Mercurial > prosody-modules

annotate mod_statistics_mem/mod_statistics_mem.lua @ 6556:7477e97a9045

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mod_firewall: Apply pre-reload state before re-reading config This change makes load/reload a bit more robust. module.load() runs before module.restore() and it reads from the config and updates the state (if needed). However, after this, module.restore() could run and apply the old state again.
author Matthew Wild <mwild1@gmail.com>
date Sun, 24 May 2026 20:03:20 +0100
parents 403d5cd924eb
children
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403d5cd924eb mod_statistics_mem: Module that collects memory usage stats from /proc
Kim Alvefur <zash@zash.se>
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1 -- Probably Linux-specific memory statistics
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2
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3 module:set_global();
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4
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5 local human;
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6 do
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Kim Alvefur <zash@zash.se>
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7 local tostring = tostring;
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Kim Alvefur <zash@zash.se>
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8 local s_format = string.format;
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Kim Alvefur <zash@zash.se>
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9 local m_floor = math.floor;
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10 local m_max = math.max;
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Kim Alvefur <zash@zash.se>
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11 local prefixes = "kMGTPEZY";
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Kim Alvefur <zash@zash.se>
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12 local multiplier = 1024;
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13
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14 function human(num)
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15 num = tonumber(num) or 0;
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Kim Alvefur <zash@zash.se>
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16 local m = 0;
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Kim Alvefur <zash@zash.se>
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17 while num >= multiplier and m < #prefixes do
403d5cd924eb mod_statistics_mem: Module that collects memory usage stats from /proc
Kim Alvefur <zash@zash.se>
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18 num = num / multiplier;
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Kim Alvefur <zash@zash.se>
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19 m = m + 1;
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20 end
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21
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Kim Alvefur <zash@zash.se>
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22 return s_format("%0."..m_max(0,3-#tostring(m_floor(num))).."f%sB",
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23 num, m > 0 and (prefixes:sub(m,m) .. "i") or "");
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24 end
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25 end
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26
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27
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28 local pagesize = 4096; -- according to getpagesize()
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29 module:provides("statistics", {
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30 statistics = {
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31 memory_total = { -- virtual memory
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32 get = function ()
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Kim Alvefur <zash@zash.se>
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33 local statm, err = io.open"/proc/self/statm";
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34 if statm then
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Kim Alvefur <zash@zash.se>
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35 local total = statm:read"*n";
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36 statm:close();
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37 return total * pagesize;
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38 else
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39 module:log("debug", err);
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40 end
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41 end;
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42 tostring = human;
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43 };
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Kim Alvefur <zash@zash.se>
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44 memory_rss = { -- actual in-memory data size
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45 get = function ()
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46 local statm, err = io.open"/proc/self/statm";
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47 if statm then
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Kim Alvefur <zash@zash.se>
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48 statm:read"*n"; -- Total size, ignore
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49 local rss = statm:read"*n";
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50 statm:close();
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51 return rss * pagesize;
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52 else
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53 module:log("debug", err);
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54 end
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55 end;
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56 tostring = human;
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57 };
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58 }
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59 });