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annotate mod_measure_cpu/mod_measure_cpu.lua @ 2432:47a6f01231b2

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mod_http_stats_stream: Sends statistics from statsmanager over an HTTP event stream
author Kim Alvefur <zash@zash.se>
date Wed, 04 Jan 2017 09:18:34 +0100
parents 2a4c632a24cb
children 8357cabc31f6
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2a4c632a24cb mod_measure_cpu: Collect CPU usage statistic
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1 module:set_global();
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2
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3 local measure = require"core.statsmanager".measure;
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4 local mt = require"util.multitable";
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5 local get_time = require "socket".gettime;
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6 local get_clock = os.clock;
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8 local measure_cpu_now = measure("amount", "cpu.percent"); -- Current percentage
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10 local last_cpu_wall, last_cpu_clock;
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11 module:hook("stats-update", function ()
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12 local new_wall, new_clock = get_time(), get_clock();
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13 local pc = 0;
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14 if last_cpu_wall then
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15 pc = 100/((new_wall-last_cpu_wall)/(new_clock-last_cpu_clock));
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16 end
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17 last_cpu_wall, last_cpu_clock = new_wall, new_clock;
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18
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19 measure_cpu_now(pc);
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20 end);
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21
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22 -- Some metadata for mod_munin
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23 local munin_meta = mt.new(); munin_meta.data = module:shared"munin/meta";
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24 local key = "global_cpu_amount";
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25
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26 munin_meta:set(key, "", "graph_args", "--base 1000 -r --lower-limit 0 --upper-limit 100");
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27 munin_meta:set(key, "", "graph_title", "Prosody CPU Usage");
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28 munin_meta:set(key, "", "graph_vlabel", "%");
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29 munin_meta:set(key, "", "graph_category", "cpu");
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31 munin_meta:set(key, "percent", "label", "CPU Usage");
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32 munin_meta:set(key, "percent", "min", "0");
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