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annotate mod_traceback/mod_traceback.lua @ 4877:adc6241e5d16

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mod_measure_process: Report the enforced limit The soft limit is what the kernel actually enforces, while the hard limit is is how far you can change the soft limit without privileges. Unless the process dynamically adjusts the soft limit, knowing the hard limit is not as useful as knowing the soft limit. Reporting the soft limit and the number of in-use FDs allows placing alerts on expressions like 'process_open_fds / process_max_fds >= 0.95'
author Kim Alvefur <zash@zash.se>
date Tue, 18 Jan 2022 18:55:20 +0100
parents 7a4e8dbbd30d
children dde9d21a599f
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7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
Matthew Wild <mwild1@gmail.com>
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1 module:set_global();
7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
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7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
Matthew Wild <mwild1@gmail.com>
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3 local traceback = require "util.debug".traceback;
7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
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7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
Matthew Wild <mwild1@gmail.com>
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5 require"util.signal".signal(module:get_option_string(module.name, "SIGUSR1"), function ()
7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
Matthew Wild <mwild1@gmail.com>
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6 module:log("info", "Received SIGUSR1, writing traceback");
7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
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7 local f = io.open(prosody.paths.data.."/traceback.txt", "a+");
7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
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8 f:write(traceback(), "\n");
7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
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9 f:close();
7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
Matthew Wild <mwild1@gmail.com>
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10 end);
7a4e8dbbd30d mod_traceback: Write current stack trace to file on SIGUSR1
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11