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Site-Speed Topography

CSS Wizardry

Any time you run a test with WebPageTest, you’ll get this table of different milestones and metrics. Higher variance means a less stable metric across pages. I can see from the screenshot above that TTFB is my most stable metrics—no one page appears to have particularly expensive database queries or API calls on the back-end.

Speed 328
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Ensuring the Successful Launch of Ads on Netflix

The Netflix TechBlog

We informed our engineering and business partners, including customer support, about the experiment and ramped up traffic incrementally while monitoring the success and error metrics through Lumen dashboards. We continued ramping up and eventually reached 100% replay. At this point we felt confident to run the replay traffic 24/7.

Traffic 349
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Migrating Critical Traffic At Scale with No Downtime?—?Part 1

The Netflix TechBlog

The second phase involves migrating the traffic over to the new systems in a manner that mitigates the risk of incidents while continually monitoring and confirming that we are meeting crucial metrics tracked at multiple levels. The batch job creates a high-level summary that captures some key comparison metrics.

Traffic 347
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AWS and Dynatrace automation hit the jackpot at Perform Las Vegas

Dynatrace

Across the two days, there were sixteen new sessions – delivered for the first time – based on content derived from lab exercises developed and delivered by working with Dynatrace experts and our Partner communicate to showcase Dynatrace’s newest features. Dynatrace AWS monitoring with CloudWatch metrics and metadata.

AWS 245
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How ShiftLeft Uses PostgreSQL Extension TimescaleDB

High Scalability

We have two types of time series data: metrics and vulnerability events. Metrics represent application events, and a subset of those that involve security issues are vulnerability events. Vulnerability events can also have an event sample that contains detailed information about the request that exercised a security vulnerability.

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Uplevel your gamechanging skills at Perform 2022

Dynatrace

Attendees will have the same great Dynatrace experts teaching the sessions live via webcam (and we’d highly encourage you to turn on your webcam as well), the same virtual classroom to join and complete the hands-on exercises, and the same great content.

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Interpreting A/B test results: false negatives and power

The Netflix TechBlog

We then used simple thought exercises based on flipping coins to build intuition around false positives and related concepts such as statistical significance, p-values, and confidence intervals. the difference in metric values between Groups A and B?—?the The variability of the metric in the underlying population. Sample size.

Testing 211