Mercurial > prosody-modules
annotate mod_statistics_mem/mod_statistics_mem.lua @ 1834:7bb2f149f8ec
mod_pastebin/README: Try to clarify the config differences in 0.9+
author | Kim Alvefur <zash@zash.se> |
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date | Wed, 09 Sep 2015 14:22:37 +0200 |
parents | 403d5cd924eb |
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mod_statistics_mem: Module that collects memory usage stats from /proc
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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 }); |