The Netflix TechBlog

JUNE 20, 2023

In the second approach, we show that a relatively simple, supervised sequential model (bidirectional LSTM or GRU) that uses rich, pretrained shot-level embeddings can outperform the current state-of-the-art baselines on our internal benchmarks. Figure 1: a scene consists of a sequence of shots.

Benchmarking 259

Benchmarking C++ Availability Programming 259

Daniel Lemire

FEBRUARY 8, 2019

I believe that all optimizing C/C++ compilers know how to pull this trick and it is generally beneficial irrespective of the processor’s architecture. In concrete terms, here is the C code to compute the remainder of the division by some fixed divisor d : uint32_t d =. ; // your divisor > 0. if ( ( i % 3 ) = = 0 ).

C++ 279

C++ Benchmarking Hardware Testing 279

Percona

NOVEMBER 3, 2023

Leveraging pgbench , which is a benchmarking utility that comes bundled with PostgreSQL, I will put the cluster through its paces by executing a series of DML operations. And now, execute the benchmark: -- execute the following on the coordinator node pgbench -c 20 -j 3 -T 60 -P 3 pgbench The results are not pretty.

Database 110

Database Benchmarking Latency C++ 110

HammerDB

OCTOBER 18, 2019

HammerDB doesn’t publish competitive database benchmarks, instead we always encourage people to be better informed by running their own. So over at Phoronix some database benchmarks were published showing PostgreSQL 12 Performance With AMD EPYC 7742 vs. Intel Xeon Platinum 8280 Benchmarks . bin/createdb pgbench./bin/pgbench

Benchmarking 63

Benchmarking Performance Hardware C++ 63

Percona

DECEMBER 26, 2023

Querying the data While it is reasonable to create panels showing real-time load in order to explore better the types of queries that can be run against pg_stat_monitor, it is more practical to copy and query the data into tables after the benchmarking has completed its run. A script executing a benchmarking run: #!/bin/bash

Benchmarking 126

Benchmarking Metrics C++ Database 126

DZone

APRIL 26, 2022

pomriq MRI reconstruction benchmark is written in C and parallelized using OpenMP. In OpenMP® programs that take advantage of heterogenous parallelism, the master clause can be used to exploit simultaneous CPU and GPU execution. In this article, we will show you how to do CPU+GPU asynchronous calculation using OpenMP.

Programming 130

Programming Efficiency Benchmarking C++ 130

HammerDB

DECEMBER 5, 2020

compared to previous releases is that the workload names have changed from TPC-C and TPC-H to TPROC-C and TPROC-H respectively and therefore a key question is how are the v4.0 The simple answer is nothing, the workloads are exactly the same workloads derived from the TPC-C and TPC-H specifications and HammerDB v4.0

C++ 40

C++ Benchmarking Virtualization Open Source 40

HammerDB

JUNE 22, 2023

Copyright (C) 2003-2023 Steve Shaw Type "help" for a list of commands Initialized new Jobs on-disk database /opt/HammerDB-4.8/DATA/hammer.db On Windows it will look for TEMP, TMP, TMPDIR or finally C: for example, on Linux. In this example, we will run a PostgreSQL TPROC-C autopilot workload to generate some jobs to analyse.

Benchmarking 57

Benchmarking C++ Virtualization Database 57

Percona

DECEMBER 20, 2023

Unfortunately, the performance in benchmarks is almost the same as for 4KB pages. Please check out the Why Linux HugePages are Super Important for Database Servers: A Case with PostgreSQL blog post for more information. Setup I recommend starting with 2MB huge pages because it’s trivial to set up.

C++ 105

C++ Virtualization Benchmarking Database 105

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 62

Benchmarking Open Source C++ Cache 62

n0derunner

NOVEMBER 17, 2022

Taken from SQLserver properties immediately after creating the TPC-C like schema in HammerDB and then using server and then using Tasks->Shrink->Database. The post Database sizes for HammerDB TPC-C/ SQLserver appeared first on n0derunner. The on disk size for small DB sizes. Warehouse Count Database size 10 826 MB 100 8,057 MB.

C++ 40

C++ Database Servers Benchmarking 40

HammerDB

JANUARY 5, 2019

Some opinions claim that “Benchmarks are meaningless”, “benchmarks are irrelevant” or “benchmarks are nothing like your real applications” However for others “Benchmarks matter,” as they “account for the processing architecture and speed, memory, storage subsystems and the database engine.”

Benchmarking 40

Benchmarking Database Social Media Scalability 40

ACM Sigarch

OCTOBER 12, 2020

These, let’s call them metal languages , include FORTRAN (introduced in 1957), C (1972), and C++ (1985). Programmers continue to write applications in them, and they continue to evolve: the just approved C++20 standard is the latest example. Despite their age, these languages are far from dead! As Leiserson et al.

