Mercurial > prosody-modules

annotate mod_statistics_mem/mod_statistics_mem.lua @ 5424:b45d9a81b3da

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mod_http_oauth2: Revert role selector, going to try something else Back out f2c7bb3af600 Allowing only a single role to be encoded into the grant takes away the possibility of having multiple roles in the grant, one of which is selected when issuing an access token. It also takes away the ability to have zero roles granted, which could be useful e.g. when you only need OIDC scopes.
author Kim Alvefur <zash@zash.se>
date Sun, 07 May 2023 19:40:57 +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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Kim Alvefur <zash@zash.se>
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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 });