Table of Agent Configuration Properties

This is the properties list supported in agent/config/agent.config.

property key Description Default
agent.namespace Namespace isolates headers in cross process propagation. The HEADER name will be HeaderName:Namespace. Not set
agent.service_name The service name to represent a logic group providing the same capabilities/logic. Suggestion: set a unique name for every logic service group, service instance nodes share the same code, Max length is 50(UTF-8 char). Optional, once service_name follows <group name>::<logic name> format, OAP server assigns the group name to the service metadata. Your_ApplicationName
agent.sample_n_per_3_secs Negative or zero means off, by default.SAMPLE_N_PER_3_SECS means sampling N TraceSegment in 3 seconds tops. Not set
agent.authentication Authentication active is based on backend setting, see application.yml for more details.For most scenarios, this needs backend extensions, only basic match auth provided in default implementation. Not set
agent.trace_segment_ref_limit_per_span The max number of TraceSegmentRef in a single span to keep memory cost estimatable. 500
agent.span_limit_per_segment The max number of spans in a single segment. Through this config item, SkyWalking keep your application memory cost estimated. 300
agent.ignore_suffix If the operation name of the first span is included in this set, this segment should be ignored. Not set
agent.is_open_debugging_class If true, skywalking agent will save all instrumented classes files in /debugging folder. SkyWalking team may ask for these files in order to resolve compatible problem. Not set
agent.is_cache_enhanced_class If true, SkyWalking agent will cache all instrumented classes files to memory or disk files (decided by class cache mode), allow another java agent to enhance those classes that enhanced by SkyWalking agent. To use some Java diagnostic tools (such as BTrace, Arthas) to diagnose applications or add a custom java agent to enhance classes, you need to enable this feature. false
agent.class_cache_mode The instrumented classes cache mode: MEMORY or FILE. MEMORY: cache class bytes to memory, if instrumented classes is too many or too large, it may take up more memory. FILE: cache class bytes in /class-cache folder, automatically clean up cached class files when the application exits. MEMORY
agent.instance_name Instance name is the identity of an instance, should be unique in the service. If empty, SkyWalking agent will generate an 32-bit uuid. Default, use UUID@hostname as the instance name. Max length is 50(UTF-8 char) ""
agent.instance_properties[key]=value Add service instance custom properties. Not set
agent.cause_exception_depth How depth the agent goes, when log all cause exceptions. 5
agent.force_reconnection_period Force reconnection period of grpc, based on grpc_channel_check_interval. 1
agent.operation_name_threshold The operationName max length, setting this value > 190 is not recommended. 150
agent.keep_tracing Keep tracing even the backend is not available if this value is true. false
agent.force_tls Force open TLS for gRPC channel if this value is true. false
agent.ssl_trusted_ca_path gRPC SSL trusted ca file. /ca/ca.crt
agent.ssl_key_path The private key file. Enable mTLS when ssl_key_path and ssl_cert_chain_path exist. ""
agent.ssl_cert_chain_path The certificate file. Enable mTLS when ssl_key_path and ssl_cert_chain_path exist. ""
osinfo.ipv4_list_size Limit the length of the ipv4 list size. 10
collector.grpc_channel_check_interval grpc channel status check interval. 30
collector.heartbeat_period agent heartbeat report period. Unit, second. 30
collector.properties_report_period_factor The agent sends the instance properties to the backend every collector.heartbeat_period * collector.properties_report_period_factor seconds 10
collector.backend_service Collector SkyWalking trace receiver service addresses. 127.0.0.1:11800
collector.grpc_upstream_timeout How long grpc client will timeout in sending data to upstream. Unit is second. 30 seconds
collector.get_profile_task_interval Sniffer get profile task list interval. 20
collector.get_agent_dynamic_config_interval Sniffer get agent dynamic config interval 20
collector.is_resolve_dns_periodically If true, skywalking agent will enable periodically resolving DNS to update receiver service addresses. false
logging.level Log level: TRACE, DEBUG, INFO, WARN, ERROR, OFF. Default is info. INFO
logging.file_name Log file name. skywalking-api.log
logging.output Log output. Default is FILE. Use CONSOLE means output to stdout. FILE
logging.dir Log files directory. Default is blank string, means, use “{theSkywalkingAgentJarDir}/logs " to output logs. {theSkywalkingAgentJarDir} is the directory where the skywalking agent jar file is located ""
logging.resolver Logger resolver: PATTERN or JSON. The default is PATTERN, which uses logging.pattern to print traditional text logs. JSON resolver prints logs in JSON format. PATTERN
logging.pattern Logging format. There are all conversion specifiers:
  * %level means log level.
