List of Prometheus metrics

List of the SonarQube Server metrics exposed by Prometheus.

Exposing metrics

SonarQube exposes metrics through two distinct mechanisms:

Mechanism	Availability	Scraping instructions
Web API (/api/monitoring/metrics)	All deployments (bare metal, Docker, Kubernetes)	Direct HTTP GET, authenticated with system passcode or bearer token.
JMX Exporter Java agent	Kubernetes / OpenShift only	Prometheus scrapes a separate port configured by the Helm chart. See the ArtifactHub’s Monitoring section for SonarQube Server (Developer and Enterprise) and SonarQube Server Data Center edition for more

Metrics exposed by the Web API

These metrics are available on all deployment types: bare metal, Docker, Kubernetes using GET /api/monitoring/metrics.

Metric name	Type	Unit	Description
sonarqube_compute_engine_pending_tasks_total	gauge	tasks	Number of tasks pending in the Compute Engine queue at a given point in time. Shared value across all SonarQube instances.
sonarqube_compute_engine_tasks_running_duration_seconds	summary	seconds	Compute Engine task running time in seconds. Labels: task_type, project_key
sonarqube_compute_engine_system_tasks_running_duration_seconds	summary	seconds	Compute Engine system task running time in seconds. Label: task_type
sonarqube_elasticsearch_disk_space_free_bytes	gauge	bytes	Space left on device. Label: node_name
sonarqube_elasticsearch_disk_space_total_bytes	gauge	bytes	Total disk space on the device. Label: node_name
sonarqube_health_compute_engine_status	gauge	N/A	Tells whether Compute Engine is up (healthy, ready to take tasks) or down. 1 for up, 0 for down.
sonarqube_health_elasticsearch_status	gauge	N/A	Tells whether Elasticsearch is up or down. 1 for up, 0 for down.
sonarqube_elasticsearch_read_only_indices_total	gauge	N/A	Number of indices in read-only mode due to disk space issues (Added in SonarQube Server 2026.3 and SonarQube Community Build 26.4).
sonarqube_elasticsearch_disk_usage_percent	gauge	percent	Maximum disk usage percentage across all Elasticsearch nodes (Added in SonarQube Server 2026.3 and SonarQube Community Build 26.4).
sonarqube_health_integration_azuredevops_status	gauge	N/A	Tells whether SonarQube has configured Azure DevOps integration and its status is green. 1 for green, 0 otherwise.
sonarqube_health_integration_bitbucket_status	gauge	N/A	Tells whether SonarQube has configured Bitbucket integration and its status is green. 1 for green, 0 otherwise.
sonarqube_health_integration_github_status	gauge	N/A	Tells whether SonarQube has configured GitHub integration and its status is green. 1 for green, 0 otherwise.
sonarqube_health_integration_gitlab_status	gauge	N/A	Tells whether SonarQube has configured GitLab integration and its status is green. 1 for green, 0 otherwise.
sonarqube_health_web_status	gauge	N/A	Tells whether the Web process is up or down. 1 for up, 0 for down.
sonarqube_license_days_before_expiration_total	gauge	days	Days until the SonarQube license will expire.
sonarqube_license_number_of_lines_analyzed_total	gauge	lines	Number of lines analyzed.
sonarqube_license_number_of_lines_remaining_total	gauge	lines	Number of lines remaining until the current license limit is reached.
sonarqube_number_of_connected_sonarlint_clients	gauge	clients	Number of connected SonarQube for IDE clients.
sonarqube_web_uptime_minutes	gauge	minutes	Number of minutes the SonarQube instance has been running.

JMX metrics (Kubernetes and OpenShift only)

The following metrics require the Prometheus JMX Exporter Java agent, which is configured automatically by the SonarQube Helm chart and attached to both the Web and Compute Engine JVM processes. On Kubernetes and OpenShift, the SonarQube Helm chart configures this automatically when:

• prometheusExporter.enabled: true (sonarqube Helm chart), or
• applicationNodes.prometheusExporter.enabled: true (sonarqube-dce Helm chart)

For non-Kubernetes deployment and JMX metrics, see Monitoring SonarQube Server instance.

Enabling metrics collection on Kubernetes

See Introduction to setting up monitoring for enabling metrics collection.

Prometheus scrapes metrics from dedicated ports, which are defined and configurable within the Helm chart.

Component type	Web	Compute Engine
Default Port	8000	8001
SonarQube Helm Chart Key	prometheusExporter.webBeanPort	prometheusExporter.ceBeanPort
SonarQube DCE Helm Chart Key	applicationNodes.prometheusExporter.webBeanPort	applicationNodes.prometheusExporter.ceBeanPort

See the ArtifactHub’s Monitoring section for SonarQube Server (Developer and Enterprise) and SonarQube Server Data Center edition for more details.

