Mercurial > prosody-modules
annotate mod_measure_process/mod_measure_process.lua @ 4938:bc8832c6696b
upstream merge
author | Goffi <goffi@goffi.org> |
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date | Wed, 11 May 2022 12:44:32 +0200 |
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mod_measure_process: Provide metrics about the process itself
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1 module:set_global() |
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2 |
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3 local get_cpu_time = os.clock |
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4 |
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5 local custom_metric = require "core.statsmanager".metric |
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6 local cpu_time = custom_metric( |
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7 "counter", "process_cpu", "seconds", |
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8 "CPU time used by Prosody as reported by clock(3)." |
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9 ):with_labels() |
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10 |
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11 local lfs = require "lfs" |
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12 |
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13 module:hook("stats-update", function () |
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14 cpu_time:set(get_cpu_time()) |
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15 end); |
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16 |
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17 if lfs.attributes("/proc/self/statm", "mode") == "file" then |
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18 local pagesize = module:get_option_number("memory_pagesize", 4096); -- getconf PAGESIZE |
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19 |
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20 local vsz = custom_metric( |
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21 "gauge", "process_virtual_memory", "bytes", |
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22 "Virtual memory size in bytes." |
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23 ):with_labels() |
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24 local rss = custom_metric( |
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25 "gauge", "process_resident_memory", "bytes", |
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26 "Resident memory size in bytes." |
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27 ):with_labels() |
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28 |
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29 module:hook("stats-update", function () |
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30 local statm, err = io.open("/proc/self/statm"); |
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31 if not statm then |
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32 module:log("error", tostring(err)); |
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33 return; |
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34 end |
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35 -- virtual memory (caches, opened librarys, everything) |
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36 vsz:set(statm:read("*n") * pagesize); |
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37 -- resident set size (actually used memory) |
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38 rss:set(statm:read("*n") * pagesize); |
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39 statm:close(); |
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40 end); |
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41 end |
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42 |
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43 if lfs.attributes("/proc/self/fd", "mode") == "directory" then |
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44 local open_fds = custom_metric( |
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45 "gauge", "process_open_fds", "", |
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46 "Number of open file descriptors." |
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47 ):with_labels() |
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48 |
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49 local has_posix, posix = pcall(require, "util.pposix") |
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50 local max_fds |
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51 if has_posix then |
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52 max_fds = custom_metric( |
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53 "gauge", "process_max_fds", "", |
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54 "Maximum number of open file descriptors" |
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55 ):with_labels() |
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56 else |
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57 module:log("warn", "not reporting maximum number of file descriptors because mod_posix is not available") |
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58 end |
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59 |
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60 local function limit2num(limit) |
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61 if limit == "unlimited" then |
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62 return math.huge |
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63 end |
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64 return limit |
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65 end |
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66 |
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67 module:hook("stats-update", function () |
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68 local count = 0 |
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69 for _ in lfs.dir("/proc/self/fd") do |
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70 count = count + 1 |
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71 end |
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72 open_fds:set(count) |
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73 |
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74 if has_posix then |
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75 local ok, soft, hard = posix.getrlimit("NOFILE") |
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76 if ok then |
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77 max_fds:set(limit2num(soft or hard)); |
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78 end |
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79 end |
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80 end); |
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81 end |