【运维发布】灰度观察指标清单：新玩法的观察期指标设计

local METRICS = {
    { name = "join_rate", freq = 300, warn = 0.15 },
    { name = "err_rate", freq = 60, warn = 0.02 },
    { name = "drop_drift", freq = 1800, warn = 0.2 },
}
local function sampleMetric(m)
    local v = readMetric(m.name)
    if v > m.warn then
        setsysvarex("METRIC_WARN_" .. m.name, v, 1)
    end
end

local function gateExpansion()
    local warns = 0
    for _, m in ipairs(METRICS) do
        if tonumber(getsysvar("METRIC_WARN_" .. m.name) or "0") > 0 then
            warns = warns + 1
        end
    end
    return warns == 0
end