mod_measure_lua/mod_measure_lua.lua
author Jonas Schäfer <jonas@wielicki.name>
Sat, 29 May 2021 12:12:17 +0200
changeset 4582 d95fcde6e39d
child 4605 3c3f45241317
permissions -rw-r--r--
mod_measure_lua: add openmetrics-spirited way to collect lua memory use In the spirit of separate collectors found in other Prometheus packages, this is a separate module to collect metrics related to the lua stack itself.
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module:set_global()
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local custom_metric = require "core.statsmanager".metric
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local gc_bytes = custom_metric(
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	"gauge", "lua_heap", "bytes",
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	"Memory used by objects under control of the Lua garbage collector"
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):with_labels()
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module:hook("stats-update", function ()
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	local kbytes = collectgarbage("count");
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  gc_bytes:set(kbytes * 1024);
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end);
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