下载Arthas的jar包
上传jar包到你的服务器启动
启动 arthas
在命令行下面执行（使用和目标进程一致的用户启动，否则可能 attach 失败）：
curl -O https://arthas.aliyun.com/arthas-boot.jar
java -jar arthas-boot.jar
执行该程序的用户需要和目标进程具有相同的权限。比如以admin用户来执行：sudo su admin && java -jar arthas-boot.jar 或 sudo -u admin -EH java -jar arthas-boot.jar。
如果 attach 不上目标进程，可以查看~/logs/arthas/ 目录下的日志。
如果下载速度比较慢，可以使用 aliyun 的镜像：java -jar arthas-boot.jar --repo-mirror aliyun --use-http
java -jar arthas-boot.jar -h 打印更多参数信息。
选择你要排查的JAVA运行的服务
监控成功就进入
找到你代码里面的耗时比较慢的接口
例如：
@PostMapping("/createOrder")
@Override
public Result<Object> createOrder(@RequestBody PreOrderBusinessOrderRequest requestBody)
执行Arthas的监控命令--监控这个接口
监控方法-----整体耗时 monitor命令
monitor -c 5 com.xxxx.cashier.payment.interfaces.service.PaymentServiceController create
监控方法-----整体耗时 monitor命令得到结果
Press Q or Ctrl+C to abort.
Affect(class count: 1 , method count: 1) cost in 835 ms, listenerId: 1
timestamp class method total success fail avg-rt(ms) fail-rate
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2024-05-14 10:50:06 com.xxxx.cashier.payment.interfaces.serv create 1 1 0 5732.03 0.00%
ice.PaymentServiceController
timestamp class method total success fail avg-rt(ms) fail-rate
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2024-05-14 10:50:15 com.xxxx.cashier.payment.interfaces.serv create 0 0 0 0.00 0.00%
ice.PaymentServiceController
监控方法-----每行执行结果耗时 trace 命令
trace com.xxxxx.cashier.payment.interfaces.service.PaymentServiceController create
监控方法-----每行执行结果耗时 trace 命令执行结果
Press Q or Ctrl+C to abort.
Affect(class count: 1 , method count: 1) cost in 178 ms, listenerId: 2
---ts=2024-05-14 10:52:27;thread_name=http-nio-8291-exec-19;id=74;is_daemon=true;priority=5;TCCL=org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader@592cb470---[6373.19803ms] com.xxxx.platform.cashier.payment.interfaces.service.PaymentServiceController:create()
+---[0.00% 0.155539ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setStateId() #38
+---[0.00% 0.020813ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getPhoneNo() #39
+---[0.00% 0.020437ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setCreator() #39
+---[0.00% 0.021332ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getUserId() #40
+---[0.00% 0.019115ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setCreatorId() #40
+---[99.99% 6372.41672ms ]com.xxxx.platform.cashier.payment.application.PaymentService:order() #43
+---[0.00% 0.027684ms ] com.xxxx.common.domain.model.Result:ok() #48
`---[0.00% 0.01374ms ] com.xxxx.common.domain.model.Result:setResponse() #49
得到结果:-[99.99% 6372.41672ms ]com.xxxx.platform.cashier.payment.application.PaymentService:order()
方法里面嵌套的这个方法调取耗时---继续追踪
[arthas@1711210]$ trace com.xxxx.platform.cashier.payment.application.impl.PaymentServiceImpl order
PaymentServiceImpl order 的耗时追踪
Press Q or Ctrl+C to abort.
