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annotate mod_debug_traceback/README.markdown @ 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 5841d54cb6c6
children
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5841d54cb6c6 mod_debug_traceback: Descendent of mod_traceback with some additional features
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1 ---
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2 labels:
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3 - 'Stage-Alpha'
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4 summary: Generate tracebacks on-demand
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5 ---
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7 # Introduction
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9 This module writes out a traceback to a file when a chosen signal (by default
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10 `SIGUSR1`) is received. It can be useful to diagnose cases where Prosody is
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11 unresponsive.
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13 # Configuration
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15 `debug_traceback_filename`
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16 : The name of the file to write the traceback to. Some variables
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17 are supported, see [mod_log_ringbuffer] docs for more info. Defaults
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18 to `{paths.data}/traceback-{pid}-{count}.log`.
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20 `debug_traceback_signal`
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21 : The name of the signal to listen for. Defaults to `SIGUSR1`.
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23 # Compatibility
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25 Prosody 0.11 or later.