C++ 108

C++ Benchmarking Hardware Architecture 108

The Morning Paper

MAY 27, 2019

CheriABI: enforcing valid pointer provenance and minimizing pointer privilege in the POSIX C run-time environment Davis et al., And this all has to work for whole-system executions, not just the C-language portion of user processes. Most programs (almost 800 C programs in the FreeBSD source tree) require no modifications.

C++ 61

C++ Hardware Virtualization Benchmarking 61

HammerDB

JULY 8, 2024

A frequently asked question with HammerDB is when a user is using the TPROC-C workload to test database failure and failover scenarios, by deliberately killing connections or shutting down the database during a workload and then restarting it. Is a TPROC-C workload valid if you have restarted the database?

Database 52

Database Benchmarking Virtualization C++ 52

HammerDB

OCTOBER 18, 2018

An essential part of database performance testing is viewing the statistics generated by the database during the test and in 2009 HammerDB introduced automatic AWR snapshot generation for Oracle for the TPC-C test. With this feature Oracle generates a wealth of performance data that can be reviewed once the test is complete.

Benchmarking 40

Benchmarking Monitoring Performance C++ 40

HammerDB

OCTOBER 24, 2023

by @krithikasatish and @JoshInnis to provide accelerated load performance for both SQL Server TPROC-C and TPROC-H schemas. Using BCP our TPROC-C build now completed almost 3X faster and tests on TPROC-H showed similar results. This post provides an introduction to the new feature added to HammerDB v4.9 With the default for v4.9

Servers 62

Servers C++ Benchmarking Virtualization 62

HammerDB

FEBRUARY 25, 2021

HammerDB is a load testing and benchmarking application for relational databases. However, it is crucial that the benchmarking application does not have inherent bottlenecks that artificially limits the scalability of the database. Basic Benchmarking Concepts. To benchmark a database we introduce the concept of a Virtual User.

Programming 67

Programming Benchmarking Virtualization C++ 67

The Morning Paper

MAY 12, 2019

An open-source benchmark suite for microservices and their hardware-software implications for cloud & edge systems Gan et al., A typical architecture diagram for one of these services looks like this: Suitably armed with a set of benchmark microservices applications, the investigation can begin! ASPLOS’19.

Open Source 61

Open Source Hardware Benchmarking Systems 61

HammerDB

NOVEMBER 22, 2021

This enables the user to compare and contrast performance across different benchmark scenarios. usr/bin/install -c -m 644./pg_stat_statements--1.4.sql./pg_stat_statements--1.8--1.9.sql./pg_stat_statements--1.7--1.8.sql./pg_stat_statements--1.6--1.7.sql./pg_stat_statements--1.5--1.6.sql./pg_stat_statements--1.4--1.5.sql. src/port -L././src/common

Metrics 62

Metrics Benchmarking C++ Database 62

Percona

JULY 19, 2023

Well, “easy” if you know just a tiny bit of C++. Our function will implement a ULID generator using a C++ library from ChrisBove/ulid. 132:39: warning: unused parameter ‘initid’ [-Wunused-parameter] extern "C" void ulid_deinit(UDF_INIT *initid) {} ~~~~~~~~~~^~~~~~ [100%] Linking CXX shared module././plugin_output_directory/ulid.so

C++ 85

C++ Servers Benchmarking Best Practices 85

Percona

JANUARY 2, 2024

We decided to run a few benchmarks to understand how the thread pool affects long-running transactions. When analyzing the workload, I found that the performance drop was caused by applications executing some very long queries like UPDATE affecting many rows, INSERT… SELECT without limit clause and other similar DMLs.

Benchmarking 90

Benchmarking Servers Tuning C++ 90

HammerDB

MARCH 25, 2023

Docker build, example CLI scripts were added to build and run the TPROC-C workload in the Tcl language. these were enhanced to also add Python based scripts, and to include scripts for both TPROC-C and TPROC-H and a driver script for Linux environments. With the HammerDB v4.5 In HammerDB v4.6 With HammerDB v4.7

C++ 83

C++ Virtualization Benchmarking Database 83

HammerDB

APRIL 19, 2023

GHz 4th Generation Intel Xeon Scalable processors (code-named Sapphire Rapids) Up to 20% higher compute performance than z1d instances Up to 50 Gbps of networking speed Up to 40 Gbps of bandwidth to the Amazon Elastic Block Store (EBS) We can also verify these capabilities by running some simple benchmarks on the different subsystems.

Performance 54

Performance Benchmarking Cache Storage 54

Daniel Lemire

FEBRUARY 19, 2019

As a benchmark, I am going to compute a linear congruential generator (basically a recursive linear function with a remainder thrown in), using these three approaches, plus the naive one. There is no silver bullet but a simple C function can beat a state-of-the-art optimizing compiler. uint32_t indirectmod64 ( uint32_t a ) {.