Web server: database connection pool

JMX object: SonarQube:name=Database

Metric name	Type	Unit	Description
SonarQube_Database_PoolActiveConnections	Untyped	Connections	Number of active connections in the database pool.
SonarQube_Database_PoolIdleConnections	Untyped	Connections	Number of idle connections in the database pool.
SonarQube_Database_PoolMaxConnections	Untyped	Connections	Maximum number of connections to the database pool.
SonarQube_Database_PoolMaxLifeTimeMillis	Untyped	Milliseconds	Maximum time a connection can stay alive in the database pool.
SonarQube_Database_PoolMaxWaitMillis	Untyped	Milliseconds	Maximum time a connection can keep waiting in the database pool.
SonarQube_Database_PoolMinIdleConnections	Untyped	Connections	Minimum number of idle connections in the database pool.
SonarQube_Database_PoolTotalConnections	Untyped	Connections	Total number of connections to the database pool.

Web server: async execution

JMX object: SonarQube:name=AsyncExecution

Metric name	Type	Unit	Description
SonarQube_AsyncExecution_LargestWorkerCount	Untyped	Workers	Maximum number of asynchronous workers seen since startup.
SonarQube_AsyncExecution_QueueSize	Untyped	N/A	Current queue size for asynchronous jobs.
SonarQube_AsyncExecution_WorkerCount	Untyped	Workers	Current number of asynchronous job workers.

SonarQube Compute Engine and Web JVM process metrics

The following metrics are standard JVM process metrics emitted by the JMX Prometheus Java agent itself (not SonarQube-specific MBeans). Because the agent runs inside both the Web and CE JVM processes, these metrics are available from both scrape targets:

• Port 8000 (monitoring-web): values reflect the Web server JVM process
• Port 8001 (monitoring-ce): values reflect the Compute Engine (CE) JVM process

Use the instance or port label in Prometheus to distinguish between the two when building dashboards or alerts.

Metric name	Type	Unit	Description
process_cpu_seconds_total	Counter	Seconds	Total user and system CPU time
process_max_fds	Gauge	N/A	Maximum number of open file descriptors.
process_open_fds	Gauge	N/A	Number of open file descriptors.
process_resident_memory_bytes	Gauge	Bytes	Resident memory size in bytes.
process_start_time_seconds	Gauge	Seconds	Start time of the process since Unix epoch in seconds.
process_virtual_memory_bytes	Gauge	Bytes	Virtual memory size in bytes .

SonarQube Compute Engine database connection pool

JMX object: SonarQube:name=ComputeEngineDatabaseConnection

Metric name	Type	Unit	Description
SonarQube_ComputeEngineDatabaseConnection_PoolActiveConnections	Untyped	Connections	Number of active connections in the Compute Engine database pool.
SonarQube_ComputeEngineDatabaseConnection_PoolIdleConnections	Untyped	Connections	Number of idle connections in the Compute Engine database pool.
SonarQube_ComputeEngineDatabaseConnection_PoolMaxConnections	Untyped	Connections	Maximum number of connections to the Compute Engine database pool.
SonarQube_ComputeEngineDatabaseConnection_PoolMaxLifeTimeMillis	Untyped	Milliseconds	Maximum time a connection can stay alive in the Compute Engine database pool.
SonarQube_ComputeEngineDatabaseConnection_PoolMaxWaitMillis	Untyped	Milliseconds	Maximum time a connection can keep waiting in the Compute Engine database pool.
SonarQube_ComputeEngineDatabaseConnection_PoolMinIdleConnections	Untyped	Connections	Minimum number of idle connections in the Compute Engine database pool.
SonarQube_ComputeEngineDatabaseConnection_PoolTotalConnections	Untyped	Connections	Total number of connections to the Compute Engine database pool.

SonarQube Compute Engine tasks

JMX object: SonarQube:name=ComputeEngineTasks

Metric name	Type	Unit	Description
SonarQube_ComputeEngineTasks_ErrorCount	Untyped	Tasks	Number of Compute Engine tasks whose processing ended with an error since instance startup.
SonarQube_ComputeEngineTasks_InProgressCount	Untyped	Tasks	Number of Compute Engine tasks currently being processed.
SonarQube_ComputeEngineTasks_LongestTimePending	Untyped	Milliseconds	Age in milliseconds of the oldest pending task.
SonarQube_ComputeEngineTasks_PendingCount	Untyped	Tasks	Number of pending Compute Engine tasks, including tasks received before instance startup.
SonarQube_ComputeEngineTasks_ProcessingTime	Untyped	Milliseconds	Total time spent processing Compute Engine tasks since instance startup.
SonarQube_ComputeEngineTasks_SuccessCount	Untyped	Tasks	Number of Compute Engine tasks whose processing ended successfully since instance startup.
SonarQube_ComputeEngineTasks_WorkerCount	Untyped	Workers	Configured number of Compute Engine workers.
SonarQube_ComputeEngineTasks_WorkerMaxCount	Untyped	Workers	Configured maximum number of Compute Engine workers.

