Mercurial > prosody-modules

annotate mod_log_slow_events/README.markdown @ 5400:71766a4a7322

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
mod_http_oauth2: Reduce line count of metadata construction More compact and readable than long if-then chains
author Kim Alvefur <zash@zash.se>
date Tue, 02 May 2023 16:14:22 +0200
parents d276bf3f0464
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2896
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
1 ---
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
2 labels:
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
3 - 'Stage-Stable'
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
4 summary: Log warning when event handlers take too long
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
5 ...
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
6
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
7 Introduction
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
8 ============
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
9
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
10 Most activities in Prosody take place within our built-in events framework, for
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
11 example stanza processing and HTTP request handling, authentication, etc.
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
12
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
13 Modules are able to execute code when an event occurs, and they should return
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
14 as quickly as possible. Poor performance (e.g. slow or laggy server) can be caused
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
15 by event handlers that are slow to respond.
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
16
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
17 This module is able to monitor how long each event takes to be processed, and
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
18 logs a warning if an event takes above a certain amount of time, including
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
19 providing any details about the event such as the user or stanza that triggered it.
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
20
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
21 The aim is to help debug why a server may not be as responsive as it should be,
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
22 and ultimately which module is to blame for that.
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
23
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
24 Configuration
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
25 ======================
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
26
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
27 There is a single configuration option:
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
28
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
29 ```
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
30 -- Set the number of seconds an event may take before
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
31 -- logging a warning (fractional values are ok)
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
32 log_slow_events_threshold = 0.5
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
33 ```
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
34
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
35 Metrics
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
36 =======
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
37
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
38 In addition to the log messages, a new 'slow_events' metric will be exported to
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
39 your configured stats backend (if any).
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
40
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
41 Compatibility
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
42 -------------
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
43
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
44 ------- --------------
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
45 trunk Works
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
46 0.10 Works
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
47 0.9 Doesn't work
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48 0.8 Doesn't work
d276bf3f0464 mod_log_slow_events: Add README
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
49 ------- --------------