Struct PerformanceMetrics 

pub struct PerformanceMetrics {
    pub total_queries: u64,
    pub successful_queries: u64,
    pub failed_queries: u64,
    pub consecutive_failures: u32,
    pub avg_latency: Duration,
    pub last_success_time: Option<Instant>,
    pub last_failure_time: Option<Instant>,
    pub cdn_accuracy_score: f64,
}

上游服务器性能指标

Fields

total_queries: u64

总查询次数

successful_queries: u64

成功查询次数

failed_queries: u64

失败查询次数

consecutive_failures: u32

连续失败次数

avg_latency: Duration

平均延迟

last_success_time: Option<Instant>

最后成功时间

last_failure_time: Option<Instant>

最后失败时间

cdn_accuracy_score: f64

CDN准确性评分 (0.0-1.0)

Implementations

impl PerformanceMetrics

pub fn new() -> Self

创建新的性能指标实例

pub fn success_rate(&self) -> f64

计算成功率

pub fn failure_rate(&self) -> f64

计算失败率

pub fn is_available(&self) -> bool

是否可用（基于连续失败次数）- 修正术语，更准确描述服务器可用性

pub fn latency_grade(&self) -> &'static str

获取延迟等级描述

pub fn record_success(&mut self, latency: Duration, cdn_accurate: bool)

更新成功查询指标

pub fn record_failure(&mut self)

更新失败查询指标

pub fn reset(&mut self)

重置指标

pub fn overall_score(&self) -> f64

获取综合评分 (0.0-1.0)

Trait Implementations

impl Clone for PerformanceMetrics

fn clone(&self) -> PerformanceMetrics

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PerformanceMetrics

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for PerformanceMetrics

fn default() -> Self

Returns the “default value” for a type.