Tomcat

The following metrics come from Tomcat, they are all untyped.

Connector

Metric name	Description
Tomcat_Connector_portOffset	The offset that will be applied to the port to determine the actual port number used.
Tomcat_Connector_maxThreads	The maximum number of request processing threads to be created for the internal Executor. -1 indicates an external Executor is being used.
Tomcat_Connector_tcpNoDelay	Should we use TCP no delay?
Tomcat_Connector_maxParameterCount	The maximum number of parameters (GET plus POST) that will be automatically parsed by the container. 10000 by default. The default Tomcat server.xml configures a lower default of 1000. A value of less than 0 means no limit.
Tomcat_Connector_maxHeaderCount	The maximum number of headers that are allowed by the container. 100 by default. A value of less than 0 means no limit.
Tomcat_Connector_maxKeepAliveRequests	Maximum number of Keep-Alive requests to honor per connection.
Tomcat_Connector_allowTrace	Allow disabling TRACE method.
Tomcat_Connector_enableLookups	The ‘enable DNS lookups’ flag for this Connector.
Tomcat_Connector_localPort	The port number on which this connector is listening to requests. If the special value for port of zero is used then this method will report the actual port bound.
Tomcat_Connector_threadPriority	The thread priority for processors using the internal Executor. -1 indicates an external Executor is being used.
Tomcat_Connector_processorCache	The processor cache size.
Tomcat_Connector_xpoweredBy	Is generation of X-Powered-By response header enabled/disabled?
Tomcat_Connector_useIPVHosts	Should IP-based virtual hosting be used?
Tomcat_Connector_port	The port number (excluding any offset) on which this connector is configured to listen for requests. The special value of 0 means select a random free port when the socket is bound.
Tomcat_Connector_redirectPort	The redirect port (excluding any offset) for non-SSL to SSL redirects.
Tomcat_Connector_proxyPort	The Server port to which we should pretend requests to this Connector.
Tomcat_Connector_acceptCount	The accept count for this Connector.
Tomcat_Connector_maxSwallowSize	The maximum number of request body bytes to be swallowed by Tomcat for an aborted upload.
Tomcat_Connector_portWithOffset	The actual port number (including any offset) on which this connector is configured to listen for requests.
Tomcat_Connector_maxPostSize	Maximum size in bytes of a POST which will be handled by the servlet API provided features.
Tomcat_Connector_connectionTimeout	Timeout value on the incoming connection.
Tomcat_Connector_connectionLinger	Linger value on the incoming connection.

Engine

Metric name	Description
Tomcat_Engine_backgroundProcessorDelay	The processor delay for this component.
Tomcat_Engine_startChildren	Will children be started automatically when they are added?
Tomcat_Engine_startStopThreads	The number of threads to use when starting and stopping child Hosts.

GlobalRequestProcessor

Metric name	Description
Tomcat_GlobalRequestProcessor_bytesReceived	Amount of data received, in bytes.
Tomcat_GlobalRequestProcessor_bytesSent	Amount of data sent, in bytes.
Tomcat_GlobalRequestProcessor_errorCount	Number of errors for the GlobalRequestProcessor.
Tomcat_GlobalRequestProcessor_maxTime	Maximum time to process a request.
Tomcat_GlobalRequestProcessor_processingTime	Total time to process the requests.
Tomcat_GlobalRequestProcessor_requestCount	Number of requests processed for the GlobalRequestProcessor.

Host

Metric name	Description
Tomcat_Host_autoDeploy	The auto deploy flag for this Host.
Tomcat_Host_backgroundProcessorDelay	The processor delay for this component.
Tomcat_Host_copyXML	Should XML files be copied to $CATALINA_BASE/conf/{engine}/{host} by default when a web application is deployed?
Tomcat_Host_createDirs	Should we create directories upon startup for appBase and xmlBase?
Tomcat_Host_deployOnStartup	The deploy on startup flag for this Host.
Tomcat_Host_deployXML	Deploy Context XML config files property.
Tomcat_Host_startChildren	Will children be started automatically when they are added?
Tomcat_Host_startStopThreads	The number of threads to use when starting, stopping, and deploying child Contexts.
Tomcat_Host_undeployOldVersions	Determines if old versions of applications deployed using parallel deployment are automatically undeployed when no longer used. Requires autoDeploy to be enabled.
Tomcat_Host_unpackWARs	Unpack WARs property.

