jujiale opened a new issue, #7108: URL: https://github.com/apache/apisix/issues/7108
### Description hello, I want to reset the prometheus metrics in some situations while I use prometheus plugin，what I want is when I reset the metrics，then I invoke http://127.0.0.1:9092/apisix/prometheus/metrics， the response is the same as when I restart apisix and first invoke http://127.0.0.1:9092/apisix/prometheus/metrics. I add a control api in prometheus.lua，the api finally invoke the method like below: ` local function metrics_flush() local dict = ngx.shared["prometheus-metrics"] dict.flush_all(dict) dict.flush_expired(dict) end ` but when I invoke my reset control api， then I send a request mate the route, then I invoke http://127.0.0.1:9092/apisix/prometheus/metrics，the result sometimes like A, sometimes like B, sometimes like C, the A,B,C like below A: ` apisix_bandwidth{type="egress",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215"} 1003 apisix_bandwidth{type="ingress",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215"} 519 apisix_http_latency_bucket{type="apisix",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="0.05"} 1 apisix_http_latency_bucket{type="apisix",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="0.15"} 1 apisix_http_latency_bucket{type="apisix",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="0.5"} 1 apisix_http_latency_bucket{type="apisix",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="0.75"} 1 apisix_http_latency_bucket{type="apisix",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="1"} 1 apisix_http_latency_bucket{type="apisix",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="+Inf"} 1 apisix_http_latency_bucket{type="request",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="0.5"} 1 apisix_http_latency_bucket{type="request",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="0.75"} 1 apisix_http_latency_bucket{type="request",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="1"} 1 apisix_http_latency_bucket{type="request",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="+Inf"} 1 apisix_http_latency_bucket{type="upstream",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="0.5"} 1 apisix_http_latency_bucket{type="upstream",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="0.75"} 1 apisix_http_latency_bucket{type="upstream",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="1"} 1 apisix_http_latency_bucket{type="upstream",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215",le="+Inf"} 1 apisix_http_latency_count{type="apisix",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215"} 1 apisix_http_latency_count{type="request",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215"} 1 apisix_http_latency_count{type="upstream",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215"} 1 apisix_http_latency_sum{type="apisix",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215"} 8.2015991220707e-08 apisix_http_latency_sum{type="request",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215"} 0.48900008201599 apisix_http_latency_sum{type="upstream",route="399831007143920568",service="401146765056672696",consumer="",node="18.215.122.215"} 0.489 apisix_http_status{code="200",route="399831007143920568",matched_uri="/get*",matched_host="",service="401146765056672696",consumer="",node="18.215.122.215"} ` B ` apisix_etcd_modify_indexes{key="consumers"} 0 apisix_etcd_modify_indexes{key="global_rules"} 4968 apisix_etcd_modify_indexes{key="max_modify_index"} 82435 apisix_etcd_modify_indexes{key="prev_index"} 82749 apisix_etcd_modify_indexes{key="protos"} 0 apisix_etcd_modify_indexes{key="routes"} 82435 apisix_etcd_modify_indexes{key="services"} 71976 apisix_etcd_modify_indexes{key="ssls"} 0 apisix_etcd_modify_indexes{key="stream_routes"} 0 apisix_etcd_modify_indexes{key="upstreams"} 71975 apisix_etcd_modify_indexes{key="x_etcd_index"} 82752 apisix_etcd_reachable 1 apisix_nginx_http_current_connections{state="accepted"} 65 apisix_nginx_http_current_connections{state="active"} 3 apisix_nginx_http_current_connections{state="handled"} 65 apisix_nginx_http_current_connections{state="reading"} 0 apisix_nginx_http_current_connections{state="total"} 69 apisix_nginx_http_current_connections{state="waiting"} 2 apisix_nginx_http_current_connections{state="writing"} 1 apisix_node_info{hostname="ksshuat01218"} 1 ` C: resut is A and B **what I find is that the result A is the metrics that linked request. the result B is the metrics that is none of business of request,such as "apisix_etcd_modify_indexes"** I want to know how I can reset metrics, or if I has some error in flush dict ### Environment - APISIX version (run `apisix version`):v2.11 - Operating system (run `uname -a`):Linux 3.10.0-957.21.3.el7.x86_64 - OpenResty / Nginx version (run `openresty -V` or `nginx -V`):openresty/1.19.9.1 - etcd version, if relevant (run `curl http://127.0.0.1:9090/v1/server_info`):3.5.0 - APISIX Dashboard version, if relevant: - Plugin runner version, for issues related to plugin runners: - LuaRocks version, for installation issues (run `luarocks --version`): -- This is an automated message from the Apache Git Service. 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