OAL 基礎知識

基本介紹

OAL(Observability Analysis Language) 是一門用來分析流式資料的語言。

因為 OAL 聚焦於度量 Service 、 Service Instance 和 Endpoint 的指標，所以它學習和使用起來非常簡單。

OAL 基於 altlr 與 javassist 將 oal 指令碼轉化為動態生成的類檔案。

自從 6.3 版本後， OAL 引擎內建在 OAP 伺服器中，可以看做 oal-rt(OAL Runtime) 。 OAL 指令碼位置 OAL 配置目錄下( /config/oal )，使用者能夠更改指令碼並重啟生效。注意： OAL 指令碼仍然是一門編譯語言， oal-rt 動態的生成 Java 程式碼。

如果你配置了環境變數 SW_OAL_ENGINE_DEBUG=Y，能在工作目錄下的 oal-rt 目錄下找到生成的 Class 檔案。

語法

  1. // 宣告一個指標
  2. METRICS_NAME = from(SCOPE.(* | [FIELD][,FIELD ...])) // 從某一個SCOPE中獲取資料
  3. [.filter(FIELD OP [INT | STRING])] // 可以過濾掉部分資料
  4. .FUNCTION([PARAM][, PARAM ...]) // 使用某個聚合函式將資料聚合
  6. // 禁用一個指標
  7. disable(METRICS_NAME);

語法案例

oap-server/server-bootstrap/src/main/resources/oal/java-agent.oal

  1. // 從ServiceInstanceJVMMemory的used獲取資料，只需要 heapStatus 為 true的資料，並取long型的平均值
  2. instance_jvm_memory_heap = from(ServiceInstanceJVMMemory.used).filter(heapStatus == true).longAvg();

org.apache.skywalking.oap.server.core.source.ServiceInstanceJVMMemory

  1. @ScopeDeclaration(id = SERVICE_INSTANCE_JVM_MEMORY, name = "ServiceInstanceJVMMemory", catalog = SERVICE_INSTANCE_CATALOG_NAME)
  2. @ScopeDefaultColumn.VirtualColumnDefinition(fieldName = "entityId", columnName = "entity_id", isID = true, type = String.class)
  3. public class ServiceInstanceJVMMemory extends Source {
  4.     @Override
  5.     public int scope() {
  6.         return DefaultScopeDefine.SERVICE_INSTANCE_JVM_MEMORY;
  7.     }
  9.     @Override
  10.     public String getEntityId() {
  11.         return String.valueOf(id);
  12.     }
  14.     @Getter @Setter
  15.     private String id;
  16.     @Getter @Setter @ScopeDefaultColumn.DefinedByField(columnName = "name", requireDynamicActive = true)
  17.     private String name;
  18.     @Getter @Setter @ScopeDefaultColumn.DefinedByField(columnName = "service_name", requireDynamicActive = true)
  19.     private String serviceName;
  20.     @Getter @Setter @ScopeDefaultColumn.DefinedByField(columnName = "service_id")
  21.     private String serviceId;
  22.     @Getter @Setter
  23.     private boolean heapStatus;
  24.     @Getter @Setter
  25.     private long init;
  26.     @Getter @Setter
  27.     private long max;
  28.     @Getter @Setter
  29.     private long used;
  30.     @Getter @Setter
  31.     private long committed;
  32. }

可供參考的官方文件：Observability Analysis Language

從一個案例開始分析 OAL 原理

缺少的類載入資訊監控

預設的 APM/Instance 頁面，缺少關於 JVM Class 的資訊（如下圖所示），故這次將相關資訊補齊。由這次案例來分析 OAL 的原理。

在 Skywalking-04：擴充套件Metric監控資訊 中，講到了如何在已有 Source 類的情況下，增加一些指標。

這次直接連 Source 類以及 OAL 詞法語法關鍵字都自己定義。

可供參考的官方文件：Source and Scope extension for new metrics

確定增加的指標

通過Java ManagementFactory解析這篇文章，可以確定監控指標為“當前載入類的數量”、“已解除安裝類的數量”、“一共載入類的數量”三個指標

  1. ClassLoadingMXBean classLoadingMXBean = ManagementFactory.getClassLoadingMXBean();
  2. // 當前載入類的數量
  3. int loadedClassCount = classLoadingMXBean.getLoadedClassCount();
  4. // 已解除安裝類的數量
  5. long unloadedClassCount = classLoadingMXBean.getUnloadedClassCount();
  6. // 一共載入類的數量
  7. long totalLoadedClassCount = classLoadingMXBean.getTotalLoadedClassCount();

