# Metrics
更直接（希望更好）的统计导出方式。
## 相关配置
在基础配置中增加 metrics
```json
"metrics": {
"tag": "Metrics",
"listen": "127.0.0.1:11111"
}
```
> `tag`: string
metrics 对应的出站代理 tag, 通过设置任意门入站+路由将任意门指向此出站即可通过该任意门访问。
> `listen`: string
更简单的方法，直接监听一个地址端口提供服务。
设置该字段时若 tag 为空会自动设置为 `Metrics`, 如果二者均未设置核心会启动失败。
## 使用方法
### pprof
访问 `http://127.0.0.1:11111/debug/pprof/` 或者使用 go tool pprof 进行调试。
反馈内存占用过多/内存泄露问题需要提供 `/debug/pprof/heap` 的文件
### expvars
访问 `http://127.0.0.1:11111/debug/vars`
包含的变量:
* `stats` 包括所有的 inbound outbound user 数据
* `observatory` 包含了 observatory 观测结果
例如在 [luci-app-xray](https://github.com/yichya/luci-app-xray) 你可以得到这样的输出 (省略了 cmdline 和 memstats 等标准expvar内容)
点击查看
```json
{
"observatory": {
"tcp_outbound": {
"alive": true,
"delay": 782,
"outbound_tag": "tcp_outbound",
"last_seen_time": 1648477189,
"last_try_time": 1648477189
},
"udp_outbound": {
"alive": true,
"delay": 779,
"outbound_tag": "udp_outbound",
"last_seen_time": 1648477191,
"last_try_time": 1648477191
}
},
"stats": {
"inbound": {
"api": {
"downlink": 0,
"uplink": 0
},
"dns_server_inbound_5300": {
"downlink": 14286,
"uplink": 5857
},
"http_inbound": {
"downlink": 74460,
"uplink": 10231
},
"https_inbound": {
"downlink": 0,
"uplink": 0
},
"metrics": {
"downlink": 6327,
"uplink": 1347
},
"socks_inbound": {
"downlink": 19925615,
"uplink": 5512
},
"tproxy_tcp_inbound": {
"downlink": 4739161,
"uplink": 1568869
},
"tproxy_udp_inbound": {
"downlink": 0,
"uplink": 2608142
}
},
"outbound": {
"blackhole_outbound": {
"downlink": 0,
"uplink": 0
},
"direct": {
"downlink": 97714548,
"uplink": 3234617
},
"dns_server_outbound": {
"downlink": 7116,
"uplink": 2229
},
"manual_tproxy_outbound_tcp_1": {
"downlink": 0,
"uplink": 0
},
"manual_tproxy_outbound_udp_1": {
"downlink": 0,
"uplink": 0
},
"tcp_outbound": {
"downlink": 23873238,
"uplink": 1049595
},
"udp_outbound": {
"downlink": 639282,
"uplink": 74634
}
},
"user": {}
}
}
```
点击查看
```
xray:
name: 'xray'
update_every: 2
url: 'http://127.0.0.1:11111/debug/vars'
collect_memstats: false
extra_charts:
- id: 'inbounds'
options:
name: 'inbounds'
title: 'Xray System Inbounds'
units: bytes
family: xray
context: xray.inbounds
chart_type: line
lines:
- expvar_key: stats.inbound.tproxy_tcp_inbound.downlink
id: 'tcp.downlink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.inbound.tproxy_udp_inbound.downlink
id: 'udp.downlink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.inbound.http_inbound.downlink
id: 'http.downlink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.inbound.https_inbound.downlink
id: 'https.downlink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.inbound.socks_inbound.downlink
id: 'socks.downlink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.inbound.tproxy_tcp_inbound.uplink
id: 'tcp.uplink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.inbound.tproxy_udp_inbound.uplink
id: 'udp.uplink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.inbound.http_inbound.uplink
id: 'http.uplink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.inbound.https_inbound.uplink
id: 'https.uplink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.inbound.socks_inbound.uplink
id: 'socks.uplink'
algorithm: incremental
expvar_type: int
- id: 'outbounds'
options:
name: 'outbounds'
title: 'Xray System Outbounds'
units: bytes
family: xray
context: xray.outbounds
chart_type: line
lines:
- expvar_key: stats.outbound.tcp_outbound.downlink
id: 'tcp.downlink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.outbound.udp_outbound.downlink
id: 'udp.downlink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.outbound.direct.downlink
id: 'direct.downlink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.outbound.tcp_outbound.uplink
id: 'tcp.uplink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.outbound.udp_outbound.uplink
id: 'udp.uplink'
algorithm: incremental
expvar_type: int
- expvar_key: stats.outbound.direct.uplink
id: 'direct.uplink'
algorithm: incremental
expvar_type: int
- id: 'observatory'
options:
name: 'observatory'
title: 'Xray Observatory Metrics'
units: milliseconds
family: xray
context: xray.observatory
chart_type: line
lines:
- expvar_key: observatory.tcp_outbound.delay
id: tcp
expvar_type: int
- expvar_key: observatory.udp_outbound.delay
id: udp
expvar_type: int
```