renzhong opened a new issue, #2660:
URL: https://github.com/apache/brpc/issues/2660
**Describe the bug (描述bug)**
mbvar 的 prometheus 的上报格式如下：
# HELP service_latency
# TYPE service_latency gauge
service_latency{valid="false"} 0
# HELP service_latency
# TYPE service_latency gauge
service_latency{valid="false",quantile="80"} 0
# HELP service_latency
# TYPE service_latency gauge
service_latency{valid="false",quantile="90"} 0
# HELP service_latency
# TYPE service_latency gauge
service_latency{valid="false",quantile="99"} 0
# HELP service_latency
# TYPE service_latency gauge
service_latency{valid="false",quantile="999"} 0
# HELP service_latency
# TYPE service_latency gauge
service_latency{valid="false",quantile="9999"} 0
# HELP service_max_latency
# TYPE service_max_latency gauge
service_max_latency{valid="false"} 0
# HELP service_qps
# TYPE service_qps gauge
service_qps{valid="false"} 0
# HELP service_count
# TYPE service_count gauge
service_count{valid="false"} 1
此时没办法通过：avg(service_latency{valid="false"}) 来获取平均耗时，因为 avg 会把所有
service_latency 求平均，包括了 p99等数值。
而 bvar 的 LatencyRecorder 通过拆分名字 latency/latency_99 避免了平均耗时的求 avg 的问题。这应该是
mbvar 的 bug 吧，没办法统计平均耗时了
**To Reproduce (复现方法)**
**Expected behavior (期望行为)**
**Versions (各种版本)**
OS:
Compiler:
brpc:
protobuf:
**Additional context/screenshots (更多上下文/截图)**
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