定義 agent 與 oap server 通訊類

在 apm-protocol/apm-network/src/main/proto/language-agent/JVMMetric.proto 協議檔案中增加如下定義。

在 apm-protocol/apm-network 目錄下執行 mvn clean package -DskipTests=true 會生成新的相關 Java 類，org.apache.skywalking.apm.network.language.agent.v3.Class 該類就是我們在程式碼中實際操作的類。

  1. message Class {
  2.   int64 loadedClassCount = 1;
  3.   int64 unloadedClassCount = 3;
  4.   int64 totalLoadedClassCount = 2;
  5. }
  7. message JVMMetric {
  8.     int64 time = 1;
  9.     CPU cpu = 2;
  10.     repeated Memory memory = 3;
  11.     repeated MemoryPool memoryPool = 4;
  12.     repeated GC gc = 5;
  13.     Thread thread = 6;
  14.     // 在JVM指標中新增Class的定義
  15.     Class clazz = 7;
  16. }

收集 agent 的資訊後，將資訊傳送至 oap server

收集 Class 相關的指標資訊

  1. package org.apache.skywalking.apm.agent.core.jvm.clazz;
  3. import org.apache.skywalking.apm.network.language.agent.v3.Class;
  5. import java.lang.management.ClassLoadingMXBean;
  6. import java.lang.management.ManagementFactory;
  8. public enum ClassProvider {
  9.     /**
  10.      * instance
  11.      */
  12.     INSTANCE;
  14.     private final ClassLoadingMXBean classLoadingMXBean;
  16.     ClassProvider() {
  17.         this.classLoadingMXBean = ManagementFactory.getClassLoadingMXBean();
  18.     }
  20.     // 構建class的指標資訊
  21.     public Class getClassMetrics() {
  22.         int loadedClassCount = classLoadingMXBean.getLoadedClassCount();
  23.         long unloadedClassCount = classLoadingMXBean.getUnloadedClassCount();
  24.         long totalLoadedClassCount = classLoadingMXBean.getTotalLoadedClassCount();
  25.         return Class.newBuilder().setLoadedClassCount(loadedClassCount)
  26.                 .setUnloadedClassCount(unloadedClassCount)
  27.                 .setTotalLoadedClassCount(totalLoadedClassCount)
  28.                 .build();
  29.     }
  31. }

在 org.apache.skywalking.apm.agent.core.jvm.JVMService#run 方法中，將 class 相關指標設定到 JVM 指標類中

  1.     @Override
  2.     public void run() {
  3.         long currentTimeMillis = System.currentTimeMillis();
  4.         try {
  5.             JVMMetric.Builder jvmBuilder = JVMMetric.newBuilder();
  6.             jvmBuilder.setTime(currentTimeMillis);
  7.             jvmBuilder.setCpu(CPUProvider.INSTANCE.getCpuMetric());
  8.             jvmBuilder.addAllMemory(MemoryProvider.INSTANCE.getMemoryMetricList());
  9.             jvmBuilder.addAllMemoryPool(MemoryPoolProvider.INSTANCE.getMemoryPoolMetricsList());
  10.             jvmBuilder.addAllGc(GCProvider.INSTANCE.getGCList());
  11.             jvmBuilder.setThread(ThreadProvider.INSTANCE.getThreadMetrics());
  12.             // 設定class的指標
  13.             jvmBuilder.setClazz(ClassProvider.INSTANCE.getClassMetrics());
  14. 			// 將JVM的指標放在阻塞佇列中
  15.             // org.apache.skywalking.apm.agent.core.jvm.JVMMetricsSender#run方法，會將相關資訊傳送至oap server
  16.             sender.offer(jvmBuilder.build());
  17.         } catch (Exception e) {
  18.             LOGGER.error(e, "Collect JVM info fail.");
  19.         }
  20.     }

