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 They are: 1.

Performance 75

Performance Benchmarking Cache Tuning 75

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 They are: 1.

Performance 40

Performance Benchmarking Cache Tuning 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

Percona

AUGUST 30, 2018

Let’s examine the TPC-C Benchmark from this point of view, or more specifically its implementation in Sysbench. The illustrations below are taken from Percona Monitoring and Management (PMM) while running this benchmark. Analyzing read/write workload by counts.

Benchmarking 48

Benchmarking Database Operating System Architecture 48

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 107

Database Benchmarking Latency C++ 107

Scalegrid

JULY 13, 2020

In this article, we compare Oracle vs. PostgreSQL, outlining the differences in these SQL database costs, features, and ease of use for both developers and database administrators (DBA’s) alike. Compare ease of use across compatibility, extensions, tuning, operating systems, languages and support providers. At a glance – TLDR.

Open Source 244

Open Source Tuning C++ Database 244

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

url=/library/en-us/fileio/fs/sparse_files.asp ) ​​ on the ​​ Microsoft Developer Network ​​ (MSDN). Note: ​​ Pages that are nev er modified ( never​​ dirtied) remain in the clean state until they are dis c arded at which time the checksum is validated for the constant page.

Servers 40

Servers Cache Database Media 40

High Scalability

NOVEMBER 25, 2019

There are 200 Engineers(DevOps/OPS/QA/Developers/…), the rest are sales, marketing, support, product management, HR, etc. If you develop something then you own the lifecycle of that product, which means you would work with QA, DevOps to ensure it’s tested/deployed. What is your development environment? Google cloud.

Architecture 52

Architecture Cache Azure Storage 52