  * %timestamp means now of time with format yyyy-MM-dd HH:mm:ss:SSS.
  * %thread means name of current thread.
  * %msg means some message which user logged.
  * %class means SimpleName of TargetClass.
  * %throwable means a throwable which user called.
  * %agent_name means agent.service_name. Only apply to the PatternLogger.
%level %timestamp %thread %class : %msg %throwable
logging.max_file_size The max size of log file. If the size is bigger than this, archive the current file, and write into a new file. 300 * 1024 * 1024
logging.max_history_files The max history log files. When rollover happened, if log files exceed this number,then the oldest file will be delete. Negative or zero means off, by default. -1
statuscheck.ignored_exceptions Listed exceptions would not be treated as an error. Because in some codes, the exception is being used as a way of controlling business flow. ""
statuscheck.max_recursive_depth The max recursive depth when checking the exception traced by the agent. Typically, we don’t recommend setting this more than 10, which could cause a performance issue. Negative value and 0 would be ignored, which means all exceptions would make the span tagged in error status. 1
correlation.element_max_number Max element count in the correlation context. 3
correlation.value_max_length Max value length of each element. 128
correlation.auto_tag_keys Tag the span by the key/value in the correlation context, when the keys listed here exist. ""
jvm.buffer_size The buffer size of collected JVM info. 60 * 10
buffer.channel_size The buffer channel size. 5
buffer.buffer_size The buffer size. 300
profile.active If true, skywalking agent will enable profile when user create a new profile task. Otherwise disable profile. true
profile.max_parallel Parallel monitor segment count 5
profile.duration Max monitor segment time(minutes), if current segment monitor time out of limit, then stop it. 10
profile.dump_max_stack_depth Max dump thread stack depth 500
profile.snapshot_transport_buffer_size Snapshot transport to backend buffer size 50
meter.active If true, the agent collects and reports metrics to the backend. true
meter.report_interval Report meters interval. The unit is second 20
meter.max_meter_size Max size of the meter pool 500
log.max_message_size The max size of message to send to server.Default is 10 MB. 10485760
plugin.mount Mount the specific folders of the plugins. Plugins in mounted folders would work. plugins,activations
plugin.peer_max_length Peer maximum description limit. 200
plugin.exclude_plugins Exclude some plugins define in plugins dir.Plugin names is defined in Agent plugin list ""
plugin.mongodb.trace_param If true, trace all the parameters in MongoDB access, default is false. Only trace the operation, not include parameters. false
plugin.mongodb.filter_length_limit If set to positive number, the WriteRequest.params would be truncated to this length, otherwise it would be completely saved, which may cause performance problem. 256
plugin.elasticsearch.trace_dsl If true, trace all the DSL(Domain Specific Language) in ElasticSearch access, default is false. false
plugin.springmvc.use_qualified_name_as_endpoint_name If true, the fully qualified method name will be used as the endpoint name instead of the request URL, default is false. false
plugin.toolit.use_qualified_name_as_operation_name If true, the fully qualified method name will be used as the operation name instead of the given operation name, default is false. false
plugin.jdbc.trace_sql_parameters If set to true, the parameters of the sql (typically java.sql.PreparedStatement) would be collected. false
plugin.jdbc.sql_parameters_max_length If set to positive number, the db.sql.parameters would be truncated to this length, otherwise it would be completely saved, which may cause performance problem. 512
plugin.jdbc.sql_body_max_length If set to positive number, the db.statement would be truncated to this length, otherwise it would be completely saved, which may cause performance problem. 2048
plugin.solrj.trace_statement If true, trace all the query parameters(include deleteByIds and deleteByQuery) in Solr query request, default is false. false
plugin.solrj.trace_ops_params If true, trace all the operation parameters in Solr request, default is false. false
plugin.light4j.trace_handler_chain If true, trace all middleware/business handlers that are part of the Light4J handler chain for a request. false
plugin.springtransaction.simplify_transaction_definition_name If true, the transaction definition name will be simplified. false
plugin.jdkthreading.threading_class_prefixes Threading classes (java.lang.Runnable and java.util.concurrent.Callable) and their subclasses, including anonymous inner classes whose name match any one of the THREADING_CLASS_PREFIXES (splitted by ,) will be instrumented, make sure to only specify as narrow prefixes as what you’re expecting to instrument, (java. and javax. will be ignored due to safety issues) Not set
plugin.tomcat.collect_http_params This config item controls that whether the Tomcat plugin should collect the parameters of the request. Also, activate implicitly in the profiled trace. false