建立 Source 類

  1. public class DefaultScopeDefine {
  2.     public static final int SERVICE_INSTANCE_JVM_CLASS = 11000;
  4.     /** Catalog of scope, the metrics processor could use this to group all generated metrics by oal rt. */
  5.     public static final String SERVICE_INSTANCE_CATALOG_NAME = "SERVICE_INSTANCE";
  6. }
  1. package org.apache.skywalking.oap.server.core.source;
  3. import lombok.Getter;
  4. import lombok.Setter;
  6. import static org.apache.skywalking.oap.server.core.source.DefaultScopeDefine.SERVICE_INSTANCE_CATALOG_NAME;
  7. import static org.apache.skywalking.oap.server.core.source.DefaultScopeDefine.SERVICE_INSTANCE_JVM_CLASS;
  9. @ScopeDeclaration(id = SERVICE_INSTANCE_JVM_CLASS, name = "ServiceInstanceJVMClass", catalog = SERVICE_INSTANCE_CATALOG_NAME)
  10. @ScopeDefaultColumn.VirtualColumnDefinition(fieldName = "entityId", columnName = "entity_id", isID = true, type = String.class)
  11. public class ServiceInstanceJVMClass extends Source {
  12.     @Override
  13.     public int scope() {
  14.         return SERVICE_INSTANCE_JVM_CLASS;
  15.     }
  17.     @Override
  18.     public String getEntityId() {
  19.         return String.valueOf(id);
  20.     }
  22.     @Getter @Setter
  23.     private String id;
  24.     @Getter @Setter @ScopeDefaultColumn.DefinedByField(columnName = "name", requireDynamicActive = true)
  25.     private String name;
  26.     @Getter @Setter @ScopeDefaultColumn.DefinedByField(columnName = "service_name", requireDynamicActive = true)
  27.     private String serviceName;
  28.     @Getter @Setter @ScopeDefaultColumn.DefinedByField(columnName = "service_id")
  29.     private String serviceId;
  30.     @Getter @Setter
  31.     private long loadedClassCount;
  32.     @Getter @Setter
  33.     private long unloadedClassCount;
  34.     @Getter @Setter
  35.     private long totalLoadedClassCount;
  36. }

將從 agent 獲取到的資訊，傳送至 SourceReceive

在 org.apache.skywalking.oap.server.analyzer.provider.jvm.JVMSourceDispatcher 進行如下修改

  1.     public void sendMetric(String service, String serviceInstance, JVMMetric metrics) {
  2.         long minuteTimeBucket = TimeBucket.getMinuteTimeBucket(metrics.getTime());
  4.         final String serviceId = IDManager.ServiceID.buildId(service, NodeType.Normal);
  5.         final String serviceInstanceId = IDManager.ServiceInstanceID.buildId(serviceId, serviceInstance);
  7.         this.sendToCpuMetricProcess(
  8.             service, serviceId, serviceInstance, serviceInstanceId, minuteTimeBucket, metrics.getCpu());
  9.         this.sendToMemoryMetricProcess(
  10.             service, serviceId, serviceInstance, serviceInstanceId, minuteTimeBucket, metrics.getMemoryList());
  11.         this.sendToMemoryPoolMetricProcess(
  12.             service, serviceId, serviceInstance, serviceInstanceId, minuteTimeBucket, metrics.getMemoryPoolList());
  13.         this.sendToGCMetricProcess(
  14.             service, serviceId, serviceInstance, serviceInstanceId, minuteTimeBucket, metrics.getGcList());
  15.         this.sendToThreadMetricProcess(
  16.                 service, serviceId, serviceInstance, serviceInstanceId, minuteTimeBucket, metrics.getThread());
  17.         // class指標處理
  18.         this.sendToClassMetricProcess(
  19.                 service, serviceId, serviceInstance, serviceInstanceId, minuteTimeBucket, metrics.getClazz());
  20.     }
  22.     private void sendToClassMetricProcess(String service,
  23.             String serviceId,
  24.             String serviceInstance,
  25.             String serviceInstanceId,
  26.             long timeBucket,
  27.             Class clazz) {
  28.         // 拼裝Source物件
  29.         ServiceInstanceJVMClass serviceInstanceJVMClass = new ServiceInstanceJVMClass();
  30.         serviceInstanceJVMClass.setId(serviceInstanceId);
  31.         serviceInstanceJVMClass.setName(serviceInstance);
  32.         serviceInstanceJVMClass.setServiceId(serviceId);
  33.         serviceInstanceJVMClass.setServiceName(service);
  34.         serviceInstanceJVMClass.setLoadedClassCount(clazz.getLoadedClassCount());
  35.         serviceInstanceJVMClass.setUnloadedClassCount(clazz.getUnloadedClassCount());
  36.         serviceInstanceJVMClass.setTotalLoadedClassCount(clazz.getTotalLoadedClassCount());
  37.         serviceInstanceJVMClass.setTimeBucket(timeBucket);
  38.         // 將Source物件傳送至SourceReceive進行處理
  39.         sourceReceiver.receive(serviceInstanceJVMClass);
  40.     }

