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<h1 class="entry-title" itemprop="headline" ><a href="https://sreweekly.com/sre-weekly-issue-480/">SRE Weekly Issue #480</a></h1>
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<i class="genericon genericon-day"></i><a class="updated" href="https://sreweekly.com/sre-weekly-issue-480/">June 8, 2025</a>
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<p><a class="email_only" href="https://sreweekly.com/sre-weekly-issue-480/">View on sreweekly.com</a></p>
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<h2 style="text-align: center; font-size: 80%; color: #909090;">A message from our sponsor, <a href="https://pagerduty.com/">PagerDuty</a>:</h2>
<p>🔍 Notable PagerDuty shift: Full incident management now spans all paid tiers. The upgraded Slack-first and Teams-first experience means fewer tools to juggle during incidents. Only leveraging PagerDuty for basic alerting? Time to check out what’s newly available in your plan!</p>
<p><a href="https://fnf.dev/4dZ5V36">https://fnf.dev/4dZ5V36</a></p>
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<div class="sreweekly-title"><a href="https://surfingcomplexity.blog/2025/05/04/you-cant-prevent-your-last-outage-no-matter-how-hard-you-try/" target="_blank" rel="noopener">You can’t prevent your last outage, no matter how hard you try</a></div>
<div class="sreweekly-description">
<blockquote>
<p>the idea that the highest ROI for risk reduction work is in the highest severity incidents is not a fact, it’s a hypothesis that simply isn’t supported by data. </p>
</blockquote>
<p>&nbsp;&nbsp;<small>Lorin Hochstein</small></p>
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<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://uptimelabs.io/is-fewer-incidents-always-good/" target="_blank" rel="noopener">Is Fewer Incidents Always Good?</a></div>
<div class="sreweekly-description">
<p>Incidents are bad, so should we try to have fewer of them? This article challenges the assumptions contained within that goal and suggests other ways to frame one&#8217;s thinking.</p>
<p>&nbsp;&nbsp;<small>Hamed Silatani &mdash; Uptime Labs.</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.palark.com/prometheus-resource-consumption-optimization/" target="_blank" rel="noopener">Understanding and optimizing resource consumption in Prometheus</a></div>
<div class="sreweekly-description">
<p>This guide goes deeply into the details of how Prometheus uses memory, and then it shows you how to get a handle on it.</p>
<p>&nbsp;&nbsp;<small>Vladimir Guryanov &mdash; Palark</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://engineering.mercari.com/en/blog/entry/20250515-from-dns-failures-to-resilience-how-nodelocal-dnscache-saved-the-day/" target="_blank" rel="noopener">From DNS Failures to Resilience: How NodeLocal DNSCache Saved the Day</a></div>
<div class="sreweekly-description">
<blockquote>
<p>This article discusses the DNS-related challenges encountered at Mercari on our Kubernetes clusters and the significant improvements achieved by implementing Node-Local DNS Cache.</p>
</blockquote>
<p>&nbsp;&nbsp;<small>Satyadarshi Sanu &mdash; Mercari</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://dev.to/narendars/distributed-consensus-paxos-vs-raft-and-modern-implementations-2gng" target="_blank" rel="noopener">Paxos vs. Raft and Modern Implementations</a></div>
<div class="sreweekly-description">
<blockquote>
<p>In this post we&#8217;ll explore the fundamentals of distributed consensus, compare the dominant consensus algorithms Paxos and Raft, and examine recent implementations like Kafka Raft.</p>
</blockquote>
<p>&nbsp;&nbsp;<small>Narendra Reddy Sanikommu &mdash; DEV</small></p>
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</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://aws.amazon.com/blogs/architecture/improving-platform-resilience-at-cash-app/" target="_blank" rel="noopener">Improving platform resilience at Cash App</a></div>
<div class="sreweekly-description">
<p>A discussion of two techniques the folks at Cash App used to improve their reliability: adopting a two-cluster topology with Kubernetes, and using Amazon&#8217;s Fault Injection Service to simulate the failure of an availability zone.</p>
<p>&nbsp;&nbsp;<small>Dustin Ellis, Deepak Garg, Ben Apprederisse, Jan Zantinge, and Rachel Sheikh &mdash; Amazon</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.readyset.io/identifying-cacheable-queries-using-tools-like-pt-query-digest-or-the-mysql-sys-schema-to-pinpoint-queries-that-would-benefit-from-caching/" target="_blank" rel="noopener">Identifying Cacheable Queries: Using tools like pt-query-digest or the MySQL sys schema to pinpoint queries that would benefit from caching</a></div>
<div class="sreweekly-description">
<p>Reading this one taught me a couple of techniques I wasn&#8217;t aware of for finding queries in need of optimization in MySQL.</p>
<p>&nbsp;&nbsp;<small>Vinicius Grippa &mdash; Readyset</small></p>
</div>
</div>
<div class="sreweekly-entry">
<div class="sreweekly-title"><a href="https://blog.railway.com/p/incident-report-june-6-2025" target="_blank" rel="noopener">Incident Report: June 6th, 2025</a></div>
<div class="sreweekly-description">
<p>Ouch &mdash; and a great learning opportunity for all of us:</p>
<blockquote>
<p>When our backend circuit breakers triggered, aggressive websocket reconnect logic initiated on every connected client at once, further overwhelming an already stressed database.</p>
</blockquote>
<p>&nbsp;&nbsp;<small>Jake Cooper &mdash; Railway</small></p>
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