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<!DOCTYPE html>
<html lang="en"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<h1>Monitoring</h1>
<p>Monitoring tools capture, analyze and display information for a web
application's execution. Every application has issues arise throughout
all levels of the web stack. Monitoring tools provide transparency so
developers and operations teams can respond and fix problems.</p>
<h2>Why is monitoring necessary?</h2>
<p>Capturing and analyzing data about your production environment is critical
to proactively deal with stability, performance, and errors in a web
application.</p>
<h2>Monitoring layers</h2>
<p>There are several important resources to monitor on the operating system
and network level of a web stack.</p>
<ol>
<li>CPU utilization</li>
<li>Memory utilization</li>
<li>Persistence storage consumed versus free</li>
<li>Network bandwidth and latency</li>
</ol>
<p>Application level monitoring encompasses several aspects. The amount of time
and resources dedicated to each aspect will vary based on whether an
application is read-heavy, write-heavy, or subject to rapid swings in traffic.</p>
<ol>
<li>Application warnings and errors (500-level HTTP errors)</li>
<li>Application code performance</li>
<li>Template rendering time</li>
<li>Browser rendering time for the application</li>
<li>Database querying performance</li>
</ol>
<h2>Monitoring Third Party Services</h2>
<ul>
<li>
<p><a href="http://newrelic.com/">New Relic</a>. Application and database monitoring as
well as plug ins for capturing and analyzing additional data about tools in
your stack.</p>
</li>
<li>
<p><a href="http://copperegg.com/">CopperEgg</a> is lower-level monitoring on server and
infrastructure. It's popular with DevOps shops that are making changes to
their production environments and want immediate feedback on the results
of those modifications.</p>
</li>
<li>
<p><a href="http://status.io/">Status.io</a> focuses on uptime and response metrics
transparency for your users.</p>
</li>
<li>
<p><a href="http://www.pagerduty.com/">PagerDuty</a> alerts a designated person or group
if there are stability, performance, or uptime issues with an application.</p>
</li>
</ul>
<h2>Open Source Monitoring Projects</h2>
<ul>
<li>
<p><a href="https://github.com/etsy/statsd/">statsd</a> is a node.js network daemon that
listens for metrics and aggregates them for transfer into another service
such as Graphite.</p>
</li>
<li>
<p><a href="https://graphite.readthedocs.org/en/latest/overview.html">Graphite</a> stores
time-series data and displays them in graphs through a Django web application.</p>
</li>
<li>
<p><a href="http://github.hubspot.com/bucky/">Bucky</a> measures the performance of a
web application from end user's browsers and sends that data back to the
server for collection.</p>
</li>
<li>
<p><a href="http://sensuapp.org/">Sensu</a> is an open source monitoring framework
written in Ruby but applicable to any programming language web application.</p>
</li>
<li>
<p><a href="http://vimeo.github.io/graph-explorer/">Graph Explorer</a> by Vimeo is a
Graphite-based dashboard with added features and a slick design.</p>
</li>
</ul>
<h2>Monitoring Resources</h2>
<ul>
<li>
<p><a href="http://www.paperplanes.de/2011/1/5/the_virtues_of_monitoring.html">The Virtues of Monitoring</a></p>
</li>
<li>
<p><a href="http://blog.docker.io/2013/07/effortless-monitoring-with-collectd-graphite-and-docker/">Effortless Monitoring with collectd, Graphite, and Docker</a></p>
</li>
<li>
<p><a href="http://matt.aimonetti.net/posts/2013/06/26/practical-guide-to-graphite-monitoring/">Practical Guide to StatsD/Graphite Monitoring</a>
is a detailed guide with code examples for monitoring infrastructure.</p>
</li>
<li>
<p>Bit.ly describes the
"<a href="http://word.bitly.com/post/74839060954/ten-things-to-monitor">10 Things They Forgot to Monitor</a>"
beyond the standard metrics such as disk & memory usage.</p>
</li>
<li>
<p><a href="http://aarvik.dk/four-linux-server-monitoring-and-management-tools/">Four Linux server monitoring tools</a></p>
</li>
<li>
<p><a href="https://blog.serverdensity.com/how-to-design-useful-monitoring-graphs-and-visualizations/">How to design useful monitoring and graphing visualizations</a></p>
</li>
</ul>
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How do I monitor my app and task queues with logging?