在 OAL 詞法定義和語法定義中加入 Source 相關資訊

在 oap-server/oal-grammar/src/main/antlr4/org/apache/skywalking/oal/rt/grammar/OALLexer.g4 定義 Class 關鍵字

  1. // Keywords
  3. FROM: 'from';
  4. FILTER: 'filter';
  5. DISABLE: 'disable';
  6. SRC_ALL: 'All';
  7. SRC_SERVICE: 'Service';
  8. SRC_SERVICE_INSTANCE: 'ServiceInstance';
  9. SRC_ENDPOINT: 'Endpoint';
  10. SRC_SERVICE_RELATION: 'ServiceRelation';
  11. SRC_SERVICE_INSTANCE_RELATION: 'ServiceInstanceRelation';
  12. SRC_ENDPOINT_RELATION: 'EndpointRelation';
  13. SRC_SERVICE_INSTANCE_JVM_CPU: 'ServiceInstanceJVMCPU';
  14. SRC_SERVICE_INSTANCE_JVM_MEMORY: 'ServiceInstanceJVMMemory';
  15. SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL: 'ServiceInstanceJVMMemoryPool';
  16. SRC_SERVICE_INSTANCE_JVM_GC: 'ServiceInstanceJVMGC';
  17. SRC_SERVICE_INSTANCE_JVM_THREAD: 'ServiceInstanceJVMThread';
  18. SRC_SERVICE_INSTANCE_JVM_CLASS:'ServiceInstanceJVMClass'; // 在OAL詞法定義中新增Class的關鍵字
  19. SRC_DATABASE_ACCESS: 'DatabaseAccess';
  20. SRC_SERVICE_INSTANCE_CLR_CPU: 'ServiceInstanceCLRCPU';
  21. SRC_SERVICE_INSTANCE_CLR_GC: 'ServiceInstanceCLRGC';
  22. SRC_SERVICE_INSTANCE_CLR_THREAD: 'ServiceInstanceCLRThread';
  23. SRC_ENVOY_INSTANCE_METRIC: 'EnvoyInstanceMetric';

在 oap-server/oal-grammar/src/main/antlr4/org/apache/skywalking/oal/rt/grammar/OALParser.g4 新增 Class 關鍵字

  1. source
  2.     : SRC_ALL | SRC_SERVICE | SRC_DATABASE_ACCESS | SRC_SERVICE_INSTANCE | SRC_ENDPOINT |
  3.       SRC_SERVICE_RELATION | SRC_SERVICE_INSTANCE_RELATION | SRC_ENDPOINT_RELATION |
  4.       SRC_SERVICE_INSTANCE_JVM_CPU | SRC_SERVICE_INSTANCE_JVM_MEMORY | SRC_SERVICE_INSTANCE_JVM_MEMORY_POOL |
  5.       SRC_SERVICE_INSTANCE_JVM_GC | SRC_SERVICE_INSTANCE_JVM_THREAD | SRC_SERVICE_INSTANCE_JVM_CLASS |// 在OAL語法定義中新增詞法定義中定義的關鍵字
  6.       SRC_SERVICE_INSTANCE_CLR_CPU | SRC_SERVICE_INSTANCE_CLR_GC | SRC_SERVICE_INSTANCE_CLR_THREAD |
  7.       SRC_ENVOY_INSTANCE_METRIC |
  8.       SRC_BROWSER_APP_PERF | SRC_BROWSER_APP_PAGE_PERF | SRC_BROWSER_APP_SINGLE_VERSION_PERF |
  9.       SRC_BROWSER_APP_TRAFFIC | SRC_BROWSER_APP_PAGE_TRAFFIC | SRC_BROWSER_APP_SINGLE_VERSION_TRAFFIC
  10.     ;

在 oap-server/oal-grammar 目錄下執行 mvn clean package -DskipTests=true 會生成新的相關 Java 類

定義 OAL 指標

在 oap-server/server-bootstrap/src/main/resources/oal/java-agent.oal 中新增基於 OAL 語法的 Class 相關指標定義

