Brendan Gregg

OCTOBER 8, 2018

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 | |. ply is also C, whereas bpftrace is C++. # Attaching 2 probes. ^C

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C++ Virtualization Programming Latency 110

Brendan Gregg

DECEMBER 21, 2019

In the video I explained how I arrived at tracing __iwl_dbg() in this way, and how you can follow a similar approach for tracing unfamiliar code. This is not my best code, since I hacked it in a hurry, but here it is: #!/usr/bin/python Embedded C. # # Tone generation from: [link] # # 29-Apr-2019 Brendan Gregg Created this.

C++ 52

C++ Education Java AWS 52

Brendan Gregg

DECEMBER 21, 2019

In the video I explained how I arrived at tracing __iwl_dbg() in this way, and how you can follow a similar approach for tracing unfamiliar code. This is not my best code, since I hacked it in a hurry, but here it is: #!/usr/bin/python Embedded C. # # Tone generation from: [link] # # 29-Apr-2019 Brendan Gregg Created this.

C++ 52

C++ Education Java AWS 52

SQL Performance

MAY 1, 2020

In a recent tip , I described a scenario where a SQL Server 2016 instance seemed to be struggling with checkpoint times. Kendra Little – Target Recovery Interval and Indirect Checkpoint – New Default of 60 Seconds in SQL Server 2016. SQL 2016 – It Just Runs Faster: Indirect Checkpoint Default. group_id = c.

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C++ Database Servers Storage 58

Tech News Gather

NOVEMBER 22, 2022

Programmers are shifting to the more result-oriented and user-friendly Kotlin programming language due to its high compatibility with Java and Objective C and its excellent tooling support. It has the tremendous advantage of reusable code, which saves time and effort. When developers write Java code, they are bound to make mistakes.

Development 52

Development Java Programming Google 52

SQL Performance

DECEMBER 9, 2020

Use the following code to run a test with base CTE cardinality of 2 (requires 5 additional levels of CTEs): DECLARE @low AS BIGINT = 1 , @high AS BIGINT = 100000000 ; WITH. Make sure that you enable Discard results after execution in your SSMS Query Options dialog under Grid, Results.

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C++ Servers Testing Processing 61

SQL Performance

APRIL 20, 2021

A reminder of the plan ( click to enlarge ): This is the first point in the process so far that an in-flight execution plan is available (SQL Server 2016 SP1 onward) in sys.dm_exec_query_statistics_xml. Additional parallel workers will be started to run the additional parallel tasks contained in branches B, C, and D. Starting Sequence.

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C++ Processing Servers Cache 98

Adrian Cockcroft

JANUARY 29, 2023

I presented this analysis of response time distributions talk in 2016 — at Microxchg in Berlin ( video ). The code is written using the R statistics language and I downloaded a free copy of RStudio to run the examples below. > > system.time(wait1 <- normalmixEM(waiting, mu=c(50,80), lambda=.5,

Lambda 98

Lambda Latency Cache C++ 98

SQL Performance

MARCH 20, 2020

In SQL Server 2016, STRING_SPLIT solved a long-missing gap in a language that, admittedly, was not intended for complicated string processing. For years before SQL Server 2016 (and for years since), we've written our own versions, improved them over time, and even argued about whose was fastest.

Database 109

Database Servers C++ AWS 109

SQL Performance

APRIL 10, 2019

The ISO/IEC 9075:2016 standard, or SQL:2016 in short, introduces support for a profound concept called Row Pattern Recognition (RPR) in SQL. The SQL:2016 standard provides two main RPR-related features: Feature R010, “Row pattern recognition: FROM clause”. . ( price ) AS bottomprice , LAST ( C. LAST ( C.

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C++ Virtualization Servers Code 73

Randon ASCII

JANUARY 22, 2017

The savings this time are less important as they are mostly in the.BSS segment, but there are also some modest code-size savings, and some interesting lessons. In August of 2016 Chrome switched meta-build systems, from gyp to gn. In this episode I’ll show how deleting an inline function definition can lead to similar savings.

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C++ Code Systems Processing 56

Alex Podelko

OCTOBER 28, 2016

I am looking forward to share my thoughts on ‘Reinventing Performance Testing’ at the imPACt performance and capacity conference by CMG held on November 7-10, 2016 in La Jolla, CA. To do this, the tool should have the ability to add code to (or invoke code from) your script. Tools, using standard languages such as C (e.g.

