O'Reilly

FEBRUARY 18, 2020

Growth is still strong for such a large topic, but usage slowed in 2018 (+13%) and cooled significantly in 2019, growing by just 7%. But sustained interest in cloud migrations—usage was up almost 10% in 2019, on top of 30% in 2018—gets at another important emerging trend. ML + AI are up, but passions have cooled. Security is surging.

Software Architecture 145

Software Architecture DevOps Data Engineering Architecture 145

High Scalability

SEPTEMBER 21, 2018

” @mjpt777 : "Patterson indicated that rewriting Python into C gets you a 50 times speedup in performance". Too often, those who already hold power, those who are least able to recognize the flaws in our current systems, are the ones who decide our technological future. More quotes.

Internet 126

Internet Internet Scalability Traffic 126

O'Reilly

JANUARY 13, 2020

As we noted last year, the release of Java 11 in September 2018 brought a raft of new features, including many that give the release a significant, clear advantage for using containers. “Originally, we were hoping async/await syntax could be part of the 2018 edition of Rust, but it took longer to get things right.”

Programming 144

Programming Java Google C++ 144

Smashing Magazine

NOVEMBER 23, 2021

John C Barstow. On design systems, CSS/JS and UX. It follows best practices, tries to present a strong visual identity, has good contrast levels, and uses Overpass for headings and body, which provides a unified and legible sans serif family of typefaces: See the Pen [Dyslexia-unfriendly design]([link] by John C Barstow.

Website 140

Website C++ Best Practices Design 140

ACM Sigarch

MARCH 18, 2019

Computer systems, from the Internet-of-Things devices to datacenters, are complex and optimizing them can enhance capability and save money. Developing simulators, however, is time-consuming and requires a great deal of infrastructure development regarding a prospective system. Answered in Part 2.). Lazowska, et al.

Systems 61

Systems Latency Performance Analytics 61

Brendan Gregg

APRIL 30, 2018

USENIX’s LISA conference is the premier event for topics in production system engineering. The CFP for LISA18 is open now, and we’d love for you to submit talks and tutorials ideas by May 24th, 2018. We hope you'll consider submitting a talk or tutorial, and plan to attend LISA 2018. Join us for 3 days in Nashville at LISA'18.

DevOps 41

DevOps Network Best Practices Programming 41

Sutter's Mill

JANUARY 11, 2021

(Note that “no side effects on normal execution” is always automatically true for violation handlers even when an assertion system such as proposed in [4] allows arbitrary custom violation handlers to be installed, because those are executed only if we discover that we’re in a corrupted state and so are already outside of normal execution. [5]

C++ 81

C++ Programming Code Testing 81

Brendan Gregg

AUGUST 29, 2021

1072-aws (xxx) 12/18/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 5.03 avg-cpu: %user %nice %system %iowait %steal %idle 14.81 avg-cpu: %user %nice %system %iowait %steal %idle 14.86 avg-cpu: %user %nice %system %iowait %steal %idle 14.95 Hit Ctrl-C to end. ^C Hit Ctrl-C to end.

Cache 78

Cache C++ AWS Java 78

Brendan Gregg

APRIL 29, 2018

USENIX’s LISA conference is the premier event for topics in production system engineering. The CFP for LISA18 is open now, and we’d love for you to submit talks and tutorials ideas by May 24th, 2018. We hope you'll consider submitting a talk or tutorial, and plan to attend LISA 2018. Join us for 3 days in Nashville at LISA'18.

DevOps 40

DevOps Network Best Practices Programming 40

Smashing Magazine

DECEMBER 2, 2021

C# Advent Calendar. It’s time for the fifth annual C# advent calendar that will feature two pieces of content every day. Anyone can contribute by sharing their blog posts, videos, articles or podcast episodes dedicated to C# development. Christmas Experiments (2018). Stoyan Stefanov on Twitter. SysAdvent on Twitter.

Design 120

Design Development Programming Website 120

Percona

SEPTEMBER 13, 2018

2018-09-03.09 > mysql-slowquery.log.2018-09-03.09 2018-09-03.09 2018-09-03.09 system time, 43.80M rss, 141.48M vsz # Current date: Tue Sep 4 15:54:21 2018 # Hostname: aahmed-GL503VD # Files: mysql-slowquery.log.2018-09-03.09 2018-09-03.09 Run pt-query-digest on the log file. . $ user time, 2.5s

C++ 63

C++ AWS Open Source Testing 63

ACM Sigarch

MARCH 25, 2019

The M/M/1 queue will show us a required trade-off among (a) allowing unscheduled task arrivals, (b) minimizing latency, and (c) maximizing throughput. The M/M/1 queue also assumes that the arrival rate is not affected by the unbounded number of tasks in the queue (called an “open system”). Morgridge Professor and Gene M.

