主要內容更 監控參數說明
Maven坐標
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId> </dependency> <dependency><groupId>io.micrometer</groupId><artifactId>micrometer-registry-prometheus</artifactId> </dependency>
?
SpringBoot2.0 Actuator監控指標分析
| 序號 | 參數 | 參數說明 | 是否監控 | 監控手段 | 重要度 |
|---|---|---|---|---|---|
| ---JVM---??? | |||||
| 1 | ?jvm.memory.max | ?JVM最大內存 | ? | ? | ? |
| 2 | ?jvm.memory.committed | ?JVM可用內存 | 是 | ?展示并監控堆內存和Metaspace | 重要 |
| 3 | ?jvm.memory.used | ?JVM已用內存 | 是 | ?展示并監控堆內存和Metaspace | 重要 |
| 4 | ?jvm.buffer.memory.used | ?JVM緩沖區已用內存 | ? | ? | ? |
| 5 | ?jvm.buffer.count | ?當前緩沖區數 | ? | ? | ? |
| 6 | ?jvm.threads.daemon | ?JVM守護線程數 | 是 | ?顯示在監控頁面 | ? |
| 7 | ?jvm.threads.live | ?JVM當前活躍線程數 | 是 | ?顯示在監控頁面；監控達到閾值時報警 | 重要 |
| 8 | ?jvm.threads.peak | ?JVM峰值線程數 | 是 | ?顯示在監控頁面 | ? |
| 9 | ?jvm.classes.loaded | ?加載classes數 | ? | ? | ? |
| 10 | ?jvm.classes.unloaded | ?未加載的classes數 | ? | ? | ? |
| 11 | ?jvm.gc.memory.allocated | ?GC時，年輕代分配的內存空間 | ? | ? | ? |
| 12 | ?jvm.gc.memory.promoted | ?GC時，老年代分配的內存空間 | ? | ? | ? |
| 13 | ?jvm.gc.max.data.size | ?GC時，老年代的最大內存空間 | ? | ? | ? |
| 14 | ?jvm.gc.live.data.size | ?FullGC時，老年代的內存空間 | ? | ? | ? |
| 15 | ?jvm.gc.pause | ?GC耗時 | 是 | ?顯示在監控頁面 | ? |
| ---TOMCAT---??? | |||||
| 16 | ?tomcat.sessions.created | ?tomcat已創建session數 | ? | ? | ? |
| 17 | ?tomcat.sessions.expired | ?tomcat已過期session數 | ? | ? | ? |
| 18 | ?tomcat.sessions.active.current | ?tomcat活躍session數 | ? | ? | ? |
| 19 | ?tomcat.sessions.active.max | ?tomcat最多活躍session數 | 是 | ?顯示在監控頁面，超過閾值可報警或者進行動態擴容 | 重要 |
| 20 | ?tomcat.sessions.alive.max.second | ?tomcat最多活躍session數持續時間 | ? | ? | ? |
| 21 | ?tomcat.sessions.rejected | ?超過session最大配置后，拒絕的session個數 | 是 | ?顯示在監控頁面，方便分析問題 | ? |
| 22 | ?tomcat.global.error | ?錯誤總數 | 是 | ?顯示在監控頁面，方便分析問題 | ? |
| 23 | ?tomcat.global.sent | ?發送的字節數 | ? | ? | ? |
| 24 | ?tomcat.global.request.max | ?request最長時間 | ? | ? | ? |
| 25 | ?tomcat.global.request | ?全局request次數和時間 | ? | ? | ? |
| 26 | ?tomcat.global.received | ?全局received次數和時間 | ? | ? | ? |
| 27 | ?tomcat.servlet.request | ?servlet的請求次數和時間 | ? | ? | ? |
| 28 | ?tomcat.servlet.error | ?servlet發生錯誤總數 | ? | ? | ? |
| 29 | ?tomcat.servlet.request.max | ?servlet請求最長時間 | ? | ? | ? |
| 30 | ?tomcat.threads.busy | ?tomcat繁忙線程 | 是 | ?顯示在監控頁面，據此檢查是否有線程夯住 | ? |
| 31 | ?tomcat.threads.current | ?tomcat當前線程數（包括守護線程） | 是 | ?顯示在監控頁面 | 重要 |
| 32 | ?tomcat.threads.config.max | ?tomcat配置的線程最大數 | 是 | ?顯示在監控頁面 | 重要 |
| 33 | ?tomcat.cache.access | ?tomcat讀取緩存次數 | ? | ? | ? |
| 34 | ?tomcat.cache.hit | ?tomcat緩存命中次數 | ? | ? | ? |
| ---CPU---??? | |||||
| 35 | ?system.cpu.count | ?CPU數量 | ? | ? | ? |
| 36 | ?system.load.average.1m | ?load average | 是 | ?超過閾值報警 | 重要 |
| 37 | ?system.cpu.usage | ?系統CPU使用率 | ? | ? | ? |
| 38 | ?process.cpu.usage | ?當前進程CPU使用率 | 是 | ?超過閾值報警 | ? |
| 39 | ?http.server.requests | ?http請求調用情況 | 是 | ?顯示10個請求量最大，耗時最長的URL；統計非200的請求量 | 重要 |
| 40 | ?process.uptime | ?應用已運行時間 | 是 | ?顯示在監控頁面 | ? |
| 41 | ?process.files.max | ?允許最大句柄數 | 是 | ?配合當前打開句柄數使用 | ? |
| 42 | ?process.start.time | ?應用啟動時間點 | 是 | ?顯示在監控頁面 | ? |
| 43 | ?process.files.open | ?當前打開句柄數 | 是 | ?監控文件句柄使用率，超過閾值后報警 | 重要 |
附錄
SpringBoot1.x的metrics信息
{"mem":568029,"mem.free":164376,"processors":16,"instance.uptime":223643888,"uptime":223835542,"systemload.average":0.18,"heap.committed":415232,"heap.init":419840,"heap.used":250855,"heap":415232,"nonheap.committed":156480,"nonheap.init":2496,"nonheap.used":152797,"nonheap":0,"threads.peak":114,"threads.daemon":99,"threads.totalStarted":234,"threads":113,"classes":15474,"classes.loaded":15474,"classes.unloaded":0,"gc.ps_scavenge.count":1808,"gc.ps_scavenge.time":99224,"gc.ps_marksweep.count":3,"gc.ps_marksweep.time":5314
} ?
SpringBoot2.0的metrics信息
{"names":["jvm.memory.committed","http.server.requests","jvm.buffer.memory.used","jvm.gc.memory.allocated","tomcat.sessions.created","tomcat.sessions.expired","jvm.memory.used","tomcat.global.error","jvm.gc.max.data.size","system.cpu.count","jvm.memory.max","tomcat.global.sent","jvm.buffer.total.capacity","jvm.buffer.count","process.files.max","jvm.threads.daemon","process.start.time","tomcat.sessions.active.max","tomcat.global.request.max","jvm.gc.live.data.size","process.files.open","process.cpu.usage","tomcat.threads.current","tomcat.servlet.request","jvm.gc.pause","process.uptime","tomcat.threads.busy","system.load.average.1m","tomcat.cache.hit","tomcat.global.request","tomcat.servlet.error","tomcat.servlet.request.max","tomcat.cache.access","tomcat.sessions.active.current","system.cpu.usage","jvm.threads.live","jvm.classes.loaded","jvm.classes.unloaded","jvm.threads.peak","tomcat.threads.config.max","jvm.gc.memory.promoted","tomcat.sessions.rejected","tomcat.global.received","tomcat.sessions.alive.max"]
} ?
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