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The Speed of Time

Brendan Gregg

Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? The CentOS flame graph: The Ubuntu flame graph: Darn, they didn't work.

Speed 126
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Crucial Redis Monitoring Metrics You Must Watch

Scalegrid

Key metrics like throughput, request latency, and memory utilization are essential for assessing Redis health, with tools like the MONITOR command and Redis-benchmark for latency and throughput analysis and MEMORY USAGE/STATS commands for evaluating memory. These metrics can be easily visualized using Grafana for a more user-friendly display.

Metrics 130
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article thumbnail

The Speed of Time

Brendan Gregg

Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? Microbenchmark os::javaTimeMillis() on both systems.

Speed 52
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5.5 mm in 1.25 nanoseconds

Randon ASCII

It was a lot of fun, and the work was appreciated, so a few months before the console shipped I got a present from the leadership of the project – an entire silicon wafer of Xbox 360 CPUs! Back in the day I wrote a lot of benchmarks in order to look for places where the actual performance of the CPU didn’t match what we expected.

Cache 126
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How to use Server Timing to get backend transparency from your CDN

Speed Curve

Looking at the industry benchmarks for US retailers , four well-known sites have backend times that are approaching – or well beyond – that threshold. Pagespeed Benchmarks - US Retail - LCP When you examine a waterfall, it's pretty obvious that TTFB is the long pole in the tent, pushing out render times for the page.

Servers 57
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The Surprising Effectiveness of Non-Overlapping, Sensitivity-Based Performance Models

John McCalpin

This was a keynote presentation at the “2nd International Workshop on Performance Modeling: Methods and Applications” (PMMA16), June 23, 2016, Frankfurt, Germany (in conjunction with ISC16 ). This data is from the 2007 presentation.

article thumbnail

The Speed of Time

Brendan Gregg

Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? The CentOS flame graph: The Ubuntu flame graph: Darn, they didn't work.

Speed 40