_buffer_count_buffers{id="direct"} 16.0
jvm_buffer_count_buffers{id="mapped"} 0.0
jvm_buffer_count_buffers{id="mapped - 'non-volatile memory'"} 0.0
# HELP jvm_buffer_memory_used_bytes An estimate of the memory that the Java virtual machine is using for this buffer pool
# TYPE jvm_buffer_memory_used_bytes gauge
jvm_buffer_memory_used_bytes{id="direct"} 1.7043464E7
jvm_buffer_memory_used_bytes{id="mapped"} 0.0
jvm_buffer_memory_used_bytes{id="mapped - 'non-volatile memory'"} 0.0
# HELP jvm_buffer_total_capacity_bytes An estimate of the total capacity of the buffers in this pool
# TYPE jvm_buffer_total_capacity_bytes gauge
jvm_buffer_total_capacity_bytes{id="direct"} 1.7043463E7
jvm_buffer_total_capacity_bytes{id="mapped"} 0.0
jvm_buffer_total_capacity_bytes{id="mapped - 'non-volatile memory'"} 0.0
# HELP jvm_memory_committed_bytes The amount of memory in bytes that is committed for the Java virtual machine to use
# TYPE jvm_memory_committed_bytes gauge
jvm_memory_committed_bytes{area="heap",id="G1 Eden Space"} 4.0894464E7
jvm_memory_committed_bytes{area="heap",id="G1 Old Gen"} 1.08003328E8
jvm_memory_committed_bytes{area="heap",id="G1 Survivor Space"} 3145728.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 2555904.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4456448.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.0381696E7
jvm_memory_committed_bytes{area="nonheap",id="Compressed Class Space"} 1.2255232E7
jvm_memory_committed_bytes{area="nonheap",id="Metaspace"} 8.912896E7
# HELP jvm_memory_max_bytes The maximum amount of memory in bytes that can be used for memory management
# TYPE jvm_memory_max_bytes gauge
jvm_memory_max_bytes{area="heap",id="G1 Eden Space"} -1.0
jvm_memory_max_bytes{area="heap",id="G1 Old Gen"} 1.073741824E9
jvm_memory_max_bytes{area="heap",id="G1 Survivor Space"} -1.0
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 5836800.0
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 1.22912768E8
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 1.22908672E8
jvm_memory_max_bytes{area="nonheap",id="Compressed Class Space"} 1.073741824E9
jvm_memory_max_bytes{area="nonheap",id="Metaspace"} -1.0
# HELP jvm_memory_used_bytes The amount of used memory
# TYPE jvm_memory_used_bytes gauge
jvm_memory_used_bytes{area="heap",id="G1 Eden Space"} 1.3631488E7
jvm_memory_used_bytes{area="heap",id="G1 Old Gen"} 8.424704E7
jvm_memory_used_bytes{area="heap",id="G1 Survivor Space"} 3132880.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 1452672.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4450432.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.0339712E7
jvm_memory_used_bytes{area="nonheap",id="Compressed Class Space"} 1.1826536E7
jvm_memory_used_bytes{area="nonheap",id="Metaspace"} 8.829972E7

The default response content type is text/plain;version=0.0.4. The endpoint can also produce application/openmetrics-text;version=1.0.0 when called with an appropriate Accept header, as shown in the following curl-based example:

$ curl 'http://localhost:8080/actuator/prometheus' -i -X GET \
    -H 'Accept: application/openmetrics-text; version=1.0.0; charset=utf-8'

The resulting response is similar to the following:

HTTP/1.1 200 OK
Content-Type: application/openmetrics-text;version=1.0.0;charset=utf-8
Content-Length: 3102

