Brendan Gregg

SEPTEMBER 25, 2021

As (C) looked like a kernel rebuild, I started with (D) and (E). ## 6. I also rewrote this in C and called gettimeofday(2) directly: $ cat gettimeofdaybench.c html [60s checklist]: /Articles/Netflix_Linux_Perf_Analysis_60s.pdf [re:Invent talk]: [link] [recommendation]: [link] [Nitro]: /blog/2017-11-29/aws-ec2-virtualization-2017.html

Speed 40

Speed Java AWS Virtualization 40

Brendan Gregg

SEPTEMBER 5, 2021

I summarized this case study at [Kernel Recipes] in 2017; it is an old story that's worth resharing here. ## 1. The other colors are yellow for C++, and red for other user-level code.) The default size is 128 Kbytes, and people shouldn't be tuning below 8 Kbytes. A microservice team asked me for help with a mysterious issue.

Cache 40

Cache Cloud Code Java 40

Randon ASCII

APRIL 17, 2018

When you own all of the code then this may involve some back of the envelope estimates, competitive benchmarking, or intuition tuned by experience. It shouldn’t take much C# code to make an app that monitors the root of all drives, using buffer sizes that start small and gradually get larger. You know where to find me.

Monitoring 43

Monitoring C++ Code Processing 43

SQL Performance

SEPTEMBER 2, 2021

I’ve written several articles about this function (and STRING_AGG, which arrived in SQL Server 2017) since this post was written: Performance Surprises and Assumptions : STRING_SPLIT(). He spent a lot of time fine-tuning this CLR function to efficiently parse a string. all_columns AS c WHERE EXISTS. ( WHERE Item = c.

C++ 46

C++ Servers Testing Performance 46

John McCalpin

JANUARY 22, 2018

A peculiar throughput limitation on Intel’s Xeon Phi x200 (Knights Landing) Introduction: In December 2017, my colleague Damon McDougall (now at AMD) asked for help in porting the fused multiply-add example code from a Colfax report ( [link] ) to the Xeon Phi x200 (Knights Landing) processors here at TACC.

Latency 40

Latency Hardware Code Testing 40

John McCalpin

JANUARY 22, 2018

Introduction: In December 2017, my colleague Damon McDougall (now at AMD) asked for help in porting the fused multiply-add example code from a Colfax report ( [link] ) to the Xeon Phi x200 (Knights Landing) processors here at TACC. of the “adjusted peak performance”, there is no longer a significant upside to performance tuning.

Latency 40

Latency Hardware Code Testing 40

Percona

JANUARY 14, 2019

To simulate text messages I have used ~3 billion of reddit comments (10 years from 2007 to 2017), downloaded from pushshift.io. This is all true for ClickHouse, however, we may be able to live with it for our task. Vadim published a blog post about analyzing reddit comments with ClickHouse. compose','xamarin','markdown','scrum','comic'] ?

Database 48

Database Analytics Blockchain Healthcare 48