Systems 54

Systems Latency Performance C++ 54

Brendan Gregg

OCTOBER 7, 2018

Created by Alastair Robertson , bpftrace is an open source high-level tracing front-end that lets you analyze systems in custom ways. eBPF (extended Berkeley Packet Filter) is in the Linux kernel and is the new hotness in systems engineering. Here's key differences as of August 2018: Type DTrace bpftrace. Attaching 2 probes. ^C

C++ 40

C++ Virtualization Programming Latency 40

Scalegrid

AUGUST 15, 2019

Query Code for converting queries to five target language: Java, Python, C#, PHP, and JavaScript (Node.js). Community edition was released in early 2018, which lacks some features compared to paid versions, such as import/export, SSH connections, user management, support, etc. A Task Scheduler to automate repetitive MongoDB jobs.

Database 40

Database Servers Availability Monitoring 40

Nick Desaulniers

OCTOBER 24, 2018

qemu-system-x86_64. s -S & $ gdb vmlinux ( gdb ) target remote :1234 ( gdb ) hbreak start_kernel ( gdb ) c ( gdb ) lx-dmesg. qemu-system-x86_64 -kernel arch/x86_64/boot/bzImage. qemu-system-x86_64 -kernel arch/x86_64/boot/bzImage -nographic. It will seem that there’s no output, and QEMU isn’t responding to ctrl+c.

C++ 56

C++ Hardware Virtualization Systems 56

Sutter's Mill

FEBRUARY 25, 2021

Explain your answer using the following example, which uses a variation of a proposed post-C++20 syntax for preconditions. [1] Rewrite the example in Question 1 to show how to approximate the same effect using assertions in today’s C++. This has the big benefit that it works using today’s C++.

C++ 69

C++ Code Testing Systems 69

The Morning Paper

JUNE 20, 2019

In total, there were 112 such incidents over the period March – September 2018 (not all of them affecting external customers). Most Azure code is written in.Net managed languages such as C#, reducing memory leak bugs. I’d expect this class of bugs to also surface in microservices systems. Does that match your experience?

Cloud 81

Cloud Azure Cache C++ 81

The Netflix TechBlog

JULY 1, 2019

In a previous post , we described how our TV application consists of a C++ SDK installed natively on the device, an updatable JavaScript user interface (UI) layer, and a custom rendering layer known as Gibbon. when we rolled them out globally at the end of 2018. both the full and fallback experiences?—?when

Cache 167

Cache Design Testing Development 167

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 exactly the same with PostgreSQL for system choice a 2 socket system is optimal for MySQL OLTP performance. order by c. c_ytd_payment: 10.00

Best Practices 40

Best Practices Scalability Performance C++ 40

Brendan Gregg

AUGUST 18, 2019

C @ns: [256, 512) 10900 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [512, 1k) 18291 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [1k, 2k) 4998 |@@@@@@@@@@@@@@ | [2k, 4k) 57 | | [4k, 8k) 117 | | [8k, 16k) 48 | | [16k, 32k) 109 | | [32k, 64k) 3 | |. system(".") 6 * 7 * Copyright 2018 Netflix, Inc. Hit Ctrl-C to end. ^C

Latency 57

Latency C++ Cache Programming 57

Smashing Magazine

JUNE 30, 2021

iOS empowers developers to easily parallelize code using Grand Central Dispatch , Android does this via their new, unified task scheduler WorkManager and game engines like Unity have job systems. On design systems, CSS/JS and UX. Paul Lewis and I once explored actor-centric app architecture at Chrome Dev Summit 2018.

Games 145

Games Architecture Code C++ 145

Sutter's Mill

JANUARY 25, 2021

In the post-C++20 contracts proposal at [3], this is partly captured by the proposed basic levels of default , audit , and axiom , roughly intended to represent “cheap,” “expensive,” and “impossible” respectively. P0542: Support for contract based programming in C++” (WG21 paper, June 2018). Dos Reis, J. Meredith, N. Stroustrup.

C++ 63

C++ Programming Cache Testing 63

Sutter's Mill

MARCH 25, 2021

But if the sight of these function signatures has had you pulling your hair and shouting “use the type system, Luke!” c) just using post-C++20 contract preconditions (not yet valid C++, but something like the syntax in [2]) Preconditions test values, so they can let us eliminate the “wrong values” kinds of mistakes.

C++ 62

C++ Design Code Systems 62

Sutter's Mill

FEBRUARY 8, 2021

2] Explain your answer using the following example, which uses a variation of a proposed post-C++20 syntax for postconditions. [1] 2] Explain your answer using the following example, which uses a variation of a proposed post-C++20 syntax for postconditions. [1] How can we approximate those advantages?

C++ 63

C++ Lambda Code Efficiency 63

Randon ASCII

FEBRUARY 25, 2018

See the end of the post for an October 2018 bug fix update, or read the whole story: Flaky failures are the worst. The next step was a custom C++ program that opened the just-linked exe and called FlushFileBuffers on it. Update, October 2018. I also just heard that Windows 10 RS5 (1809, the fall 2018 update) has a fix.