plugin.springmvc.collect_http_params This config item controls that whether the SpringMVC plugin should collect the parameters of the request, when your Spring application is based on Tomcat, consider only setting either plugin.tomcat.collect_http_params or plugin.springmvc.collect_http_params. Also, activate implicitly in the profiled trace. false
plugin.httpclient.collect_http_params This config item controls that whether the HttpClient plugin should collect the parameters of the request false
plugin.http.http_params_length_threshold When COLLECT_HTTP_PARAMS is enabled, how many characters to keep and send to the OAP backend, use negative values to keep and send the complete parameters, NB. this config item is added for the sake of performance. 1024
plugin.http.http_headers_length_threshold When include_http_headers declares header names, this threshold controls the length limitation of all header values. use negative values to keep and send the complete headers. Note. this config item is added for the sake of performance. 2048
plugin.http.include_http_headers Set the header names, which should be collected by the plugin. Header name must follow javax.servlet.http definition. Multiple names should be split by comma. ``(No header would be collected) |
plugin.feign.collect_request_body This config item controls that whether the Feign plugin should collect the http body of the request. false
plugin.feign.filter_length_limit When COLLECT_REQUEST_BODY is enabled, how many characters to keep and send to the OAP backend, use negative values to keep and send the complete body. 1024
plugin.feign.supported_content_types_prefix When COLLECT_REQUEST_BODY is enabled and content-type start with SUPPORTED_CONTENT_TYPES_PREFIX, collect the body of the request , multiple paths should be separated by , application/json,text/
plugin.influxdb.trace_influxql If true, trace all the influxql(query and write) in InfluxDB access, default is true. true
plugin.dubbo.collect_consumer_arguments Apache Dubbo consumer collect arguments in RPC call, use Object#toString to collect arguments. false
plugin.dubbo.consumer_arguments_length_threshold When plugin.dubbo.collect_consumer_arguments is true, Arguments of length from the front will to the OAP backend 256
plugin.dubbo.collect_provider_arguments Apache Dubbo provider collect arguments in RPC call, use Object#toString to collect arguments. false
plugin.dubbo.provider_arguments_length_threshold When plugin.dubbo.collect_provider_arguments is true, Arguments of length from the front will to the OAP backend 256
plugin.kafka.bootstrap_servers A list of host/port pairs to use for establishing the initial connection to the Kafka cluster. localhost:9092
plugin.kafka.get_topic_timeout Timeout period of reading topics from the Kafka server, the unit is second. 10
plugin.kafka.producer_config Kafka producer configuration. Read producer configure to get more details. Check Kafka report doc for more details and examples.
plugin.kafka.producer_config_json Configure Kafka Producer configuration in JSON format. Notice it will be overridden by plugin.kafka.producer_config[key], if the key duplication.
plugin.kafka.topic_meter Specify which Kafka topic name for Meter System data to report to. skywalking-meters
plugin.kafka.topic_metrics Specify which Kafka topic name for JVM metrics data to report to. skywalking-metrics
plugin.kafka.topic_segment Specify which Kafka topic name for traces data to report to. skywalking-segments
plugin.kafka.topic_profiling Specify which Kafka topic name for Thread Profiling snapshot to report to. skywalking-profilings
plugin.kafka.topic_management Specify which Kafka topic name for the register or heartbeat data of Service Instance to report to. skywalking-managements
plugin.kafka.topic_logging Specify which Kafka topic name for the logging data to report to. skywalking-logging
plugin.kafka.namespace isolate multi OAP server when using same Kafka cluster (final topic name will append namespace before Kafka topics with - ). `` |
plugin.springannotation.classname_match_regex Match spring beans with regular expression for the class name. Multiple expressions could be separated by a comma. This only works when Spring annotation plugin has been activated. All the spring beans tagged with @Bean,@Service,@Dao, or @Repository.
plugin.toolkit.log.transmit_formatted Whether or not to transmit logged data as formatted or un-formatted. true
plugin.lettuce.trace_redis_parameters If set to true, the parameters of Redis commands would be collected by Lettuce agent. false
plugin.lettuce.redis_parameter_max_length If set to positive number and plugin.lettuce.trace_redis_parameters is set to true, Redis command parameters would be collected and truncated to this length. 128
plugin.neo4j.trace_cypher_parameters If set to true, the parameters of the cypher would be collected. false
plugin.neo4j.cypher_parameters_max_length If set to positive number, the db.cypher.parameters would be truncated to this length, otherwise it would be completely saved, which may cause performance problem. 512
plugin.neo4j.cypher_body_max_length If set to positive number, the db.statement would be truncated to this length, otherwise it would be completely saved, which may cause performance problem. 2048

Dynamic Configurations

All configurations above are static, if you need to change some agent settings at runtime, please read CDS - Configuration Discovery Service document for more details.