HammerDB

JUNE 27, 2022

HammerDB is a software application for database benchmarking. Databases are highly sophisticated software, and to design and run a fair benchmark workload is a complex undertaking. The Transaction Processing Performance Council (TPC) was founded to bring standards to database benchmarking, and the history of the TPC can be found here.

Benchmarking 63

Benchmarking Open Source C++ Cache 63

SQL Performance

APRIL 8, 2019

Back on December 5, 2017, Microsoft announced that they were using AMD EPYC 7551 processors in their storage-optimized Lv2-Series virtual machines. I wrote about using CPU-Z to benchmark the Intel Xeon E5-2673 v3 processor in an Azure VM in this article. Figure 1: CPU-Z Benchmark Results for LS16v2. 10 x 1.9TB NVMe SSD.

Azure 42

Azure Virtualization Storage Benchmarking 42

HammerDB

APRIL 27, 2021

This will show the benchmark options dialog. Benchmark Options. and benchmark set with the bm argument. In the example below we have modified the SQL Server, number of warehouses to build and the virtual users to build them. A key aspect is being able to visualise the multithreaded nature of the Virtual Users.

Virtualization 74

Virtualization Benchmarking Database Operating System 74

The Morning Paper

MAY 27, 2019

The work includes changes to the CHERI ISA, the C compiler, the C language runtime, the virtual memory APIs, and the CheriBSD kernel. On a context switch the kernel saves and restores user-thread register capability state, and updates virtual-physical mappings. For a macro-benchmark PostgreSQL’s initdb tool was used.

C++ 61

C++ Hardware Virtualization Benchmarking 61

Percona

APRIL 12, 2023

Though still not “profitable” by many benchmarks, it’s a lot closer to being so, perhaps in a big way.) That early decision was notable because whereas the GPL is applied if derivative work is distributed, the AGPL license applies both for distributed work and whenever end users interact with a program over a network.

Open Source 98

Open Source Programming Database Servers 98

HammerDB

MARCH 25, 2023

It will create the number of virtual users to the number of CPUs on the system where HammerDB is running. using existing tables (188,416 KB) SETTING CONFIGURATION Database set to MariaDB Benchmark set to TPC-C for MariaDB. scripts/tcl/maria/tprocc/maria_tprocc.sh TMP/hammer.DB TMP/hammer.DB TMP/hammer.DB TMP/hammer.DB TMP/hammer.DB

C++ 84

C++ Virtualization Benchmarking Database 84

Alex Russell

APRIL 29, 2021

As an engineer on a browser team, I'm privy to the blow-by-blow of various performance projects, benchmark fire drills, and the ways performance marketing (deeply) impacts engineering priorities. With each team, benchmarks lost are understood as bugs. Provides support for "unread counts", e.g. for email and chat programs.

Media 145

Media Games Education Engineering 145

Brendan Gregg

MARCH 16, 2024

It was also a virtual machine that lacked low-level hardware profiling capabilities, so I wasn't able to do cycle analysis to confirm that the 10% was entirely frame pointer-based. Having done this before, it reminds me of CSS programming: you make a little change here and everything breaks, and you spend hours chasing your own tail.

Java 137

Java Cache Google Hardware 137

Brendan Gregg

SEPTEMBER 25, 2021

CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. Was there some other program consuming CPU, like a misbehaving Ubuntu service that wasn't in CentOS? Note that Ubuntu also has a frame to show entry into vDSO (virtual dynamic shared object). Running this on the two systems saw similar results.

Speed 52

Speed Java AWS Virtualization 52

HammerDB

NOVEMBER 30, 2018

Programming Languages. When you download the source code for HammerDB you can see that the programming language it is written in is called TCL. As virtual users are started the database specific packages and workload specific modules are loaded into the virtual user threads. Virtual Users. program in TCL. #!/usr/local/bin/tclsh8.6

Architecture 40

Architecture Virtualization Open Source C++ 40

Percona

SEPTEMBER 1, 2023

It is essentially a set of instructions or a program that is executed automatically in response to specific events or actions occurring within the database. Testing and Benchmarking : Thoroughly test triggers in a staging environment to evaluate their impact on performance. What is a Trigger in MySQL? KiB in the table cache, 611.12

Cache 75

Cache Database Games Healthcare 75

Brendan Gregg

SEPTEMBER 25, 2021

CLI tools The Cassandra systems were EC2 virtual machine (Xen) instances. Was there some other program consuming CPU, like a misbehaving Ubuntu service that wasn't in CentOS? Note that Ubuntu also has a frame to show entry into vDSO (virtual dynamic shared object). include <sys/time.h>

Speed 40

Speed Java AWS Virtualization 40

Enprowess

SEPTEMBER 20, 2021

Like React, Vue features two-way binding, uses components and a virtual DOM. They use lazy loading to extend performance rates and reduce loading times and code refreshes via virtual DOMs. Its documentation has set a benchmark that beats anything from react camp. Depending on your requirements, Vue.js What is React?

Open Source 52

Open Source Mobile Google Scalability 52

SQL Server According to Bob

JANUARY 11, 2020

The BPool consumes the majority of the user mode address space leaving only a few 100 MB of the virtual address range free for thread stacks, DLLs, and other activities. SQLIOStress.exe The SQLIOStress test program (version 4.00.020 and later) contains special patterns to detect stale-read/lost-write problems quickly.

Servers 40

Servers Cache Media Hardware 40

Adrian Cockcroft

JUNE 21, 2022

Another big jump, but now it was my job to run benchmarks in the lab, and write white papers that explained the new products to the world, as they were launched. I was mostly coding in C, tuning FORTRAN, and when I needed to do a lot of data analysis of benchmark results used the S-PLUS statistics language, that is the predecessor to R.

Tuning 52

Tuning Benchmarking Engineering C++ 52

SQL Server According to Bob

JANUARY 11, 2020

​​ The following table outlines the virtual protection states. Page State Virtual Protection State Dirty Read Write ​​ during the modification. ​​ When the modification latch is acquired. ​​ Earlier versions of SQL Server require the trace flag as a startup parameter.

Servers 40

Servers Cache Database Media 40

The Netflix TechBlog

OCTOBER 14, 2024

To efficiently utilize our compute resources, Titus employs a CPU oversubscription feature , meaning the combined virtual CPUs allocated to containers exceed the number of available physical CPUs on a Titus agent. You will notice a do-while loop that is linear to the virtual memory area. Reads a 2GB file into memory. Repeats step 1.

Latency 214

Latency Virtualization Traffic Processing 214