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Performance Testing Technology Technology Testing 100

Brendan Gregg

OCTOBER 7, 2018

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 | |. ply is also C, whereas bpftrace is C++. # Attaching 2 probes. ^C

C++ 40

C++ Virtualization Programming Latency 40

SQL Performance

OCTOBER 29, 2019

Borrowing and adapting code from a previous post, Examining the Performance Impact of an Adhoc Workload , we will first create two stored procedures. CustomerID , c. Customers c JOIN Sales. CustomerTransactions ct ON c. GROUP BY c. CustomerID , c. Example Scenario. AccountOpenedDate , COUNT ( ct.

C++ 74

C++ Database Servers Tuning 74

SQL Performance

SEPTEMBER 2, 2021

SQL Server 2016 brought us STRING_SPLIT , a native function that eliminates the need for many of the custom solutions we’ve needed before. STRING_SPLIT() in SQL Server 2016 : Follow-Up #1. STRING_SPLIT() in SQL Server 2016 : Follow-Up #2. SQL Server Split String Replacement Code with STRING_SPLIT. WHERE Item = c.

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C++ Servers Testing Database 59

Percona

JUNE 4, 2023

The worklogs are where the design for future releases happens, and these are opened up when their features are fully developed and source-code-pushed. From a source code standpoint, MySQL makes pushes to Github when a release is made, whereas open source development happens for Percona Server for MySQL and MariaDB Server on Github.

Open Source 52

Open Source Servers Storage Scalability 52

Smashing Magazine

FEBRUARY 8, 2022

In 2016, I released the first version of the tool, then called not Statoscope, but Webpack Runtime Analyzer. We don’t need the second export, so we can painlessly remove it without harming the bundled code. With detailed code walkthroughs , hands-on examples and common gotchas — all broken down into short, manageable lessons.

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Storage Code Metrics C++ 79

Rigor

JANUARY 13, 2020

These are the bestsellers in the web performance field, including the good old Speed Up Your Site (2003) by Andy King; Steve Souders’ Even Faster Web Sites (2009) ; Ilya Grigorik’s High Performance Browser Networking (2013) ; Tammy Everts’ Time is Money (2016) ; and a handful of more recent publications.

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Performance Social Media Website Website Performance 75

Testsigma

MAY 21, 2021

The biggest challenge that is aimed to solve was the inclusion of automatic waits, such that tests would work without the need of adding waits in the code to make the tests wait for a particular element. Because of its increasing popularity and usage, Google rewrote and rereleased it in 2016. Who can use it? Automation of web browsers?

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Open Source Mobile Google Infrastructure 52

Brendan Gregg

SEPTEMBER 5, 2017

LTS (April 2016). It uses a Solaris Porting Layer (SPL) to provide a Solaris-kernel interface on Linux, so that unmodified ZFS code can execute. There's also a ZFS send/recv code path that should try to use the TASK_INTERRUPTIBLE flag (as suggested by a coworker), to avoid a kernel hang (can't kill -9 the process).

Virtualization 76

Virtualization AWS Engineering Hardware 76

SQL Performance

SEPTEMBER 5, 2019

You will need SQL Server 2016 (or later) and Developer Edition (or equivalent) to reproduce the results shown here. CREATE CLUSTERED COLUMNSTORE INDEX c ON #T WITH ( MAXDOP = 1 ) ; Run the following test queries against the new columnstore table: SELECT. c1 = @Start + N. FROM #Numbers AS N ; GO. m = MAX ( T.

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Performance C++ Storage Servers 81

John McCalpin

NOVEMBER 5, 2016

In the latest (October 2016) revision of Intel’s Instruction Extensions Programming Reference , Intel has disclosed a fairly dramatic departure from these “traditional” approaches. Notes on notation: C[i][j] is invariant in the innermost loop, so I refer to the values in the accumulator as elements of the C array.

Cache 40

Cache C++ Latency Hardware 40

Nick Desaulniers

NOVEMBER 20, 2016

Let’s say we wanted to reuse some of the code from our previous project in our next one. clang -c x.c While static libraries allowed us to reuse source code, static linkage does not allow us to reuse memory for executable code between different processes. This is the second post in a series on memory segmentation.

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C++ Programming Code Virtualization 48

SQL Server According to Bob

JANUARY 5, 2017

By March of 2016 Slava had convinced me to join the team. int c = a + b; 0134167C 8B 45 F8 mov eax,dword ptr [a]. 01341682 89 45 E0 mov dword ptr [c],eax. If you look at the difference in the binary images the differences are operating system specific (headers) but the actual code of execution is the same between the images.

Servers 40

Servers Operating System C++ Software Engineering 40

Randon ASCII

FEBRUARY 25, 2018

In September of 2016 we started noticing random failures when building Chrome – 3 out of 200 builds of Chrome failed when protoc.exe, one of the executables that is part of the build, crashed with an access violation. Now we have a problem statement that we can reason about: why are large chunks of our code segment filled with zeroes?

