Performance
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For an overview of the different tools we use to instrument, measure, process and display performance data, see Wikimedia Performance Team#Tools on mediawiki.org.
The below is primarily a high-level overview and entry point for internal documentation and workflows relating to performance at Wikimedia.
Contents
Data
Metrics
- performance.wikimedia.org. Dashboard to view performance metrics. Including MediaWiki PHP profiling, Flame Graphs, HHVM/Xenon.
- Graphite. Primary real-time metric database. Dashboards at grafana.wikimedia.org.
- Most data comes from client-side beacons to Statsv or EventLogging, or from application servers sending messages via Statsd.
- Aggregation for Navigation Timing is done by webperf.
- Tendril. Real-time MySQL (MariaDB) analytics and performance.
Logs
- Logstash. Primary log file database. Runtime errors, warnings and notices from MediaWiki, Apache, and other servers and services. Queryable from ElasticSearch through Kibana, and the aggregated log files from the command-line on mwlog1001.
Synthetic testing
Guides
Profile MediaWiki backend requests
See X-Wikimedia-Debug for how to turn on request profiling. This will use XHProf to capture a profile and send it to XHGui.
Measure front-end performance
See Performance/Guides/Measure performance.
ResourceLoader
- ResourceLoader (mediawiki.org)
- [wikitech-l] Inspecting page performance with mw.loader.inspect(), Ori Livneh, October 2013
| Get source code of a module |
|---|
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function getSource( module ) {
var version = mw.loader.getVersion( module );
if ( !version ) {
console.warn('Unknown module: ' + module );
return false;
}
$.ajax( {
url: mw.config.get('wgLoadScript'),
dataType: 'text',
data: {
debug: true,
only: 'scripts',
modules: module,
lang: mw.config.get('wgUserLanguage'),
skin: mw.config.get('skin'),
version: version,
raw: 1
}
} ).then( function ( data ) {
console.log( data );
} );
}
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