Mercurial > prosody-modules

annotate mod_log_slow_events/README.markdown @ 4362:116c88c28532

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
mod_http_admin_api: restructure group-related info in API - Return the members of the group right in the get_group_by_id call. This is an O(1) of extra work. - Remove the groups attribute from get_user_by_name as that is O(n) of work and rarely immediately needed. The replacement for the group membership information in the user is for now to use the group API and iterate; future work may fix that.
author Jonas Schäfer <jonas@wielicki.name>
date Wed, 20 Jan 2021 15:30:29 +0100
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 ------- --------------