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Programming Hardware Cache Code 79

J. Paul Reed

JANUARY 24, 2017

In the vein of my 2016 prediction that DevOps will continue dis-integrating , I believe that we’ll see a process of “ othering ” with definitions of DevOps that are not highly aligned with the The Handbook’s definition, along with pressure to rename those ideas to soemthing other than “DevOps.” And we now have that.

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DevOps Engineering IoT C++ 40

SQL Performance

SEPTEMBER 25, 2019

This value is hard-coded into SQL Server and has not been changed following the increase to 1700 bytes for nonclustered index keys from SQL Server 2016 onward. c1 UNION SELECT NULL ) AS U ) AS CA ( c ) ; Notice the Stream Aggregate below the Lazy Index Spool. Optimizer Rules. FROM #T1 AS T1 CROSS APPLY. (

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Performance Cache Servers Education 104

SQL Server According to Bob

AUGUST 23, 2016

Create Access DLL Code. The creation of the XTP, common access DLL requires SQL Server to generate C code, invoke the C compiler and save the DLL into the XTP directory. The creation of the XTP, common access DLL requires SQL Server to generate C code, invoke the C compiler and save the DLL into the XTP directory.

C++ 40

C++ Software Engineering Servers Code 40

Particular Software

OCTOBER 3, 2017

This article was originally published on the NDC 2016 Blog. Code that had duplication all over the place? Chances are you were dealing with legacy code that was written years ago. In my 15+ years of coding, every single time I've dealt with legacy code, fear, anger, hate, and suffering were pretty common.

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Architecture Database Code Systems 49

Scalegrid

AUGUST 15, 2019

In 2014, we discussed 4 of the top MongoDB GUIs: MongoVue, MongoHub, RockMongo, and Robo 3T (formerly Robomongo), and again in 2016: MongoDB Compass, Robo 3T, Studio 3T, and MongoBooster. It’s further enhanced by an in-place code editor which is also available in all three views. We left those at the end of this post for your review.

Database 40

Database Servers Monitoring Availability 40

Alex Russell

MAY 9, 2022

Who owns this code? This blindspot usually extends up to the C-suite. Teams in this space can make trades intelligently, moving around code and time within a system they have mastered to ensure the best possible outcomes in essential flows. miAi3020A9G #perfmatters 1 10:04 AM · Jul 7, 2016. Why is it there?

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Performance Latency Metrics Engineering 86

Smashing Magazine

OCTOBER 26, 2018

When it comes down to how WordPress is programmed, one thing is certain: it doesn’t follow the M odel- V iew- C ontroller (MVC) design pattern that many developers are familiar with. Before we delve deeper in the code, a couple more things about WordPress REST API. on December 6th, 2016. Working With WordPress REST API.

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Cache Website Speed Database 78

SQL Server According to Bob

FEBRUARY 10, 2019

– -c the control file. We then found a few code paths in find login that did not switch to preemptive before making a call to SSSD or LDAP for Linux, AD activities. The bug is in the find login code not going preemptive before querying the domain controller, leading to delays and login timeouts. – -o output location.

Servers 40

Servers Network Database Systems 40

SQL Server According to Bob

JANUARY 28, 2018

SQL Server also supports XA based transactions but has no code in the SQL Server engine to engage in XA transactions. MSDTC can also be used as the XA TM if so desired (see example code at end of this post.). extern “C” { extern struct xa_switch_t msqlsrvxa1; }. MSDTC can engage in MSDTC, XA, LU and TIP transactions.

Servers 40

Servers Azure Engineering Java 40

Smashing Magazine

JANUARY 21, 2019

A component is simply a set of pieces of HTML, JavaScript and CSS code put all together to create an autonomous entity. I will demonstrate this by re-imagining how this example coded for React would fare in a component-based API. Recommended reading : A GraphQL Primer: Why We Need A New Kind Of API. Building A Site Through Components.

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Social Media Database Media Website 64

SQL Server According to Bob

DECEMBER 18, 2018

Before all was said and done, all of these people and more helped with various activities: · Eugene, Mike, Slava, Scott, Peter, Steve and others doing code reviews on my SQL Server and Host Extension changes. · Red Hat, SUSE, HPE, Intel helping and confirming Linux behaviors and making file system code changes. When SQL Server 7.0

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Servers Media Cache Storage 90

Smashing Magazine

JULY 6, 2021

With Luminary’s 21 years of experience in the digital space, my experience of 17 years in the CMS space as well as our focus on Headless since 2016, here are my two cents on what you should look out for. All functionality and integrations would also have a tight dependency which in turn results in a large, cumbersome monolithic code base.

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Cache Website Mobile Google 143