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How do I automate the server configuration I've set up?
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<div class="panel-heading"><h3 class="panel-head">Monitoring</h3></div>
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<a href="/">Full Stack Python</a> is an open source book explaining
each layer of the Python web application stack along with the
best Python resources from around the web.
<hr/>
<a href="http://twitter.com/mattmakai">Matt Makai</a> designed and
wrote this site with assistance from community pull
requests. If you're on GitHub you can
<a href="https://github.com/makaimc">follow him</a>
to see what daily changes are made or
<a href="https://github.com/makaimc/fullstackpython.github.com">star the repository</a> for future reference.
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<h3 class="panel-head">Table of Contents</h3>
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<a href="/introduction.html" class="list-group-item smaller-item ">Introduction</a>
<a href="/bottle.html" class="list-group-item smaller-item ">Bottle</a>
<a href="/deployment.html" class="list-group-item smaller-item ">Deployment</a>
<a href="/other-web-frameworks.html" class="list-group-item smaller-item ">Other Web Frameworks</a>
<a href="/servers.html" class="list-group-item smaller-item ">Servers</a>
<a href="/web-frameworks.html" class="list-group-item smaller-item ">Web Frameworks</a>
<a href="/django.html" class="list-group-item smaller-item ">Django</a>
<a href="/operating-systems.html" class="list-group-item smaller-item ">Operating Systems</a>
<a href="/flask.html" class="list-group-item smaller-item ">Flask</a>
<a href="/web-servers.html" class="list-group-item smaller-item ">Web Servers</a>
<a href="/platform-as-a-service.html" class="list-group-item smaller-item ">Platform-as-a-service</a>
<a href="/databases.html" class="list-group-item smaller-item ">Databases</a>
<a href="/wsgi-servers.html" class="list-group-item smaller-item ">WSGI Servers</a>
<a href="/application-dependencies.html" class="list-group-item smaller-item ">Application Dependencies</a>
<a href="/cascading-style-sheets.html" class="list-group-item smaller-item ">Cascading Style Sheets</a>
<a href="/javascript.html" class="list-group-item smaller-item ">JavaScript</a>
<a href="/static-content.html" class="list-group-item smaller-item ">Static Content</a>
<a href="/source-control.html" class="list-group-item smaller-item ">Source Control</a>
<a href="/caching.html" class="list-group-item smaller-item ">Caching</a>
<a href="/task-queues.html" class="list-group-item smaller-item ">Task Queues</a>
<a href="/api-integration.html" class="list-group-item smaller-item ">API Integration</a>
<a href="/no-sql-datastore.html" class="list-group-item smaller-item ">NoSQL Data Stores</a>
<a href="/web-application-security.html" class="list-group-item smaller-item ">Web Security</a>
<a href="/logging.html" class="list-group-item smaller-item ">Logging</a>
<a href="/monitoring.html" class="list-group-item smaller-item active">Monitoring</a>
<a href="/configuration-management.html" class="list-group-item smaller-item ">Configuration Management</a>
<a href="/web-analytics.html" class="list-group-item smaller-item ">Web Analytics</a>
<a href="/best-python-resources.html" class="list-group-item smaller-item ">Best Python Resources</a>
<a href="/about-author.html" class="list-group-item smaller-item ">About the Author</a>
<a href="/change-log.html" class="list-group-item smaller-item ">Change Log</a>
<a href="/future-directions.html" class="list-group-item smaller-item ">Future Directions</a>
</div>
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<a href="http://www.mattmakai.com/" class="underline">Matt Makai</a>
2014
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