[GitHub] [apisix] ryan4yin commented on issue #7919: bug: P99 latency is too high

[GitBox <gi...@apache.org>]

ryan4yin commented on issue #7919:
URL: https://github.com/apache/apisix/issues/7919#issuecomment-1247559041

   > 1. The sample is so small that you can reproduce the sample.
   > 2. Is there a prometheus exporter that visits http://127.0.0.1:9091/apisix/prometheus/metrics to get the metrics when the flame chart is sampled?
   > 3. From the latency monitoring, APISIX causes high latency, you can remove the `proxy-mirror` plugin and keep only `prometheus` plugin, and test again?
   
   1. I'm trying to reproduce this in a test environment
   2. I tried several times to sample a cpu flame chart, I post some of them below.
   3. I disabled the `proxy-mirror` plugin, but it's helpless, the P99 latency is still high.
   
   the flame chart smapled 16mins ago, all the cpu flame chart seems the same:
   
   <img width="1455" alt="image" src="https://user-images.githubusercontent.com/22363274/190312062-959f5803-fad7-4a67-9425-51c8394ad381.png">
   
   but the lua exectution flame chart shows some new info:
   
   <img width="1496" alt="image" src="https://user-images.githubusercontent.com/22363274/190312183-5aac1efe-bbc1-48c9-9277-d2de631fda87.png">
   
   


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