author | Kim Alvefur <zash@zash.se> |
Wed, 03 Mar 2021 11:43:38 +0100 | |
changeset 4494 | cf2bdb2aaa57 |
parent 3622 | f781a90018f4 |
permissions | -rw-r--r-- |
3619
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 |
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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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
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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
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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
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7 |
``` |
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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8 |
|
3622
f781a90018f4
mod_log_events_by_memory: Add link to post explaining different kinds of memory leaks
Kim Alvefur <zash@zash.se>
parents:
3621
diff
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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:
3621
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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:
3621
diff
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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:
3621
diff
changeset
|
12 |
|
3621
61b9c89db212
mod_log_events_by_memory: Add a rant to README about uselessness of this module
Kim Alvefur <zash@zash.se>
parents:
3619
diff
changeset
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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:
3619
diff
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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:
3619
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:
3619
diff
changeset
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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:
3619
diff
changeset
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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:
3619
diff
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18 |
look for memory leaks. |