Mercurial > prosody-modules
view mod_log_slow_events/README.markdown @ 3570:8a93af85f319
mod_muc_cloud_notify: Count codepoints instead of bytes
Still marked as a 'TODO' in XEP-0372, but Converse.js is
counting codepoints, and rough consensus is that this is
the easiest approach in the widest range of environments.
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 02 May 2019 20:43:05 +0100 |
parents | d276bf3f0464 |
children |
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--- labels: - 'Stage-Stable' summary: Log warning when event handlers take too long ... Introduction ============ Most activities in Prosody take place within our built-in events framework, for example stanza processing and HTTP request handling, authentication, etc. Modules are able to execute code when an event occurs, and they should return as quickly as possible. Poor performance (e.g. slow or laggy server) can be caused by event handlers that are slow to respond. This module is able to monitor how long each event takes to be processed, and logs a warning if an event takes above a certain amount of time, including providing any details about the event such as the user or stanza that triggered it. The aim is to help debug why a server may not be as responsive as it should be, and ultimately which module is to blame for that. Configuration ====================== There is a single configuration option: ``` -- Set the number of seconds an event may take before -- logging a warning (fractional values are ok) log_slow_events_threshold = 0.5 ``` Metrics ======= In addition to the log messages, a new 'slow_events' metric will be exported to your configured stats backend (if any). Compatibility ------------- ------- -------------- trunk Works 0.10 Works 0.9 Doesn't work 0.8 Doesn't work ------- --------------