The document discusses tools for monitoring and analyzing the performance of eZ Publish websites. It introduces Graphite, an open-source tool for monitoring and storing time-series data, and StatsD, which collects application metrics and sends them to Graphite. It then describes eZPerformanceLogger, an eZ Publish extension that measures key performance indicators and sends the data to Graphite for visualization and analysis. A live demo is presented of using eZPerformanceLogger and Graphite to break down metrics by content classes and identify poorly performing pages.

1. Dynamic duo!
Analyzing performances of eZ Publish websites
with eZPerformanceLogger and Graphite
Gaetano Giunta | eZ Unconference | May 29 2013

2. Graphite

3. “Graphite is an enterprise-scale monitoring tool
that runs well on cheap hardware”
• Architecture
• carbon - a Twisted daemon that listens for time-series data
• whisper - a simple database library for storing time-series data (similar in design
to RRD)
• graphite webapp - A Django webapp that renders graphs on-demand using Cairo
• https://github.com/graphite-project
• http://graphite.readthedocs.org
29/5/2013PRESENTER: GAETANO GIUNTA SLIDE 3
Graphite

4. “Statsd is a simple NodeJS daemon that listens
for messages on a UDP port”
• It parses the messages, extracts metrics data, and periodically flushes the
data to graphite
• By default: every 10 seconds
• https://github.com/etsy/statsd/
• http://codeascraft.com/2011/02/15/measure-anything-measure-everything/
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Statsd

5. 29/5/2013PRESENTER: GAETANO GIUNTA SLIDE 5
Can haz graphs?

6. eZPerformanceLogger

7. • Allows the developer to define a set of variables (KPI) to be measured
• Each variable is measured for every page view
• rest / ajax pages as well
• Common KPIs are available; custom ones can be added
examples:
• Memory usage [bytes]
• Time taken [ms]
• Number of database queries executed [#]
• Time taken by database queries [ms]
• Time of longest database query [ms]
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eZ Performance Logger I
PRESENTER: GAETANO GIUNTA

8. • Measured KPIs can be sent to multiple logging systems
• csv formatted log probably the easiest to later parse
• Apache’s own access log - better suited to avoid any performance hit
• supports logging directly to Odoscope, Google Analytics or Piwik via
rewriting of html pages
• or to network servers using either udp packets or syslog protocol
• Extension does NOT come with a nice GUI of its own
• Integrates with Munin to visualize the measured data
• And - since yesterday - with Graphite as well !
• Disclaimer: only works with eZ 5 when in legacy mode
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eZ Performance Logger II
PRESENTER: GAETANO GIUNTA

9. Live demo

10. • Break down metrics reports, by content class or single node id, or ...
«average database queries per page» makes little sense when averaged
over the whole website
better: avg. number of db queries per page for content class «article»
can stack graphs, making it easy to identify a single bad behaving node
• Flexible aggregation interval – down to one second
• Flexible retention interval
• Access graphite directly from within eZ admin interface
Integration perks
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11. • Want to send alerts on critical events?
Many tools integrate with graphite
https://graphite.readthedocs.org/en/latest/tools.html
• Full installation and configuration guide is in the works
• Have more ideas? Raise your hand!
The sky’s the limit
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12. Thanks for participating!
Source code
http://projects.ez.no/ezperformancelogger
These slides (soon) on slideshare
http://www.slideshare.net/gggeek
Contacting me
gaetano.giunta@ez.no
@gggeek
http://share.ez.no/blogs/gaetano-giunta
http://projects.ez.no/users/community/gaetano_giunta
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Questions?