Mercurial > prosody-modules
diff mod_measure_lua/mod_measure_lua.lua @ 4578:d95fcde6e39d
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.
| author | Jonas Schäfer <jonas@wielicki.name> |
|---|---|
| date | Sat, 29 May 2021 12:12:17 +0200 |
| parents | |
| children | 3c3f45241317 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_measure_lua/mod_measure_lua.lua Sat May 29 12:12:17 2021 +0200 @@ -0,0 +1,13 @@ +module:set_global() + +local custom_metric = require "core.statsmanager".metric +local gc_bytes = custom_metric( + "gauge", "lua_heap", "bytes", + "Memory used by objects under control of the Lua garbage collector" +):with_labels() + +module:hook("stats-update", function () + local kbytes = collectgarbage("count"); + gc_bytes:set(kbytes * 1024); +end); +