Manager

Metric name	Description
Tomcat_Manager_activeSessions	Number of active sessions at this moment.
Tomcat_Manager_duplicates	Number of duplicated session ids generated.
Tomcat_Manager_expiredSessions	Number of sessions that expired (doesn’t include explicit invalidations).
Tomcat_Manager_maxActive	Maximum number of active sessions so far.
Tomcat_Manager_maxActiveSessions	The maximum number of active Sessions allowed, or -1 for no limit.
Tomcat_Manager_persistAuthentication	Indicates whether sessions shall persist authentication information when being persisted (e.g. across application restarts).
Tomcat_Manager_processExpiresFrequency	The frequency of the manager checks (expiration and passivation).
Tomcat_Manager_processingTime	Time spent doing housekeeping and expiration.
Tomcat_Manager_rejectedSessions	Number of sessions we rejected due to maxActive being reached.
Tomcat_Manager_sessionAverageAliveTime	Average time an expired session had been alive.
Tomcat_Manager_sessionCounter	Total number of sessions created by this manager.
Tomcat_Manager_sessionCreateRate	Session creation rate in sessions per minute.
Tomcat_Manager_sessionExpireRate	Session expiration rate in sessions per minute.
Tomcat_Manager_sessionMaxAliveTime	Longest time an expired session had been alive.
Tomcat_Manager_warnOnSessionAttributeFilterFailure	Should a WARN level log message be generated if a session attribute fails to match sessionAttributeNameFilter or sessionAttributeClassNameFilter?

ProtocolHandler

Metric name	Description
Tomcat_ProtocolHandler_acceptCount	Introspected attribute acceptCount.
Tomcat_ProtocolHandler_acceptorThreadCount	Introspected attribute acceptorThreadCount.
Tomcat_ProtocolHandler_acceptorThreadPriority	Introspected attribute acceptorThreadPriority.
Tomcat_ProtocolHandler_allowHostHeaderMismatch	Introspected attribute allowHostHeaderMismatch.
Tomcat_ProtocolHandler_aprRequired	Introspected attribute aprRequired.
Tomcat_ProtocolHandler_compressionMinSize	Introspected attribute compressionMinSize.
Tomcat_ProtocolHandler_connectionCount	Introspected attribute connectionCount.
Tomcat_ProtocolHandler_connectionLinger	Introspected attribute connectionLinger.
Tomcat_ProtocolHandler_connectionTimeout	Introspected attribute connectionTimeout.
Tomcat_ProtocolHandler_connectionUploadTimeout	Introspected attribute connectionUploadTimeout.
Tomcat_ProtocolHandler_desiredBufferSize	Introspected attribute desiredBufferSize.
Tomcat_ProtocolHandler_disableUploadTimeout	Introspected attribute disableUploadTimeout.
Tomcat_ProtocolHandler_keepAliveTimeout	Introspected attribute keepAliveTimeout.
Tomcat_ProtocolHandler_localPort	Introspected attribute localPort.
Tomcat_ProtocolHandler_maxConnections	Introspected attribute maxConnections.
Tomcat_ProtocolHandler_maxExtensionSize	Introspected attribute maxExtensionSize.
Tomcat_ProtocolHandler_maxHeaderCount	Introspected attribute maxHeaderCount.
Tomcat_ProtocolHandler_maxHttpHeaderSize	Introspected attribute maxHttpHeaderSize.
Tomcat_ProtocolHandler_maxHttpRequestHeaderSize	Introspected attribute maxHttpRequestHeaderSize.
Tomcat_ProtocolHandler_maxHttpResponseHeaderSize	Introspected attribute maxHttpResponseHeaderSize.
Tomcat_ProtocolHandler_maxKeepAliveRequests	Introspected attribute maxKeepAliveRequests.
Tomcat_ProtocolHandler_maxSavePostSize	Introspected attribute maxSavePostSize.
Tomcat_ProtocolHandler_maxSwallowSize	Introspected attribute maxSwallowSize.
Tomcat_ProtocolHandler_maxThreads	Introspected attribute maxThreads.
Tomcat*_ProtocolHandler_*maxTrailerSize	Introspected attribute maxTrailerSize.
Tomcat_ProtocolHandler_minSpareThreads	Introspected attribute minSpareThreads.
Tomcat_ProtocolHandler_nameIndex	Introspected attribute nameIndex.
Tomcat_ProtocolHandler_noCompressionStrongETag	Introspected attribute noCompressionStrongETag.
Tomcat_ProtocolHandler_paused	Introspected attribute paused.
Tomcat_ProtocolHandler_pollerThreadCount	Introspected attribute pollerThreadCount.
Tomcat_ProtocolHandler_pollerThreadPriority	Introspected attribute pollerThreadPriority.
Tomcat_ProtocolHandler_port	Introspected attribute port.
Tomcat_ProtocolHandler_portOffset	Introspected attribute portOffset.
Tomcat_ProtocolHandler_portWithOffset	Introspected attribute portWithOffset.
Tomcat_ProtocolHandler_processorCache	Introspected attribute processorCache.
Tomcat_ProtocolHandler_rejectIllegalHeader	Introspected attribute rejectIllegalHeader.
Tomcat_ProtocolHandler_rejectIllegalHeaderName	Introspected attribute rejectIllegalHeaderName.
Tomcat_ProtocolHandler_secure	Introspected attribute secure.
Tomcat_ProtocolHandler_selectorTimeout	Introspected attribute selectorTimeout.
Tomcat_ProtocolHandler_sendfileSupported	Introspected attribute sendfileSupported.
Tomcat_ProtocolHandler_serverRemoveAppProvidedValues	Introspected attribute serverRemoveAppProvidedValues.
Tomcat_ProtocolHandler_sessionCacheSize	Introspected attribute sessionCacheSize.
Tomcat_ProtocolHandler_sessionTimeout	Introspected attribute sessionTimeout.
Tomcat_ProtocolHandler_sniParseLimit	Introspected attribute sniParseLimit.
Tomcat_ProtocolHandler_sSLDisableCompression	Introspected attribute sSLDisableCompression.
Tomcat_ProtocolHandler_sSLDisableSessionTickets	Introspected attribute sSLDisableSessionTickets.
Tomcat_ProtocolHandler_sSLEnabled	Introspected attribute sSLEnabled.
Tomcat_ProtocolHandler_sSLHonorCipherOrder	Introspected attribute sSLHonorCipherOrder.
Tomcat_ProtocolHandler_sSLVerifyDepth	Introspected attribute sSLVerifyDepth.
Tomcat_ProtocolHandler_tcpNoDelay	Introspected attribute tcpNoDelay.
Tomcat_ProtocolHandler_threadPriority	Introspected attribute threadPriority.
Tomcat_ProtocolHandler_trustMaxCertLength	Introspected attribute trustMaxCertLength.
Tomcat_ProtocolHandler_useKeepAliveResponseHeader	Introspected attribute useKeepAliveResponseHeader.
Tomcat_ProtocolHandler_useSendfile	Introspected attribute useSendfile.
Tomcat_ProtocolHandler_useServerCipherSuitesOrder	Introspected attribute useServerCipherSuitesOrder.
Tomcat_ProtocolHandler_waitingProcessorCount	Introspected attribute waitingProcessorCount.

