HammerDB

NOVEMBER 5, 2018

If you are new to running Oracle, SQL Server, MySQL and PostgreSQL TPC-C workloads with HammerDB and have needed to investigate I/O performance the chances are that you have experienced waits on writing to the Redo, Transaction Log or WAL depending on the database you are testing. A good example of how tuning is an iterative process.

Benchmarking 40

Benchmarking Database C++ Virtualization 40

Rigor

JANUARY 13, 2020

When it comes to web content, you can easily find what you need through many different paths, from search engines and social media to playlists and blogs, jumping from one source to another with just a tap of a finger. Web Performance Tuning. Even Faster Websites. High Performance Mobile Web. Designing for Performance.

Performance 75

Performance Social Media Website Website Performance 75

Brendan Gregg

FEBRUARY 9, 2018

Many thanks to the engineers working hard to develop workarounds to these processor bugs. In this post I'll look at the Linux kernel page table isolation (KPTI) patches that workaround Meltdown: what overheads to expect, and ways to tune them. Hit Ctrl-C to end. Much of my testing was on Linux 4.14.11 and 4.14.12

Performance 75

Performance Benchmarking Cache Tuning 75

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 I happened to be speaking at a technical confering while still debugging this, and mentioned what I was working on to a processor engineer. include <sys/time.h>

Speed 40

Speed Java AWS Virtualization 40

HammerDB

OCTOBER 12, 2018

This post complements the previous best practice guides this time with the focus on MySQL and MariaDB and achieving top levels of performance with the HammerDB MySQL TPC-C test. As is also the case this limitation is at the database level (especially the storage engine) rather than the hardware level. order by c. perf special.

Best Practices 40

Best Practices Scalability Performance C++ 40

Brendan Gregg

FEBRUARY 8, 2018

Many thanks to the engineers working hard to develop workarounds to these processor bugs. In this post I'll look at the Linux kernel page table isolation (KPTI) patches that workaround Meltdown: what overheads to expect, and ways to tune them. Hit Ctrl-C to end. Much of my testing was on Linux 4.14.11 and 4.14.12

Performance 40

Performance Benchmarking Cache Tuning 40

John McCalpin

JANUARY 22, 2018

Hardware performance counter results for a simple benchmark code calling Intel’s optimized DGEMM implementation for this processor (from the Intel MKL library) show that about 20% of the dynamic instruction count consists of instructions that are not packed SIMD operations (i.e., An illustrative example: .

Latency 40

Latency Hardware Code Testing 40

SQL Server According to Bob

JANUARY 11, 2020

Character POS ASCII Value Formula Value A 1 65 67 C 2 67 69 Checksum 136 Comparing ​​ the checksum values indicates ​​ that the values do not match and ​​ damage ​​ has occurred to the data. log in Mdbdata or Dsadata). The transaction is then committed to the Jet database.

Servers 40

Servers Cache Database Media 40

High Scalability

NOVEMBER 25, 2019

This is a guest post by Kalpesh Patel , an Engineer, who for Egnyte from home. Keep it simple: New engineers join every month so the goal is to have them productive from week one - a simple architecture ensures easy induction. A fairly distributed engineering team at the start but now gravitating mostly in Mountain View, Poland, India.

Architecture 52

Architecture Cache Azure Storage 52