Benchmarking 138

Benchmarking C++ Games Code 138

n0derunner

APRIL 20, 2021

DISTRICT] DROP … The post How to drop tables for HammerDB TPC-C on SQL Server appeared first on n0derunner. This will allow you (for instance) to re-create the database, or create a new database with more warehouses (larger size) while retaining the same name/DB layout. USE [TPCC] DROP TABLE [dbo]. CUSTOMER] DROP TABLE [dbo].

C++ 40

C++ Servers Database Benchmarking 40

n0derunner

APRIL 20, 2021

DISTRICT] DROP … The post How to drop tables for HammerDB TPC-C on SQL Server appeared first on n0derunner. This will allow you (for instance) to re-create the database, or create a new database with more warehouses (larger size) while retaining the same name/DB layout. USE [TPCC] DROP TABLE [dbo]. CUSTOMER] DROP TABLE [dbo].

C++ 40

C++ Servers Database Benchmarking 40

Particular Software

SEPTEMBER 27, 2022

Starting with.NET 5, we can mark the lambda as static with C# 9. const int myNumber = 42;MyFunction(static () => Console.WriteLine(myNumber));<Main>g__MyFunction|0_0(<>c.<>9__0_1 <>9__0_1 ?? (<>c.<>9__0_1 <>9__0_1 = new Action(<>c.<>9.<Main>b__0_1)));

Lambda 98

Lambda C++ Benchmarking Code 98

Speed Curve

MARCH 5, 2023

Site A Site B Site C Site D Observations 1. The poverty line emerges surprisingly quickly in some cases For example, Site C's performance poverty line starts at 400 milliseconds. For some sites (such as Site C), the difference was as little as 300 milliseconds. That's early! seconds to work toward.

Performance 118

Performance C++ Metrics Ecommerce 118

n0derunner

JANUARY 12, 2021

pgbench paramaters for concurrency control pgbench offers two parameters for controlling the concurrency in the benchmark. j, --jobs=NUM number of threads (default: 1) -c for ‘clients’ The number of “postgres” processes to run. -c, c, --client=NUM number of concurrent database clients (default: 1) Here are.

Benchmarking 52

Benchmarking C++ Database Processing 52

Scalegrid

JULY 13, 2020

Objective C. SolarisUnix. Supported Languages. JavaScript. Visual Basic.Net. JavaScript (Node.js). PostgreSQL support is available free from the community, and there are also many support providers available for advanced assistance.

Open Source 244

Open Source Tuning C++ Database 244

HammerDB

MAY 26, 2022

If you are not already familiar with the programming languages that HammerDB uses, then this earlier post serves as an ideal introduction to what makes up the highest performing GIL free database benchmarking application. set MARIADB_CONFIG=C:Program FilesMariaDBMariaDB Connector C 64-bit set MYSQL_CONFIG=C:Program FilesMySQLMySQL Server 8.0

C++ 113

C++ Database Servers Open Source 113

Percona

DECEMBER 23, 2022

The use case is the TPC-C benchmark but executed not on a high-end server but on a lower-spec virtual machine that is I/O limited like for example, with AWS EBS volumes. The TPC-C dataset I used was with a scale of 200. TPC-C on MyRocks. MyRocks handles indexes in a similar fashion.

Storage 56

Storage Cache C++ Virtualization 56

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. synchronous_commit = off # synchronization.

Benchmarking 40

Benchmarking Database C++ Virtualization 40

HammerDB

MARCH 27, 2023

introduces more lightweight database specific Docker Images, so if you only want to run benchmarks against a specific database you can go from having no benchmarking environment to reviewing your results in as little as 3 commands. How to deploy HammerDB CLI fast with Docker HammerDB v4.7 Copy Code Copied Use a different Browser.

Benchmarking 51

Benchmarking Testing Database C++ 51

HammerDB

DECEMBER 14, 2022

Copyright (C) 2003-2022 Steve Shaw Type "help" for a list of commands Initialized new SQLite on-disk database /tmp/hammer.DB Under the HammerDB home directory is a scripts directory containing example scripts to test all supported databases except for Db2 in both tcl and python format for both TPROC-C and TPROC-H workloads. TMP/hammer.DB

C++ 62

C++ Virtualization Database Benchmarking 62

The Morning Paper

MAY 23, 2019

Looking across a set of eight Java benchmarks, we find that only two of them are array dominated, the rest having between 40% to 75% of the heap footprint allocated to objects, the vast majority of which are small. Consider a B-Tree node from the B-tree Java benchmark: Uncompressed, it’s memory layout looks like (a) below. Evaluation.

Cache 61

Cache Benchmarking Hardware Java 61