Realm

Metric name	Description
Tomcat_Realm_available	Introspected attribute available.
Tomcat_Realm_stripRealmForGss	Introspected attribute stripRealmForGss.
Tomcat_Realm_throwOnFailure	Introspected attribute throwOnFailure.
Tomcat_Realm_transportGuaranteeRedirectStatus	Introspected attribute transportGuaranteeRedirectStatus.
Tomcat_Realm_validate	Introspected attribute validate.

RequestProcessor

Metric name	Description
Tomcat_RequestProcessor_bytesReceived	Introspected attribute bytesReceived.
Tomcat_RequestProcessor_bytesSent	Introspected attribute bytesSent.
Tomcat_RequestProcessor_contentLength	Introspected attribute contentLength.
Tomcat_RequestProcessor_errorCount	Introspected attribute errorCount.
Tomcat_RequestProcessor_lastRequestProcessingTime	Introspected attribute lastRequestProcessingTime.
Tomcat_RequestProcessor_maxTime	Introspected attribute maxTime.
Tomcat_RequestProcessor_processingTime	Introspected attribute processingTime.
Tomcat_RequestProcessor_requestBytesReceived	Introspected attribute requestBytesReceived.
Tomcat_RequestProcessor_requestBytesSent	Introspected attribute requestBytesSent.
Tomcat_RequestProcessor_requestCount	Introspected attribute requestCount.
Tomcat_RequestProcessor_requestProcessingTime	Introspected attribute requestProcessingTime.
Tomcat_RequestProcessor_serverPort	Introspected attribute serverPort.
Tomcat_RequestProcessor_stage	Introspected attribute stage.

Server

Metric name	Description
Tomcat_Server_port	TCP port (excluding any offset) for shutdown messages.
Tomcat_Server_portOffset	The offset applied to port and to the port attributes of any nested connectors.
Tomcat_Server_portWithOffset	Actual TCP port (including any offset) for shutdown messages.

Servlet

Metric name	Description
Tomcat_Servlet_available	The date and time at which this servlet will become available (in milliseconds since the epoch), or zero if the servlet is available. If this value equals Long.MAX_VALUE, the unavailability of this servlet is considered permanent.
Tomcat_Servlet_asyncSupported	Async support.
Tomcat_Servlet_backgroundProcessorDelay	The processor delay for this component.
Tomcat_Servlet_classLoadTime	Time taken to load the Servlet class.
Tomcat_Servlet_countAllocated	The count of allocations that are currently active (even if they are for the same instance, as will be true on a non-STM servlet).
Tomcat_Servlet_errorCount	Error count.
Tomcat_Servlet_loadOnStartup	The load-on-startup order value (negative value means load on first call) for this servlet.
Tomcat_Servlet_loadTime	Time taken to load and initialize the Servlet.
Tomcat_Servlet_maxInstances	Deprecated. Will be removed in Tomcat 10.1 onwards. Maximum number of STM instances.
Tomcat_Servlet_maxTime	Maximum processing time of a request.
Tomcat_Servlet_minTime	Minimum processing time of a request.
Tomcat_Servlet_processingTime	Total execution time of the servlet’s service method.
Tomcat_Servlet_requestCount	Number of requests processed by this wrapper.
Tomcat_Servlet_singleThreadModel	Deprecated. Will be removed in Tomcat 10.1 onwards. Does this servlet implement the SingleThreadModel interface?

