Spring boot 系统出现请求卡顿缓慢排查解决方案

系统出现请求卡顿缓慢，使用jstack，jmap，jstat都没查看到问题

写一个切面，切controller service dao mapper层，看是哪层出现问题，在具体排查

切面代码

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;import java.lang.reflect.Method;
import java.util.Arrays;@Aspect
@Component
public class TimingAspect {private final Logger LOGGER = LoggerFactory.getLogger(this.getClass());@Pointcut("execution(* com.company..controller..*.*(..)) || " +"execution(* com.company..service..*.*(..)) || " +"execution(* com.company..mapper..*.*(..)) || " +"execution(* com.company..dao..*.*(..))")public void performancePointcut() {}@Around("performancePointcut()")public Object aroundAdvice(ProceedingJoinPoint joinPoint) throws Throwable {long start = System.currentTimeMillis();Object result = joinPoint.proceed(); // 继续执行拦截的方法long finish = System.currentTimeMillis();MethodSignature signature = (MethodSignature) joinPoint.getSignature();Method method = signature.getMethod();String methodName = joinPoint.getSignature().toString();String className = joinPoint.getTarget().getClass().getName();LOGGER.info("执行类" + className + " 执行方法："+methodName + "请求参数"+Arrays.toString(joinPoint.getArgs()) +" 方法耗时：" + (finish - start) + "ms");return result;}}

查看日志，配合jstack线程栈 看哪个方法最耗时长。