Affect(class count: 2 , method count: 2) cost in 453 ms, listenerId: 3
`---ts=2024-05-14 10:54:32;thread_name=http-nio-8291-exec-22;id=77;is_daemon=true;priority=5;TCCL=org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader@592cb470
`---[5546.383883ms] com.xxxx.platform.cashier.payment.application.impl.PaymentServiceImpl$$EnhancerBySpringCGLIB$$5fc9f056:order()
`---[100.00% 5546.162384ms ] org.springframework.cglib.proxy.MethodInterceptor:intercept()
`---[99.95% 5543.406012ms ] com.xxxx.platform.cashier.payment.application.impl.PaymentServiceImpl:order()
+---[0.00% 0.037904ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getPayChannel() #83
+---[0.00% 0.01964ms ] com.xxxx.platform.cashier.domain.model.PayTypeEnum:getDesc() #85
+---[0.00% 0.030665ms ] com.xxxx.platform.cashier.payment.application.CheckCommonService:payOrderCreateCheck() #89
+---[0.00% 0.01448ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getMerchantId() #94
+---[0.05% 2.768826ms ] com.xxxx.platform.cashier.merchant.application.MerchantService:getThatMerchantNo() #96
+---[0.00% 0.03542ms ] com.xxxx.platform.cashier.merchant.domain.model.Merchant:getStatus() #98
+---[0.00% 0.014544ms ] com.xxxx.platform.cashier.merchant.domain.model.Merchant:getFee() #102
+---[0.00% 0.015929ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getAmount() #104
+---[0.00% 0.017196ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setMerchantFee() #105
+---[0.00% 0.014196ms ] com.xxxx.platform.cashier.domain.model.PaymentStatusEnum:code() #107
+---[0.00% 0.015284ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setStatus() #107
+---[0.00% 0.013615ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getUserId() #109
+---[0.00% 0.015292ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setPayerId() #109
+---[0.00% 0.017296ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getPhoneNo() #110
+---[0.00% 0.014007ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setPayerName() #110
+---[0.00% 0.011935ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getMerchantId() #112
+---[0.00% 0.013289ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getOrderNo() #112
+---[0.03% 1.53837ms ] com.xxxx.platform.cashier.common.RedisLockUtils:lock() #112
+---[0.00% 0.019698ms ] com.xxxx.platform.cashier.domain.model.TransactionTypeEnum:code() #117
+---[0.00% 0.019657ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setTransactionType() #117
+---[0.00% 0.014411ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getCurrencyType() #120
+---[0.00% 0.055756ms ] org.apache.commons.lang3.StringUtils:isEmpty() #120
+---[0.00% 0.016267ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setCurrencyType() #120
+---[0.00% 0.053548ms ] com.xxxx.platform.cashier.common.RuleCommonUilt:getOrderNoNextValue() #123
+---[0.00% 0.014304ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setPaymentNo() #123
+---[99.64% 5523.18862ms ] com.xxxx.platform.cashier.payChannel.application.WxPayService:unifiedOrderV3() #126
+---[0.00% 0.031283ms ] com.xxxx.platform.cashier.payChannel.callback.vo.WxPayRespDto:getPrepayId() #129
+---[0.00% 0.019875ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setChannelFlowNo() #130
+---[0.00% 0.014413ms ] com.xxxx.platform.cashier.payChannel.callback.vo.WxPayRespDto:getCodeUrl() #132
+---[0.00% 0.015808ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setCodeUrl() #132
+---[0.00% 0.014376ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getExpireTime() #134
+---[0.19% 10.32507ms ] com.xxxx.platform.cashier.payment.infra.persistent.PaymentRepository:save() #137
+---[0.00% 0.013414ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getMerchantId() #139
+---[0.00% 0.0138ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getOrderNo() #139
+---[0.05% 2.851317ms ] com.xxxx.platform.cashier.common.RedisLockUtils:unlock() #139
+---[0.00% 0.034698ms ] com.xxxx.platform.cashier.domain.dto.PayRespDto:<init>() #140
+---[0.00% 0.017892ms ] com.xxxx.platform.cashier.payChannel.callback.vo.WxPayRespDto:getPaymentNo() #141
+---[0.00% 0.01654ms ] com.xxxx.platform.cashier.domain.dto.PayRespDto:setPaymentNo() #141
+---[0.00% 0.01323ms ] com.xxxx.platform.cashier.payChannel.callback.vo.WxPayRespDto:getNonceStr() #142
+---[0.00% 0.0158ms ] com.xxxx.platform.cashier.domain.dto.PayRespDto:setNonceStr() #142
+---[0.00% 0.012434ms ] com.xxxx.platform.cashier.payChannel.callback.vo.WxPayRespDto:getCodeUrl() #143
+---[0.00% 0.01343ms ] com.xxxx.platform.cashier.domain.dto.PayRespDto:setCodeUrl() #143
+---[0.00% 0.01348ms ] com.xxxx.platform.cashier.payChannel.callback.vo.WxPayRespDto:getTimeStamp() #144
+---[0.00% 0.014787ms ] com.xxxx.platform.cashier.domain.dto.PayRespDto:setTimeStamp() #144
+---[0.00% 0.01276ms ] com.xxxx.platform.cashier.payChannel.callback.vo.WxPayRespDto:getSignType() #145
+---[0.00% 0.014926ms ] com.xxxx.platform.cashier.domain.dto.PayRespDto:setSignType() #145
+---[0.00% 0.014566ms ] com.xxxx.platform.cashier.domain.dto.PayRespDto:setPrepayId() #146
+---[0.00% 0.01013ms ] com.xxxx.platform.cashier.payChannel.callback.vo.WxPayRespDto:getPrepayId() #147
+---[0.00% 0.013928ms ] com.xxxx.platform.cashier.domain.dto.PayRespDto:setPackgeVal() #147
+---[0.00% 0.019242ms ] com.xxxx.platform.cashier.payChannel.callback.vo.WxPayRespDto:getPaySign() #148
`---[0.00% 0.01396ms ] com.xxxx.platform.cashier.domain.dto.PayRespDto:setPaySign() #148
PaymentServiceImpl order 的耗时追踪结果
[99.64% 5523.18862ms ] com.xxxx.platform.cashier.payChannel.application.WxPayService:unifiedOrderV3() #126
WxPayService:unifiedOrderV3() 耗时比较高---继续追踪
trace com.xxxx.platform.cashier.payChannel.handler.JsapiPrepayHandler handlePrepay
WxPayService:unifiedOrderV3() 耗时比较高---继续追踪---结果
Press Q or Ctrl+C to abort.
