Software / code / prosody-modules
Annotate
mod_log_events_by_memory/README.markdown @ 3955:017f60608fc8
mod_smacks: also count outgoing MAM messages
mod_smacks doesn't count outgoing MAM messages, which causes warnings in Prosody such as:
> The client says it handled 41 new stanzas, but we only sent 2
It seems mod_smacks is in the wrong here and that it's too strict in trying to determine what is a valid stanza to count.
In RFC6120:
> Definition of XML Stanza: An XML stanza is the basic unit of meaning
> in XMPP. A stanza is a first-level element (at depth=1 of the stream)
> whose element name is "message", "presence", or "iq" and whose
> qualifying namespace is 'jabber:client' or 'jabber:server'.
| author | JC Brand <jc@opkode.com> |
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| date | Thu, 26 Mar 2020 11:57:02 +0100 |
| parent | 3618:f781a90018f4 |
| rev | line source |
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3615
5fe34e5f9829
mod_log_events_by_memory: Log events where Lua memory usage increased
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
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1 This module compares the memory usage reported by Lua before and after |
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mod_log_events_by_memory: Log events where Lua memory usage increased
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
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2 each event and reports it to the log if it exceeds the configuration |
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5fe34e5f9829
mod_log_events_by_memory: Log events where Lua memory usage increased
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
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3 setting `log_memory_threshold` (in bytes). |
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mod_log_events_by_memory: Log events where Lua memory usage increased
Kim Alvefur <zash@zash.se>
parents:
diff
changeset
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4 |
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5fe34e5f9829
mod_log_events_by_memory: Log events where Lua memory usage increased
Kim Alvefur <zash@zash.se>
parents:
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5 ``` lua |
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mod_log_events_by_memory: Log events where Lua memory usage increased
Kim Alvefur <zash@zash.se>
parents:
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6 log_memory_threshold = 20*1024 |
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mod_log_events_by_memory: Log events where Lua memory usage increased
Kim Alvefur <zash@zash.se>
parents:
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7 ``` |
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Kim Alvefur <zash@zash.se>
parents:
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8 |
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3618
f781a90018f4
mod_log_events_by_memory: Add link to post explaining different kinds of memory leaks
Kim Alvefur <zash@zash.se>
parents:
3617
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9 If you are looking to identify memory leaks, please first read [Three |
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f781a90018f4
mod_log_events_by_memory: Add link to post explaining different kinds of memory leaks
Kim Alvefur <zash@zash.se>
parents:
3617
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10 kinds of memory |
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mod_log_events_by_memory: Add link to post explaining different kinds of memory leaks
Kim Alvefur <zash@zash.se>
parents:
3617
diff
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11 leaks](https://blog.nelhage.com/post/three-kinds-of-leaks/). |
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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
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12 |
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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
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13 Prosody runs on Lua which uses automatic memory management with garbage |
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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
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14 collection, so the numbers reported by this module are very likely to be |
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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
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15 useless for the purpose of identifying memory leaks. Large, but |
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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
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16 temporary, increases in memory usage can however highlight other kinds |
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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
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17 of performance problems and sometimes even provide hits for where to |
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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
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18 look for memory leaks. |
