【数据存储】行为日志分级采样：存储成本与排查价值的平衡

local SAMPLE = { trade = 100, fight = 10, move = 1 }
local counters = {}
local function writeLog(kind, text)
    local rate = SAMPLE[kind] or 10
    counters[kind] = (counters[kind] or 0) + 1
    if counters[kind] % 100 > rate - 1 then
        return false
    end
    setsysvar("LOG_LAST_" .. kind, os.date("%H:%M:%S") .. "|" .. text)
    return true
end

local function forceLog(kind, text)
    setsysvarex("LOG_KEY_" .. os.date("%H%M"), text, 1)
    writeLog(kind, "[FORCED]" .. text)
end