  1. // 當前載入類的數量
  2. instance_jvm_class_loaded_class_count = from(ServiceInstanceJVMClass.loadedClassCount).longAvg();
  3. // 已解除安裝類的數量
  4. instance_jvm_class_unloaded_class_count = from(ServiceInstanceJVMClass.unloadedClassCount).longAvg();
  5. // 一共載入類的數量
  6. instance_jvm_class_total_loaded_class_count = from(ServiceInstanceJVMClass.totalLoadedClassCount).longAvg();

配置 UI 面板

將如下介面配置匯入 APM 面板中

  1. {
  2.   "name": "Instance",
  3.   "children": [{
  4.       "width": "3",
  5.       "title": "Service Instance Load",
  6.       "height": "250",
  7.       "entityType": "ServiceInstance",
  8.       "independentSelector": false,
  9.       "metricType": "REGULAR_VALUE",
  10.       "metricName": "service_instance_cpm",
  11.       "queryMetricType": "readMetricsValues",
  12.       "chartType": "ChartLine",
  13.       "unit": "CPM - calls per minute"
  14.     },
  15.     {
  16.       "width": 3,
  17.       "title": "Service Instance Throughput",
  18.       "height": "250",
  19.       "entityType": "ServiceInstance",
  20.       "independentSelector": false,
  21.       "metricType": "REGULAR_VALUE",
  22.       "metricName": "service_instance_throughput_received,service_instance_throughput_sent",
  23.       "queryMetricType": "readMetricsValues",
  24.       "chartType": "ChartLine",
  25.       "unit": "Bytes"
  26.     },
  27.     {
  28.       "width": "3",
  29.       "title": "Service Instance Successful Rate",
  30.       "height": "250",
  31.       "entityType": "ServiceInstance",
  32.       "independentSelector": false,
  33.       "metricType": "REGULAR_VALUE",
  34.       "metricName": "service_instance_sla",
  35.       "queryMetricType": "readMetricsValues",
  36.       "chartType": "ChartLine",
  37.       "unit": "%",
  38.       "aggregation": "/",
  39.       "aggregationNum": "100"
  40.     },
  41.     {
  42.       "width": "3",
  43.       "title": "Service Instance Latency",
  44.       "height": "250",
  45.       "entityType": "ServiceInstance",
  46.       "independentSelector": false,
  47.       "metricType": "REGULAR_VALUE",
  48.       "metricName": "service_instance_resp_time",
  49.       "queryMetricType": "readMetricsValues",
  50.       "chartType": "ChartLine",
  51.       "unit": "ms"
  52.     },
  53.     {
  54.       "width": 3,
  55.       "title": "JVM CPU (Java Service)",
  56.       "height": "250",
  57.       "entityType": "ServiceInstance",
  58.       "independentSelector": false,
  59.       "metricType": "REGULAR_VALUE",
  60.       "metricName": "instance_jvm_cpu",
  61.       "queryMetricType": "readMetricsValues",
  62.       "chartType": "ChartLine",
  63.       "unit": "%",
  64.       "aggregation": "+",
  65.       "aggregationNum": ""
  66.     },
  67.     {
  68.       "width": 3,
  69.       "title": "JVM Memory (Java Service)",
  70.       "height": "250",
  71.       "entityType": "ServiceInstance",
  72.       "independentSelector": false,
  73.       "metricType": "REGULAR_VALUE",
  74.       "metricName": "instance_jvm_memory_heap, instance_jvm_memory_heap_max,instance_jvm_memory_noheap, instance_jvm_memory_noheap_max",
  75.       "queryMetricType": "readMetricsValues",
  76.       "chartType": "ChartLine",
  77.       "unit": "MB",
  78.       "aggregation": "/",
  79.       "aggregationNum": "1048576"
  80.     },
  81.     {
  82.       "width": 3,
  83.       "title": "JVM GC Time",
  84.       "height": "250",
  85.       "entityType": "ServiceInstance",
  86.       "independentSelector": false,
  87.       "metricType": "REGULAR_VALUE",
  88.       "metricName": "instance_jvm_young_gc_time, instance_jvm_old_gc_time",
  89.       "queryMetricType": "readMetricsValues",
  90.       "chartType": "ChartLine",
  91.       "unit": "ms"
  92.     },
  93.     {
  94.       "width": 3,
  95.       "title": "JVM GC Count",
  96.       "height": "250",
  97.       "entityType": "ServiceInstance",
  98.       "independentSelector": false,