SSLHostConfig

Metric name	Description
Tomcat_SSLHostConfig_certificateVerificationDepth	Introspected attribute certificateVerificationDepth.
Tomcat_SSLHostConfig_certificateVerificationDepthConfigured	Introspected attribute certificateVerificationDepthConfigured.
Tomcat_SSLHostConfig_disableCompression	Introspected attribute disableCompression.
Tomcat_SSLHostConfig_disableSessionTickets	Introspected attribute disableSessionTickets.
Tomcat_SSLHostConfig_honorCipherOrder	Introspected attribute honorCipherOrder.
Tomcat_SSLHostConfig_insecureRenegotiation	Introspected attribute insecureRenegotiation.
Tomcat_SSLHostConfig_openSslConfContext	Introspected attribute openSslConfContext.
Tomcat_SSLHostConfig_openSslContext	Introspected attribute openSslContext.
Tomcat_SSLHostConfig_revocationEnabled	Introspected attribute revocationEnabled.
Tomcat_SSLHostConfig_sessionCacheSize	Introspected attribute sessionCacheSize.
Tomcat_SSLHostConfig_sessionTimeout	Introspected attribute sessionTimeout.
Tomcat_SSLHostConfig_tls13RenegotiationAvailable	Introspected attribute tls13RenegotiationAvailable.

SocketProperties

Metric name	Description
Tomcat_SocketProperties_appReadBufSize	Introspected attribute appReadBufSize.
Tomcat_SocketProperties_appWriteBufSize	Introspected attribute appWriteBufSize.
Tomcat_SocketProperties_bufferPool	Introspected attribute bufferPool.
Tomcat_SocketProperties_bufferPoolSize	Introspected attribute bufferPoolSize.
Tomcat_SocketProperties_directBuffer	Introspected attribute directBuffer.
Tomcat_SocketProperties_directBufferPool	Introspected attribute directBufferPool.
Tomcat_SocketProperties_directSslBuffer	Introspected attribute directSslBuffer.
Tomcat_SocketProperties_eventCache	Introspected attribute eventCache.
Tomcat_SocketProperties_processorCache	Introspected attribute processorCache.
Tomcat_SocketProperties_soLingerOn	Introspected attribute soLingerOn.
Tomcat_SocketProperties_soLingerTime	Introspected attribute soLingerTime.
Tomcat_SocketProperties_soReuseAddress	Introspected attribute soReuseAddress.
Tomcat_SocketProperties_soTimeout	Introspected attribute soTimeout.
Tomcat_SocketProperties_tcpNoDelay	Introspected attribute tcpNoDelay.
Tomcat_SocketProperties_timeoutInterval	Introspected attribute timeoutInterval.
Tomcat_SocketProperties_unlockTimeout	Introspected attribute unlockTimeout.

StringCache

Metric name	Description
Tomcat_StringCache_accessCount	Introspected attribute accessCount.
Tomcat_StringCache_byteEnabled	Introspected attribute byteEnabled.
Tomcat_StringCache_cacheSize	Introspected attribute cacheSize.
Tomcat_StringCache_charEnabled	Introspected attribute charEnabled.
Tomcat_StringCache_hitCount	Introspected attribute hitCount.
Tomcat_StringCache_trainThreshold	Introspected attribute trainThreshold.

