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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-187/">SRE Weekly Issue #187</a></h1>
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<div class="entry-date" itemprop="datePublished" >
<i class="genericon genericon-day"></i><a class="updated" href="https://sreweekly.com/sre-weekly-issue-187/">September 29, 2019</a>
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<a href="https://sreweekly.com/sre-weekly-issue-187/" title="Permalink to SRE Weekly Issue #187" class="email_only">View on sreweekly.com</a>
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<h2 style="text-align: center; font-size: 80%; color: #909090;">A message from our sponsor, VictorOps:</h2>
<p>Machine learning (ML) isn’t just a buzzword anymore — it’s affecting how we communicate, shop, live and respond to critical DevOps incidents. Grab your spot for this free webinar to learn about driving success in incident management with machine learning:</p>
<p><a href="http://try.victorops.com/sreweekly/machine-learning-webinar">http://try.victorops.com/sreweekly/machine-learning-webinar</a></p>
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<h2>Articles</h2>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.atlassian.com/incident-management/get-the-handbook" target="_blank">Atlassian Incident Management Handbook</a></div>
<div class="sreweekly-description">
<p>I <em>love</em> it when companies publish their incident management documentation! Atlassian&#8217;s offering is high-quality — both in content and production value. The Major Incident Manager Cheatsheet at the end is worth distributing to your team.</p>
<p><small>Atlassian</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://medium.com/netflix-techblog/evolving-regional-evacuation-69e6cc1d24c6?source=rss----2615bd06b42e---4" target="_blank">Evolving Regional Evacuation</a></div>
<div class="sreweekly-description">
<p>Netflix shares more about their N+1 AWS region redundancy design, and it all revolves around accurately modeling demand.</p>
<p><small>Niosha Behnam — Netflix</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://avdi.codes/simple-is-complex/" target="_blank">Simple is Complex</a></div>
<div class="sreweekly-description">
<p>Interactions between simple microservices can lead to unexpected emergent behaviors.</p>
<blockquote><p>To restate: this system is not <em>complicated</em>. But it is <em>complex</em>.</p></blockquote>
<p><small>Avdi Grimm</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://www.nytimes.com/2019/09/18/magazine/boeing-737-max-crashes.html" target="_blank">What Really Brought Down the Boeing 737 Max?</a></div>
<div class="sreweekly-description">
<blockquote><p>What we had in the two downed airplanes was a textbook failure of airmanship.</p></blockquote>
<p>While I don&#8217;t necessarily agree with the blame-laden language of this article, it provides some interesting new details. It strikes me that, while MCAS may not be directly responsible for the crashes, it made it significantly harder to recover from contemporaneous pilot errors.</p>
<p><small>William Langewiesche — The New York Times</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://thenewstack.io/observability-a-3-year-retrospective/" target="_blank">Observability — A 3-Year Retrospective</a></div>
<div class="sreweekly-description">
<p>My favorite part is the role-playing scenarios of debugging a problem with observability tooling and traditional tools.</p>
<p><small>Charity Majors</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://dzone.com/articles/tcp-out-of-memory-consider-tuning-tcp-mem" target="_blank">TCP: Out of Memory — Consider Tuning TCP_Mem</a></div>
<div class="sreweekly-description">
<p>Tuning your TCP stack is important on busy servers.</p>
<p><small>Ram Lakshmanan</small></p>
</div>
</div>
<h2>Outages</h2>
<ul class="sreweekly-outages">
<li><a href="https://status.cloud.google.com/incident/google-stackdriver/19007#19007003">Google Cloud Platform</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">This incident primarily affected the control plane of many GCP services. It stemmed from a cascading failure in an important key-value store used by all of them.</li>
</ul>
</li>
<li><a href="https://economictimes.indiatimes.com/magazines/panache/a-friday-blackout-for-facebook-social-network-down-in-the-uk-instagram-suffers-outage-too/articleshow/71346312.cms">Facebook and Instagram</a></li>
<li><a href="https://kymkemp.com/2019/09/28/google-maps-server-is-down/">Google Maps</a></li>
<li><a href="https://babblesports.com/tech/godaddy-down-most-of-the-users-from-united-states-hit-by-the-outage/">GoDaddy</a></li>
<li><a href="https://footwearnews.com/2019/business/retail/target-stores-website-app-down-technical-issues-outage-1202845470/">Target (retailer)</a></li>
<li><a href="https://discord.statuspage.io/incidents/gtvzqy8b2plz">Discord</a></li>
<li><a href="https://status.fastly.com/incidents/91rq8b4ncwbx">Fastly</a>
<ul class="sreweekly-outage">
<li class="sreweekly-outage">Plus <a href="https://status.fastly.com/incidents/twl0lvhqvs5g">two</a> <a href="https://status.fastly.com/incidents/5dyxxhtsw05v">others</a>.</li>
</ul>
</li>
<li><a href="https://status.squarespace.com/incidents/40r1b6f2zks5">Squarespace</a></li>
<li><a href="https://www.githubstatus.com/incidents/b54zv9nz8m01">GitHub</a></li>
</ul>
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