  99.       "metricType": "REGULAR_VALUE",
  100.       "queryMetricType": "readMetricsValues",
  101.       "chartType": "ChartBar",
  102.       "metricName": "instance_jvm_young_gc_count, instance_jvm_old_gc_count"
  103.     },
  104.     {
  105.       "width": 3,
  106.       "title": "JVM Thread Count (Java Service)",
  107.       "height": "250",
  108.       "entityType": "ServiceInstance",
  109.       "independentSelector": false,
  110.       "metricType": "REGULAR_VALUE",
  111.       "queryMetricType": "readMetricsValues",
  112.       "chartType": "ChartLine",
  113.       "metricName": "instance_jvm_thread_live_count, instance_jvm_thread_daemon_count, instance_jvm_thread_peak_count,instance_jvm_thread_deadlocked,instance_jvm_thread_monitor_deadlocked"
  114.     },
  115.     {
  116.       "width": 3,
  117.       "title": "JVM Thread State Count (Java Service)",
  118.       "height": "250",
  119.       "entityType": "ServiceInstance",
  120.       "independentSelector": false,
  121.       "metricType": "REGULAR_VALUE",
  122.       "metricName": "instance_jvm_thread_new_thread_count,instance_jvm_thread_runnable_thread_count,instance_jvm_thread_blocked_thread_count,instance_jvm_thread_wait_thread_count,instance_jvm_thread_time_wait_thread_count,instance_jvm_thread_terminated_thread_count",
  123.       "queryMetricType": "readMetricsValues",
  124.       "chartType": "ChartBar"
  125.     },
  126.     {
  127.       "width": 3,
  128.       "title": "JVM Class Count (Java Service)",
  129.       "height": "250",
  130.       "entityType": "ServiceInstance",
  131.       "independentSelector": false,
  132.       "metricType": "REGULAR_VALUE",
  133.       "metricName": "instance_jvm_class_loaded_class_count,instance_jvm_class_unloaded_class_count,instance_jvm_class_total_loaded_class_count",
  134.       "queryMetricType": "readMetricsValues",
  135.       "chartType": "ChartArea"
  136.     },
  137.     {
  138.       "width": 3,
  139.       "title": "CLR CPU  (.NET Service)",
  140.       "height": "250",
  141.       "entityType": "ServiceInstance",
  142.       "independentSelector": false,
  143.       "metricType": "REGULAR_VALUE",
  144.       "metricName": "instance_clr_cpu",
  145.       "queryMetricType": "readMetricsValues",
  146.       "chartType": "ChartLine",
  147.       "unit": "%"
  148.     },
  149.     {
  150.       "width": 3,
  151.       "title": "CLR GC (.NET Service)",
  152.       "height": "250",
  153.       "entityType": "ServiceInstance",
  154.       "independentSelector": false,
  155.       "metricType": "REGULAR_VALUE",
  156.       "metricName": "instance_clr_gen0_collect_count, instance_clr_gen1_collect_count, instance_clr_gen2_collect_count",
  157.       "queryMetricType": "readMetricsValues",
  158.       "chartType": "ChartBar"
  159.     },
  160.     {
  161.       "width": 3,
  162.       "title": "CLR Heap Memory (.NET Service)",
  163.       "height": "250",
  164.       "entityType": "ServiceInstance",
  165.       "independentSelector": false,
  166.       "metricType": "REGULAR_VALUE",
  167.       "metricName": "instance_clr_heap_memory",
  168.       "queryMetricType": "readMetricsValues",
  169.       "chartType": "ChartLine",
  170.       "unit": "MB",
  171.       "aggregation": "/",
  172.       "aggregationNum": "1048576"
  173.     },
  174.     {
  175.       "width": 3,
  176.       "title": "CLR Thread (.NET Service)",
  177.       "height": "250",
  178.       "entityType": "ServiceInstance",
  179.       "independentSelector": false,
  180.       "metricType": "REGULAR_VALUE",
  181.       "queryMetricType": "readMetricsValues",
  182.       "chartType": "ChartLine",
  183.       "metricName": "instance_clr_available_completion_port_threads,instance_clr_available_worker_threads,instance_clr_max_completion_port_threads,instance_clr_max_worker_threads"
  184.     }
  185.   ]
  186. }

結果校驗

可以看到匯入的介面中，已經有 Class 相關指標了

程式碼貢獻

參考文件

分享並記錄所學所見