Mercurial > prosody-modules
annotate mod_http_stats_stream/README.markdown @ 4877:adc6241e5d16
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 | bac3dae031ee |
| children |
| rev | line source |
|---|---|
| 2480 | 1 --- |
| 2 depends: | |
| 3 - 'mod\_http' | |
| 4 provides: | |
| 5 - http | |
| 6 --- | |
| 7 | |
| 8 # Introduction | |
| 9 | |
| 10 This module provides a streaming interface to [Prosodys internal statistics][doc:statistics] via | |
| 11 [Server-sent events](https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events). | |
| 12 | |
| 13 ## Example | |
| 14 | |
| 15 ```js | |
| 16 var evtSource = new EventSource("/stats_stream"); | |
| 17 | |
| 18 /* | |
| 19 * An event with all current statistics in the form of a JSON object. | |
| 20 * Normally sent only once, when first connected to the stream. | |
| 21 */ | |
| 22 evtSource.addEventListener("stats-full", function(e) { | |
| 23 var initial_stats = JSON.parse(e.data); | |
| 24 console.log(initial_stats); | |
| 25 }, false); | |
| 26 | |
| 27 /* | |
| 28 * An event containing only statistics that have changed since the last | |
| 29 * 'stats-full' or 'stats-updated' event. | |
| 30 */ | |
| 31 evtSource.addEventListener("stats-updated", function(e) { | |
| 32 var updated_stats = JSON.parse(e.data); | |
| 33 console.log(updated_stats); | |
| 34 }, false); | |
| 35 ``` | |
| 36 | |
|
3643
740870196b97
mod_http_stats_stream: Make global to simplify
Kim Alvefur <zash@zash.se>
parents:
2480
diff
changeset
|
37 # Compatibility |
| 2480 | 38 |
|
4595
bac3dae031ee
Add note of incompatibility with trunk since 5f15ab7c6ae5
Kim Alvefur <zash@zash.se>
parents:
3643
diff
changeset
|
39 * Prosody \>= 0.11.0 |
|
bac3dae031ee
Add note of incompatibility with trunk since 5f15ab7c6ae5
Kim Alvefur <zash@zash.se>
parents:
3643
diff
changeset
|
40 * Trunk < [5f15ab7c6ae5](https://hg.prosody.im/trunk/rev/5f15ab7c6ae5) |