ThreadPool

Metric name	Description
Tomcat_ThreadPool_acceptCount	Tomcat ThreadPool acceptCount.
Tomcat_ThreadPool_acceptorThreadCount	Tomcat ThreadPool acceptorThreadCount.
Tomcat_ThreadPool_acceptorThreadPriority	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=acceptorThreadPriority
Tomcat_ThreadPool_alpnSupported	Tomcat ThreadPool alpnSupported.
Tomcat_ThreadPool_bindOnInit	Tomcat ThreadPool bindOnInit.
Tomcat_ThreadPool_connectionCount	Tomcat ThreadPool connectionCount.
Tomcat_ThreadPool_connectionLinger	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=connectionLinger
Tomcat_ThreadPool_connectionTimeout	Tomcat ThreadPool connection timeout.
Tomcat_ThreadPool_currentThreadCount	Tomcat ThreadPool currentThreadCount.
Tomcat_ThreadPool_currentThreadsBusy	The number of currently busy threads in the ThreadPool.
Tomcat_ThreadPool_daemon	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=daemon
Tomcat_ThreadPool_deferAccept	Tomcat ThreadPool deferAccept.
Tomcat_ThreadPool_executorTerminationTimeoutMillis	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=executorTerminationTimeoutMillis
Tomcat_ThreadPool_keepAliveCount	Tomcat ThreadPool keepAliveCount.
Tomcat_ThreadPool_keepAliveTimeout	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=keepAliveTimeout
Tomcat_ThreadPool_localPort	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=localPort
Tomcat_ThreadPool_maxConnections	Tomcat ThreadPool maxConnections.
Tomcat_ThreadPool_maxKeepAliveRequests	Tomcat ThreadPool maxKeepAliveRequests.
Tomcat_ThreadPool_maxThreads	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=maxThreads
Tomcat_ThreadPool_minSpareThreads	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=minSpareThreads
Tomcat_ThreadPool_paused	Tomcat ThreadPool paused.
Tomcat_ThreadPool_pollerThreadCount	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=pollerThreadCount
Tomcat_ThreadPool_pollerThreadPriority	Tomcat ThreadPool pollerThreadPriority.
Tomcat_ThreadPool_port	Tomcat ThreadPool port.
Tomcat_ThreadPool_portOffset	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=portOffset
Tomcat_ThreadPool_portWithOffset	Tomcat ThreadPool portWithOffset.
Tomcat_ThreadPool_running	Tomcat ThreadPool running.
Tomcat_ThreadPool_selectorTimeout	Introspected attribute selectorTimeout.
Tomcat_ThreadPool_sniParseLimit	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=sniParseLimit
Tomcat_ThreadPool_sSLEnabled	Tomcat ThreadPool sSLEnabled.
Tomcat_ThreadPool_tcpNoDelay	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=tcpNoDelay
Tomcat_ThreadPool_threadPriority	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=threadPriority
Tomcat_ThreadPool_useInheritedChannel	Tomcat ThreadPool useInheritedChannel.
Tomcat_ThreadPool_useSendfile	Tomcat:name="http-nio-0.0.0.0-9000",type=ThreadPool,attribute=useSendfile

UtilityExecutor

Metric name	Description
Tomcat_UtilityExecutor_activeCount	Introspected attribute activeCount.
Tomcat_UtilityExecutor_completedTaskCount	Introspected attribute completedTaskCount.
Tomcat_UtilityExecutor_continueExistingPeriodicTasksAfterShutdownPolicy	Introspected attribute continueExistingPeriodicTasksAfterShutdownPolicy.
Tomcat_UtilityExecutor_corePoolSize	Introspected attribute corePoolSize.
Tomcat_UtilityExecutor_executeExistingDelayedTasksAfterShutdownPolicy	Introspected attribute executeExistingDelayedTasksAfterShutdownPolicy.
Tomcat_UtilityExecutor_largestPoolSize	Introspected attribute largestPoolSize.
Tomcat_UtilityExecutor_maximumPoolSize	Introspected attribute maximumPoolSize.
Tomcat_UtilityExecutor_poolSize	Introspected attribute poolSize.
Tomcat_UtilityExecutor_removeOnCancelPolicy	Introspected attribute removeOnCancelPolicy.
Tomcat_UtilityExecutor_shutdown	Introspected attribute shutdown.
Tomcat_UtilityExecutor_taskCount	Introspected attribute taskCount.
Tomcat_UtilityExecutor_terminated	Introspected attribute terminated.
Tomcat_UtilityExecutor_terminating	Introspected attribute terminating.

Valve

Metric name	Description
Tomcat_Valve_asyncSupported	Does this valve support async reporting?
Tomcat_Valve_birthTime	Introspected attribute birthTime.
Tomcat_Valve_cache	Should we cache authenticated Principals if the request is part of an HTTP session?
Tomcat_Valve_changeSessionIdOnAuthentication	Controls if the session ID is changed if a session exists at the point where users are authenticated.
Tomcat_Valve_disableProxyCaching	Controls the caching of pages that are protected by security constraints.
Tomcat_Valve_quiet	Introspected attribute quiet.
Tomcat_Valve_securePagesWithPragma	Controls the caching of pages that are protected by security constraints.
Tomcat_Valve_showReport	Enables/Disables full error reports.
Tomcat_Valve_showServerInfo	Enables/Disables server info on error pages.
Tomcat_Valve_started	Introspected attribute started.
Tomcat_Valve_throwOnFailure	Introspected attribute throwOnFailure.