Programming 79

Programming Hardware Cache Code 79

Nick Desaulniers

JUNE 2, 2018

ccache , the compiler cache, is a fantastic way to speed up build times for C and C++ code that I previously recommended. Sat Mar 17 03:04:59 UTC 2018. With ccache, we can check the cache hit/miss stats with -s , clear the cache with -C , and clear the stats with -z. make -j4 2008.93s user 231.69s system 346% cpu 10:47.07

Speed 46

Speed Cache C++ Systems 46

O'Reilly

MAY 19, 2020

Technical leads and architects (about 11%) are next, followed by software and systems architects (9+%). However, a notable minority—some 15%—occupy C-level or executive roles. In our analysis of user activity on the O’Reilly learning platform , we found that DevOps-related search and usage declined in both 2018 and 2019.

Cloud 144

Cloud Serverless AWS DevOps 144

HammerDB

OCTOBER 8, 2018

This post gives a HOWTO guide on system configuration for achieving top levels of performance with the HammerDB PostgreSQL TPC-C test. Firstly for system choice a 2 socket system is optimal for PostgreSQL OLTP performance at the time of writing. Many people use postgres. CPU Configuration. Although 9.6.5

Best Practices 40

Best Practices Scalability Performance Hardware 40

Brendan Gregg

AUGUST 29, 2021

1072-aws (xxx) 12/18/2018 _x86_64_ (16 CPU) avg-cpu: %user %nice %system %iowait %steal %idle 5.03 avg-cpu: %user %nice %system %iowait %steal %idle 14.81 avg-cpu: %user %nice %system %iowait %steal %idle 14.86 avg-cpu: %user %nice %system %iowait %steal %idle 14.95 Hit Ctrl-C to end. ^C Hit Ctrl-C to end.

Cache 40

Cache C++ AWS Systems 40

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. SQL> alter system flush buffer_cache; System altered.

Benchmarking 40

Benchmarking Database C++ Virtualization 40

HammerDB

MAY 5, 2019

Fortunately the HammerDB TPC-C/OLTP workload intentionally has a great deal of contention between threads and is therefore ideal for testing spin-locks. So to test I took a system with Skylake CPUs and all storage on a P4800X SSD. Copyright (C) 2003-2018 Steve Shaw. The OS was: Ubuntu 18.04.1 LTS (GNU/Linux 4.15.0-23-generic

Testing 49

Testing Tuning Storage Latency 49

HammerDB

NOVEMBER 30, 2018

It is of note that we have not discussed the operating system yet, that is because the source code and the code included with the pre-packaged versions is identical whether it is running on Linux or Windows on x86-64 architecture (or any other platform). These bin and lib directories are not included with the source code. HammerDB CLI v3.1

Architecture 40

Architecture Virtualization Open Source C++ 40

Percona

MAY 1, 2023

This blog was originally published in August 2018 and was updated in May 2023. It is primarily the responsibility of the database administrator or developer to tune PostgreSQL according to their system’s workload. Out of the box, the default PostgreSQL configuration is not tuned for any particular workload.

Tuning 52

Tuning Database Efficiency Performance 52

The Symphonia

DECEMBER 7, 2018

Serverless, and related announcements, at re:Invent 2018 The fountains at the Bellagio?—?still Ruby, C++, and Rust are now Lambda languages directly supported by AWS. artifacts that can be merged into your function’s file system before the function is executed. Closing out And that’s your re:Invent wrap-up for 2018.

Lambda 40

Lambda Serverless AWS Blockchain 40

Brendan Gregg

FEBRUARY 9, 2018

Also microbenchmarks, which often stress-test the system, will suffer the largest losses. This shows the system-wide syscall rate. I collected CPU profile as a [CPU flame graph] for both systems, but, for a change, they was boring: extra cycles were just in the syscall code, as one would expect reading the [KPTI changes].

Performance 72

Performance Benchmarking Cache Tuning 72

Smashing Magazine

SEPTEMBER 6, 2021

As discussed in part 2 , in HTTP/2, this multiplexing is steered using its prioritization system. As we also saw, however, this system was very complex , causing it to often be badly used and implemented in practice (see the image below). QUIPS , EPIQ 2018 , and EPIQ 2020. Implementation.

Network 120

Network Servers Cache Traffic 120

Smashing Magazine

FEBRUARY 8, 2022

So, in 2018, I wanted to revive Webpack Runtime Analyzer, using my newly accumulated experience. It might not be completely efficient if we use modules in raw form, as they are in the file system: there might be some doubles, some modules could be combined, and others are only partially used. Then, Webpack optimizes this graph.

Storage 89

Storage Code Metrics C++ 89