Spring靴执行器-最大性能

Question

我正在使用Spring引导执行器依赖来获得应用的洞察力。为此，我使用了Spring Boot Admin。客户机-服务器的配置工作正常。我必须测量将要执行的endpoint的计数，总时间，最大值。

uri:/user/asset/getAllAssets
TOTAL_TIME: 831ms
MAX: 0ms 

uri:/user/getEmployee/{employeeId}
TOTAL_TIME: 98ms
MAX: 0ms

为什么MAX（time）是0，而total_time:是Xms

当我执行泛化表单时

 {
        "name": "http.server.requests",
        "description": null,
        "baseUnit": "seconds",
        "measurements": [
            {
                "statistic": "COUNT",
                "value": 597
            },
            {
                "statistic": "TOTAL_TIME",
                "value": 144.9057076
            },
            {
                "statistic": "MAX",
                "value": 3.0002913
            }
        ],
        "availableTags": [
            {
                "tag": "exception",
                "values": [
                    "None"
                ]
            },
            {
                "tag": "method",
                "values": [
                    "GET"
                ]
            },
            {
                "tag": "uri",
                "values": [
                    "/actuator/metrics/{requiredMetricName}",
                    "/**/favicon.ico",
                    "/actuator",
                    "/user/getEmployee/{employeeId}",
                    "/user/asset/getAllAssets",
                    "/actuator/health",
                    "/actuator/info",
                    "/actuator/env/{toMatch}",
                    "/actuator/metrics",
                    "/**"
                ]
            },
            {
                "tag": "outcome",
                "values": [
                    "CLIENT_ERROR",
                    "SUCCESS"
                ]
            },
            {
                "tag": "status",
                "values": [
                    "404",
                    "200"
                ]
            }
        ]
    }

localhost:8889/actuator/metrics/http.server.requests？tag=uri://user/getemployee/2

响应404（在请求致动器之前，我已执行/user/getemployee/2）

localhost:8889/actuator/metrics/http.server.requests？tag=uri://user/getemployee/{employeeId}

localhost:8889/actuator/metrics/http.server.requests？tag=uri://user/asset/getallassets

{
    "name": "http.server.requests",
    "description": null,
    "baseUnit": "seconds",
    "measurements": [
        {
            "statistic": "COUNT",
            "value": 1
        },
        {
            "statistic": "TOTAL_TIME",
            "value": 0.8311609
        },
        {
            "statistic": "MAX",
            "value": 0
        }
    ],
    "availableTags": [
        {
            "tag": "exception",
            "values": [
                "None"
            ]
        },
        {
            "tag": "method",
            "values": [
                "GET"
            ]
        },
        {
            "tag": "outcome",
            "values": [
                "SUCCESS"
            ]
        },
        {
            "tag": "status",
            "values": [
                "200"
            ]
        }
    ]
}

localhost:8889/actuator/metrics/http.server.requests

{
    "name": "http.server.requests",
    "description": null,
    "baseUnit": "seconds",
    "measurements": [
        {
            "statistic": "COUNT",
            "value": 3346
        },
        {
            "statistic": "TOTAL_TIME",
            "value": 559.7992767999998
        },
        {
            "statistic": "MAX",
            "value": 2.3612968
        }
    ],

Answer 1

max度量是一个滚动的max。因此它表示滚动窗口中的最大测量值。

例如，如果您每分钟都要整理度量：

          Total    Count   Max
Minute 1    100        1   100  
Minute 2    500      101    90
Minute 3   4500     1000    10
Minute 4   4500     1000     0

在第1分钟，您有一个请求，总共100ms，所以平均持续时间是100ms，最慢（最大）是100ms

看第4分钟，总数和计数没有增加，因为没有请求。因为没有请求，所以不可能有“最慢”的请求，这就是为什么MAX是0。