prosody-modules: mod_log_events_by_memory/README.markdown annotate

annotate mod_log_events_by_memory/README.markdown @ 4537:53ee391ca689

mod_smacks: Fix traceback due to session being destroyed in send() Sending something can cause the OS to notice that the connection is dead and then the connection can be dead at this point. More likely if opportunistic_writes is enabled.

author	Kim Alvefur <zash@zash.se>
date	Thu, 01 Apr 2021 11:35:26 +0200
parents	f781a90018f4
children

rev	line source
3615 5fe34e5f9829 mod_log_events_by_memory: Log events where Lua memory usage increased Kim Alvefur <zash@zash.se> parents: diff changeset	1 This module compares the memory usage reported by Lua before and after
5fe34e5f9829 mod_log_events_by_memory: Log events where Lua memory usage increased Kim Alvefur <zash@zash.se> parents: diff changeset	2 each event and reports it to the log if it exceeds the configuration
5fe34e5f9829 mod_log_events_by_memory: Log events where Lua memory usage increased Kim Alvefur <zash@zash.se> parents: diff changeset	3 setting `log_memory_threshold` (in bytes).
5fe34e5f9829 mod_log_events_by_memory: Log events where Lua memory usage increased Kim Alvefur <zash@zash.se> parents: diff changeset	4
5fe34e5f9829 mod_log_events_by_memory: Log events where Lua memory usage increased Kim Alvefur <zash@zash.se> parents: diff changeset	5 ``` lua
5fe34e5f9829 mod_log_events_by_memory: Log events where Lua memory usage increased Kim Alvefur <zash@zash.se> parents: diff changeset	6 log_memory_threshold = 20*1024
5fe34e5f9829 mod_log_events_by_memory: Log events where Lua memory usage increased Kim Alvefur <zash@zash.se> parents: diff changeset	7 ```
5fe34e5f9829 mod_log_events_by_memory: Log events where Lua memory usage increased Kim Alvefur <zash@zash.se> parents: diff changeset	8
3618 f781a90018f4 mod_log_events_by_memory: Add link to post explaining different kinds of memory leaks Kim Alvefur <zash@zash.se> parents: 3617 diff changeset	9 If you are looking to identify memory leaks, please first read [Three
f781a90018f4 mod_log_events_by_memory: Add link to post explaining different kinds of memory leaks Kim Alvefur <zash@zash.se> parents: 3617 diff changeset	10 kinds of memory
f781a90018f4 mod_log_events_by_memory: Add link to post explaining different kinds of memory leaks Kim Alvefur <zash@zash.se> parents: 3617 diff changeset	11 leaks](https://blog.nelhage.com/post/three-kinds-of-leaks/).
f781a90018f4 mod_log_events_by_memory: Add link to post explaining different kinds of memory leaks Kim Alvefur <zash@zash.se> parents: 3617 diff changeset	12
3617 61b9c89db212 mod_log_events_by_memory: Add a rant to README about uselessness of this module Kim Alvefur <zash@zash.se> parents: 3615 diff changeset	13 Prosody runs on Lua which uses automatic memory management with garbage
61b9c89db212 mod_log_events_by_memory: Add a rant to README about uselessness of this module Kim Alvefur <zash@zash.se> parents: 3615 diff changeset	14 collection, so the numbers reported by this module are very likely to be
61b9c89db212 mod_log_events_by_memory: Add a rant to README about uselessness of this module Kim Alvefur <zash@zash.se> parents: 3615 diff changeset	15 useless for the purpose of identifying memory leaks. Large, but
61b9c89db212 mod_log_events_by_memory: Add a rant to README about uselessness of this module Kim Alvefur <zash@zash.se> parents: 3615 diff changeset	16 temporary, increases in memory usage can however highlight other kinds
61b9c89db212 mod_log_events_by_memory: Add a rant to README about uselessness of this module Kim Alvefur <zash@zash.se> parents: 3615 diff changeset	17 of performance problems and sometimes even provide hits for where to
61b9c89db212 mod_log_events_by_memory: Add a rant to README about uselessness of this module Kim Alvefur <zash@zash.se> parents: 3615 diff changeset	18 look for memory leaks.