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How to use Server Timing to get backend transparency from your CDN

Speed Curve

Caching the base page/HTML is common, and it should have a positive impact on backend times. Key things to understand from your CDN Cache Hit/Cache Miss – Was the resource served from the edge, or did the request have to go to origin? Latency – How much time does it take to deliver a packet from A to B.

Servers 58
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Analyzing a High Rate of Paging

Brendan Gregg

This is a rough post to share this old but good case study of using these tools, and to help justify their further development. Reads usually have apps waiting on them; writes may not (write-back caching). biolatency From [bcc], this eBPF tool shows a latency histogram of disk I/O. Counting cache functions.

Cache 105
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How To Add eBPF Observability To Your Product

Brendan Gregg

biolatency Disk I/O latency histogram heat map. cachestat File system cache statistics line charts. runqlat CPU scheduler latency heat map. Here are the top ten tools you can run and present as a generic BPF observability dashboard, along with suggested visualizations: Tool Shows Visualization. opensnoop Files opened table.

Latency 145
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Analyzing a High Rate of Paging

Brendan Gregg

This is a rough post to share this old but good case study of using these tools, and to help justify their further development. Reads usually have apps waiting on them; writes may not (write-back caching). biolatency From [bcc], this eBPF tool shows a latency histogram of disk I/O. This is "cache busting."

Cache 40
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Lessons Learned Rebuilding A Large E-Commerce Website With Next.js (Case Study)

Smashing Magazine

Lessons Learned Rebuilding A Large E-Commerce Website With Next.js (Case Study). Lessons Learned Rebuilding A Large E-Commerce Website With Next.js (Case Study). To mitigate the performance issues, we had to add a lot of (unbudgeted) extra servers and had to aggressively cache pages on a reverse proxy. Jonne Kats.

Website 113
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How To Add eBPF Observability To Your Product

Brendan Gregg

biolatency Disk I/O latency histogram heat map 5. cachestat File system cache statistics line charts 7. runqlat CPU scheduler latency heat map 10. In the end, they are both good options. ## Case study: Netflix Netflix is building a new GUI that does this tool dashboard and more, based on the bpftrace versions of these tools.

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Synthetic Monitoring vs. RUM

Rigor

For example, in a case study published by Gilt Groupe , Eric Shepherd, who was formerly Gilt’s principal front end engineer, noted that: Both RUM and synthetic monitoring give different views of our performance, and are useful for different things. They each bring different – and complementary – information to the table.