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annotate mod_measure_memory/mod_measure_memory.lua @ 3587:c24d43ababc6

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mod_storage_xmlarchive: Try harder to limit range of time to check Fixes read of entire index in case where the time range is outside the range present in the archive.
author Kim Alvefur <zash@zash.se>
date Tue, 07 May 2019 17:10:07 +0200
parents a5a5f85d7ca1
children e17c937a71b3
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2c39af0fb93b mod_measure_memory: Module for polling memory useage from Lua, meminfo() and /proc depending on availability
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1 module:set_global();
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2
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3 local measure = require"core.statsmanager".measure;
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4
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5 local measures = {};
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6 setmetatable(measures, {
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7 __index = function (t, k)
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a5a5f85d7ca1 mod_measure_memory: Use the 'amount' measure type
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8 local m = measure("amount", "memory."..k); t[k] = m; return m;
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9 end
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10 });
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11
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12 module:hook("stats-update", function ()
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13 measures.lua(collectgarbage("count")*1024);
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14 end);
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15
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16 if require"lfs".attributes("/proc/self/statm", "mode") == "file" then
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17 local pagesize = module:get_option_number("memory_pagesize", 4096); -- getconf PAGESIZE
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18
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19 module:hook("stats-update", function ()
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20 local statm, err = io.open("/proc/self/statm");
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21 if not statm then
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22 module:log("error", tostring(err));
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23 return;
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24 end
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25 -- virtual memory (caches, opened librarys, everything)
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26 measures.total(statm:read("*n") * pagesize);
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27 -- resident set size (actually used memory)
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28 measures.rss(statm:read("*n") * pagesize);
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29 statm:close();
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30 end);
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31 end