【运维发布】监控大盘：开服首日的核心指标看板

-- 监控采集：分钟快照
local player = class(actor)
local function snapshotMetrics(player)
    local ts = os.date("%H:%M")
    local snap = "online=" .. (getsysvar("MOnline") or 0) ..
        ",reg=" .. (getsysvar("MReg") or 0) ..
        ",pay=" .. (getsysvar("MPay") or 0) ..
        ",err=" .. (getsysvar("MErr") or 0)
    setsysvarex("Dash_" .. ts, snap, true)
    setsysvarex("MReg", 0, true)
    setsysvarex("MPay", 0, true)
    setsysvarex("MErr", 0, true)
end

-- 阈值告警：双线变色
local player = class(actor)
local function checkAlerts(errCnt, totalReq, online, planOnline)
    local errRate = totalReq > 0 and errCnt / totalReq * 100 or 0
    if errRate > 5 then
        sendcentermsg(player, 255, 0, "【红色告警】错误率 " ..
            string.format("%.1f", errRate) .. "%，请值班立即排查！", 0, 10)
    elseif errRate > 3 then
        sendmsg(player, 1, 0, "【黄色提醒】错误率 " .. string.format("%.1f", errRate) .. "%。")
    end
    if math.abs(online - planOnline) / planOnline > 0.2 then
        sendmsg(player, 1, 0, "【偏离提醒】在线数偏离预估曲线两成以上。")
    end
end