Affect(class count: 1 , method count: 1) cost in 270 ms, listenerId: 6
`---ts=2024-05-14 11:06:59;thread_name=http-nio-8291-exec-34;id=83;is_daemon=true;priority=5;TCCL=org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader@592cb470
`---[5495.001335ms] com.xxxx.platform.cashier.payChannel.handler.JsapiPrepayHandler:handlePrepay()
+---[0.00% 0.031287ms ] com.xxxx.platform.cashier.payChannel.application.WxConfigService:getWxConfig() #58
+---[0.24% 12.980429ms ] com.xxxx.platform.cashier.payChannel.application.WxConfigService:getWxCallBackUrl() #59
+---[0.00% 0.013296ms ] com.xxxx.platform.cashier.payChannel.application.WxConfigService:getPayChannel() #60
+---[0.00% 0.051999ms ] com.xxxx.platform.cashier.payChannel.domain.model.PayChannel:getMid() #62
+---[0.00% 0.014014ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:setPayChannelId() #62
+---[0.00% 0.01112ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayRequest:<init>() #66
+---[0.00% 0.008355ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getAppId() #68
+---[0.00% 0.007783ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayRequest:setAppid() #68
+---[0.00% 0.032611ms ] com.wechat.pay.java.core.Config:createCredential() #70
+---[0.00% 0.012989ms ] com.wechat.pay.java.core.auth.Credential:getMerchantId() #70
+---[0.00% 0.007349ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayRequest:setMchid() #70
+---[0.00% 0.007852ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getDescription() #72
+---[0.00% 0.007496ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayRequest:setDescription() #72
+---[0.00% 0.008485ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getExpireTime() #74
+---[0.00% 0.014132ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayRequest:setTimeExpire() #80
+---[0.00% 0.006621ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayRequest:setNotifyUrl() #87
+---[0.00% 0.008656ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getPaymentNo() #89
+---[0.00% 0.00741ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayRequest:setOutTradeNo() #89
+---[0.00% 0.008734ms ] com.wechat.pay.java.service.payments.jsapi.model.Amount:<init>() #91
+---[0.00% 0.007847ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getAmount() #92
+---[0.00% 0.008955ms ] com.wechat.pay.java.service.payments.jsapi.model.Amount:setTotal() #92
+---[0.00% 0.007979ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getCurrencyType() #93
+---[0.00% 0.006736ms ] com.wechat.pay.java.service.payments.jsapi.model.Amount:setCurrency() #93
+---[0.00% 0.008146ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayRequest:setAmount() #94
+---[0.00% 0.005114ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getPaymentNo() #96
+---[0.00% 0.008387ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getOrderNo() #96
+---[0.00% 0.007641ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayRequest:setAttach() #96
+---[0.00% 0.00908ms ] com.wechat.pay.java.service.payments.jsapi.model.Payer:<init>() #98
+---[0.00% 0.007556ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getOpenId() #100
+---[0.00% 0.007754ms ] com.wechat.pay.java.service.payments.jsapi.model.Payer:setOpenid() #100
+---[0.00% 0.013363ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayRequest:setPayer() #101
+---[0.00% 0.008127ms ] com.xxxx.platform.cashier.domain.model.CashierPayment:getClientIp() #103
+---[0.00% 0.024896ms ] org.apache.commons.lang3.StringUtils:isNotBlank() #103
+---[0.00% 0.00985ms ] com.wechat.pay.java.service.payments.jsapi.JsapiServiceExtension$Builder:<init>() #109
+---[0.00% 0.008498ms ] com.wechat.pay.java.service.payments.jsapi.JsapiServiceExtension$Builder:config() #111
+---[0.00% 0.008683ms ] com.wechat.pay.java.service.payments.jsapi.JsapiServiceExtension$Builder:signType() #112
+---[0.00% 0.184347ms ] com.wechat.pay.java.service.payments.jsapi.JsapiServiceExtension$Builder:build() #113
+---[99.73% 5480.296786ms ] com.wechat.pay.java.service.payments.jsapi.JsapiServiceExtension:prepayWithRequestPayment() #115
+---[0.00% 0.031419ms ] com.wechat.pay.java.service.payments.jsapi.model.PrepayWithRequestPaymentResponse:getPackageVal() #116
+---[0.00% 0.02185ms ] org.apache.commons.lang3.StringUtils:isEmpty() #116
`---[0.00% 0.065744ms ] com.xxxx.platform.cashier.payChannel.handler.JsapiPrepayHandler:buildWxPayRespVo() #121
找到罪魁祸首 JsapiServiceExtension:prepayWithRequestPayment() 耗时全都是他
分析代码：甩锅了
