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The Speed of Time

Brendan Gregg

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. Was there some other program consuming CPU, like a misbehaving Ubuntu service that wasn't in CentOS? Colleagues/Internet I love using [Linux performance tools]. What on Earth is Ubuntu doing that results in 30% higher CPU time!?

Speed 126
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Stuff The Internet Says On Scalability For July 20th, 2018

High Scalability

Yet we still program with text—in files. He told me his work in functional programming languages failed, and would likely always fail, because it was easy to do hard things but incredibly difficult to do simple things. Hey, it's HighScalability time: World History Timeline from 3000BC to 2000AD. Do you like this sort of Stuff?

Internet 121
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The Speed of Time

Brendan Gregg

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. Was there some other program consuming CPU, like a misbehaving Ubuntu service that wasn't in CentOS? Colleagues/Internet I love using Linux performance tools. top(1) showed that only the Cassandra database was consuming CPU.

Speed 52
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The Speed of Time

Brendan Gregg

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. Was there some other program consuming CPU, like a misbehaving Ubuntu service that wasn't in CentOS? Colleagues/Internet I love using [Linux performance tools]. What on Earth is Ubuntu doing that results in 30% higher CPU time!?

Speed 40
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USENIX SREcon APAC 2022: Computing Performance: What's on the Horizon

Brendan Gregg

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. The call for participation ends on March 2nd 23:59 SGT! Ford, et al., “TCP

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This spring: High-Performance and Low-Latency C++ (Stockholm) and ACCU (Bristol)

Sutter's Mill

Tue-Thu Apr 25-27: High-Performance and Low-Latency C++ (Stockholm). On April 25-27, I’ll be in Stockholm (Kista) giving a three-day seminar on “High-Performance and Low-Latency C++.” If you’re interested in attending, please check out the links, and I look forward to meeting and re-meeting many of you there.

Latency 48
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Desktop Application Testing vs Web Application Testing

Testsigma

Some are accessed via the internet while some of them are installed on the user’s computer. Desktop Application – Desktop application is a name coined for a general program used to run on a personal computer or laptop. The Internet is the basis for these types of applications to work.

Testing 63