WebModule

Metric name	Description
Tomcat_WebModule_antiResourceLocking	Take care not to lock resources.
Tomcat_WebModule_clearReferencesRmiTargets	Should Tomcat look for memory leaks in RMI Targets and clear them if found as a workaround for application coding errors?
Tomcat_WebModule_clearReferencesStopTimerThreads	Should Tomcat attempt to terminate TimerThreads that have been started by the web application? Advisable to be used only in a development environment.
Tomcat_WebModule_clearReferencesStopThreads	Should Tomcat attempt to terminate threads that have been started by the web application? Advisable to be used only in a development environment.
Tomcat_WebModule_clearReferencesThreadLocals	Should Tomcat attempt to clear ThreadLocal variables that have been populated with classes loaded by the web application?
Tomcat_WebModule_configured	The correctly configured flag for this Context.
Tomcat_WebModule_cookies	Should we attempt to use cookies for session id communication?
Tomcat_WebModule_crossContext	Should we allow the ServletContext.getContext() method to access the context of other web applications in this server?
Tomcat_WebModule_delegate	Tomcat WebModule delegate.
Tomcat_WebModule_distributable	The distributable flag for this web application.
Tomcat_WebModule_errorCount	Cumulative error count of all servlets in this context.
Tomcat_WebModule_ignoreAnnotations	Ignore annotations flag.
Tomcat_WebModule_logEffectiveWebXml	Should the effective web.xml be logged when the context starts?
Tomcat_WebModule_mapperContextRootRedirectEnabled	Should the Mapper be used for context root redirects?
Tomcat_WebModule_mapperDirectoryRedirectEnabled	Should the Mapper be used for directory redirects?
Tomcat_WebModule_maxTime	Maximum execution time of all servlets in this context.
Tomcat_WebModule_minTime	Minimum execution time of all servlets in this context.
Tomcat_WebModule_override	The default context.xml override flag for this web application.
Tomcat_WebModule_parallelAnnotationScanning	The parallel annotation scanning flag.
Tomcat_WebModule_paused	The request processing pause flag (while reloading occurs).
Tomcat_WebModule_privileged	Access to Tomcat internals.
Tomcat_WebModule_processingTime	Cumulative execution times of all servlets in this context.
Tomcat_WebModule_reloadable	The reloadable flag for this web application.
Tomcat_WebModule_renewThreadsWhenStoppingContext	Should Tomcat renew the threads of the thread pool when the application is stopped to avoid memory leaks because of uncleaned ThreadLocal variables?
Tomcat_WebModule_requestCount	Cumulative request count of all servlets in this context.
Tomcat_WebModule_sessionTimeout	The session timeout (in minutes) for this web application.
Tomcat_WebModule_startTime	Time (in milliseconds since January 1, 1970, 00:00:00) when this context was started.
Tomcat_WebModule_startupTime	Time (in milliseconds) it took to start this context.
Tomcat_WebModule_swallowOutput	Flag to set to cause the system.out and system.err to be redirected to the logger when executing a servlet.
Tomcat_WebModule_tldScanTime	Time spent scanning jars for TLDs for this context.
Tomcat_WebModule_tldValidation	Should the parsing of *.tld files be performed by a validating parser?
	Amount of ms that the container will wait for servlets to unload.
Tomcat_WebModule_unpackWAR	Unpack WAR property.
Tomcat_WebModule_useBloomFilterForArchives	DEPRECATED: Use a bloom filter for archives lookups.
Tomcat_WebModule_useHttpOnly	Indicates that session cookies should use HttpOnly.
Tomcat_WebModule_useNaming	Create a JNDI naming context for this application?
Tomcat_WebModule_useRelativeRedirects	When generating location headers for 302 responses, should a relative URI be used?
Tomcat_WebModule_xmlNamespaceAware	Should the parsing of web.xml and web-fragment.xml files be performed by a namespace-aware parser?
Tomcat_WebModule_xmlValidation	Should the parsing of web.xml and web-fragment.xml files be performed by a validating parser?

WebResourceRoot

Metric name	Description
Tomcat_WebResourceRoot_allowLinking	Does this resources implementation allow the use of symbolic links?
Tomcat_WebResourceRoot_cachingAllowed	Is in-memory caching of resource content and metadata enabled?
Tomcat_WebResourceRoot_hitCount	The number of requests for resources that were served from the cache.
Tomcat_WebResourceRoot_lookupCount	The number of requests for resources in the WebResourceRoot.
Tomcat_WebResourceRoot_maxSize	The maximum permitted size of the cache in kB.
Tomcat_WebResourceRoot_objectMaxSize	The maximum permitted size for a single object in the cache in kB.
Tomcat_WebResourceRoot_size	The current estimate of the cache size in kB.
Tomcat_WebResourceRoot_trackLockedFiles	Does this resources implementation track requests that lock files?
Tomcat_WebResourceRoot_ttl	The time-to-live for cache entries in milliseconds.

Notes

• The Web API metrics follow sonarqube_snake_case naming (Prometheus convention), while the JMX metrics use SonarQube_PascalCase naming (matching JMX MBean object names).
• JMX-exported metrics appear as Untyped in Prometheus because JMX MBeans do not carry Prometheus metric type metadata. Treat them as gauges for alerting and dashboard purposes.

Related page

• Introduction to setting up monitoring
• Setting up with Prometheus server