Mercurial > prosody-modules

annotate mod_statistics_mem/mod_statistics_mem.lua @ 5516:f25df3af02c1

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mod_client_management: Include client software version number in listing Should you ever wish to revoke a client by version number, e.g. for security reasons affecting certain versions, then it would be good to at the very least see which version is used. Also includes the OAuth2 software ID, an optional unique identifier that should be the same for all installations of a particular software.
author Kim Alvefur <zash@zash.se>
date Sat, 03 Jun 2023 19:21:39 +0200
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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7 local tostring = tostring;
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8 local s_format = string.format;
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9 local m_floor = math.floor;
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10 local m_max = math.max;
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11 local prefixes = "kMGTPEZY";
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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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16 local m = 0;
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17 while num >= multiplier and m < #prefixes do
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18 num = num / multiplier;
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19 m = m + 1;
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20 end
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21
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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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33 local statm, err = io.open"/proc/self/statm";
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34 if statm then
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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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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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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 });