# TYPE jvm_buffer_count_buffers gauge
# HELP jvm_buffer_count_buffers An estimate of the number of buffers in the pool
jvm_buffer_count_buffers{id="direct"} 16.0
jvm_buffer_count_buffers{id="mapped"} 0.0
jvm_buffer_count_buffers{id="mapped - 'non-volatile memory'"} 0.0
# TYPE jvm_buffer_memory_used_bytes gauge
# HELP jvm_buffer_memory_used_bytes An estimate of the memory that the Java virtual machine is using for this buffer pool
jvm_buffer_memory_used_bytes{id="direct"} 1.7043464E7
jvm_buffer_memory_used_bytes{id="mapped"} 0.0
jvm_buffer_memory_used_bytes{id="mapped - 'non-volatile memory'"} 0.0
# TYPE jvm_buffer_total_capacity_bytes gauge
# HELP jvm_buffer_total_capacity_bytes An estimate of the total capacity of the buffers in this pool
jvm_buffer_total_capacity_bytes{id="direct"} 1.7043463E7
jvm_buffer_total_capacity_bytes{id="mapped"} 0.0
jvm_buffer_total_capacity_bytes{id="mapped - 'non-volatile memory'"} 0.0
# TYPE jvm_memory_committed_bytes gauge
# HELP jvm_memory_committed_bytes The amount of memory in bytes that is committed for the Java virtual machine to use
jvm_memory_committed_bytes{area="heap",id="G1 Eden Space"} 4.0894464E7
jvm_memory_committed_bytes{area="heap",id="G1 Old Gen"} 1.08003328E8
jvm_memory_committed_bytes{area="heap",id="G1 Survivor Space"} 3145728.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 2555904.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4456448.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.031616E7
jvm_memory_committed_bytes{area="nonheap",id="Compressed Class Space"} 1.2255232E7
jvm_memory_committed_bytes{area="nonheap",id="Metaspace"} 8.912896E7
# TYPE jvm_memory_max_bytes gauge
# HELP jvm_memory_max_bytes The maximum amount of memory in bytes that can be used for memory management
jvm_memory_max_bytes{area="heap",id="G1 Eden Space"} -1.0
jvm_memory_max_bytes{area="heap",id="G1 Old Gen"} 1.073741824E9
jvm_memory_max_bytes{area="heap",id="G1 Survivor Space"} -1.0
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 5836800.0
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 1.22912768E8
jvm_memory_max_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 1.22908672E8
jvm_memory_max_bytes{area="nonheap",id="Compressed Class Space"} 1.073741824E9
jvm_memory_max_bytes{area="nonheap",id="Metaspace"} -1.0
# TYPE jvm_memory_used_bytes gauge
# HELP jvm_memory_used_bytes The amount of used memory
jvm_memory_used_bytes{area="heap",id="G1 Eden Space"} 1.1534336E7
jvm_memory_used_bytes{area="heap",id="G1 Old Gen"} 8.424704E7
jvm_memory_used_bytes{area="heap",id="G1 Survivor Space"} 3132880.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 1452672.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4439296.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.0292096E7
jvm_memory_used_bytes{area="nonheap",id="Compressed Class Space"} 1.1822616E7
jvm_memory_used_bytes{area="nonheap",id="Metaspace"} 8.8261424E7
# EOF

Query Parameters

The endpoint uses query parameters to limit the samples that it returns. The following table shows the supported query parameters:

Parameter Description

includedNames

Restricts the samples to those that match the names. Optional.

Retrieving Filtered Metrics

To retrieve metrics matching specific names, make a GET request to /actuator/prometheus with the includedNames query parameter, as shown in the following curl-based example:

$ curl 'http://localhost:8080/actuator/prometheus?includedNames=jvm_memory_used_bytes%2Cjvm_memory_committed_bytes' -i -X GET

The resulting response is similar to the following:

HTTP/1.1 200 OK
Content-Type: text/plain;version=0.0.4;charset=utf-8
Content-Length: 1459

# HELP jvm_memory_committed_bytes The amount of memory in bytes that is committed for the Java virtual machine to use
# TYPE jvm_memory_committed_bytes gauge
jvm_memory_committed_bytes{area="heap",id="G1 Eden Space"} 4.0894464E7
jvm_memory_committed_bytes{area="heap",id="G1 Old Gen"} 1.31072E8
jvm_memory_committed_bytes{area="heap",id="G1 Survivor Space"} 3145728.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 2555904.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4521984.0
jvm_memory_committed_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.0381696E7
jvm_memory_committed_bytes{area="nonheap",id="Compressed Class Space"} 1.2255232E7
jvm_memory_committed_bytes{area="nonheap",id="Metaspace"} 8.9194496E7
# HELP jvm_memory_used_bytes The amount of used memory
# TYPE jvm_memory_used_bytes gauge
jvm_memory_used_bytes{area="heap",id="G1 Eden Space"} 1.4680064E7
jvm_memory_used_bytes{area="heap",id="G1 Old Gen"} 8.424704E7
jvm_memory_used_bytes{area="heap",id="G1 Survivor Space"} 3132880.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-nmethods'"} 1452672.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'non-profiled nmethods'"} 4458880.0
jvm_memory_used_bytes{area="nonheap",id="CodeHeap 'profiled nmethods'"} 2.0370688E7
jvm_memory_used_bytes{area="nonheap",id="Compressed Class Space"} 1.1827136E7
jvm_memory_used_bytes{area="nonheap",id="Metaspace"} 8.8304008E7