CheriABI: enforcing valid pointer provenance and minimizing pointer privilege in the POSIX C run-time environment

The Morning Paper

abstract capabilities are constructed only through legitimate provenance chains of operations, successively reducing permissions from initial maximally permissive capabilities provided at machine reset. The MIPS rows show the test suite results on a standard mips64 system.

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Tuning PostgreSQL Database Parameters to Optimize Performance


It has default settings for all of the database parameters. It is primarily the responsibility of the database administrator or developer to tune PostgreSQL according to their system’s workload. In this blog, we will establish basic guidelines for setting PostgreSQL database parameters to improve database performance according to workload. It is important to pay attention to performance when writing database queries.

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Which Is the Best PostgreSQL GUI? 2019 Comparison


PostgreSQL graphical user interface (GUI) tools help these open source database users to manage, manipulate, and visualize their data. PostgreSQL is the fourth most popular database management system in the world, and heavily used in all sizes of applications from small to large.

The top 5 reasons to run your own database benchmarks


This post addresses some of the opinions around database benchmarking and gives the top 5 reasons why industry standard benchmarking is important and should be an essential foundation of your database engineering strategy. So are standard database benchmarks meaningless?

AWS Elastic Beanstalk: A Quick and Simple Way into the Cloud - All.

All Things Distributed

Werner Vogels weblog on building scalable and robust distributed systems. Flexibility is one of the key principles of Amazon Web Services - developers can select any programming language and software package, any operating system, any middleware and any database to build systems and applications that meet their requirements. a Fast and Scalable NoSQL Database Service Designed for Internet Scale Applications. All Things Distributed.

Is It a Read Intensive or a Write Intensive Workload?


One of the common ways to classify database workloads is whether it is “read intensive” or “write intensive”. You can also choose to look at event counts or at the time it takes to do operations. At the highest level, you can think about queries that are sent to the database.

Tune Linux Kernel Parameters For PostgreSQL Optimization


For optimum performance, a PostgreSQL database depends on the operating system parameters being defined correctly. Poorly configured OS kernel parameters can cause degradation in database server performance. PostgreSQL uses System V (SysV) that requires SHMMAX setting.

What is APM?


The variables that can impact the performance of an application vary; from coding errors or ‘bugs’ in the software, database slowdowns, hosting and network performance, to operating system and device type support. Dynatrace news.

Taskbar Latency and Kernel Calls

Randon ASCII

I work quickly on my computer and I get frustrated when I am forced to wait on an operation that should be fast. Remember that these are calls to the operating system – kernel calls. I get cranky when databases do 4-KiB reads but this is amazing.

Average Page Load Times for 2020 – Are you faster?


It is typically reduced via server-side optimizations, such as enabling caching and database indexes. With another year winding down, it’s time for us to take stock of how our site performance compares to the average page load times for 2020.

HammerDB Concepts and Architecture


However if you have downloaded the source code and are looking to add features or make modifications such as adding new databases you may be wondering once you have the source code where to start. loaded library Oratcl for Oracle Checking database library for MSSQLServer Success.

Azure Virtual Machines for SQL Server Usage

SQL Performance

You will still have to maintain your operating system, SQL Server and databases just like you would in an on-premises scenario. According to Microsoft, "Memory optimized VM sizes offer a high memory-to-CPU ratio that are great for relational database servers."

PREVIEW : SentryOne Plan Explorer Extension for Azure Data Studio

SQL Performance

Connecting to SQL Server 2012 or better, or Azure SQL Database. And recommended system configuration: Two or more cores 8GB or more of memory Operating Systems: Windows (8.1 / Server 2012 R2 or better) macOS (10.13

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Azure SQL Managed Instance Performance Considerations

SQL Performance

Azure SQL Database Managed Instance became generally available in late 2018. For some it has been a showstopper, and for others, they have been able to optimize and modify their system to decrease the load.

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Common SQL Server Mishaps

SQL Performance

This article will expand on my previous article and point out how these apply to SQL Server , Azure SQL Database , and Azure SQL Managed Instance. I always check backups first when looking at a new system. Azure SQL Database and Azure Managed Instance have managed backups.

A Decade of Dynamo: Powering the next wave of high-performance, internet-scale applications

All Things Distributed

We had an advanced team of database administrators and access to top experts within Oracle. We were pushing the limits of what was a leading commercial database at the time and were unable to sustain the availability, scalability and performance needs that our growing Amazon business demanded.

SQL Server on Linux: Scatter/Gather == Vectored I/O

SQL Server According to Bob

The buffers must be the operating system page size (4K.) There are a few locations (zero file, column store, …) in SQL Server which attempt to read or write more then 1024 database pages in a single request.

Testing MySQL 8.0.16 on Skylake with innodb_spin_wait_pause_multiplier


Note that the main developer of HammerDB is Intel employee (#IAMINTEL) however HammerDB is a personal open source project and HammerDB has no optimization whatsoever for a database running on any particular architecture. Vuser 1:TEST RESULT : System achieved 2159378 MySQL TPM at 713488 NOPM.

Open Source at AWS re:Invent

Adrian Cockcroft

AWS Developer Relations on how the shift from Robot Operating System (ROS) 1 to ROS 2 will change the landscape for all robot lovers. OPN220 Build robotic cloud simulations with ROS and AWS RoboMaker Join Camilo Buscaron, AWS Principal Open Source Technologist, and Katherine Scott, Developer Advocate, Open Robotics in this workshop to use Gazebo, a 3D simulator, and Robot Operating System (ROS) on AWS RoboMaker and learn how to spin up robotic simulations.

SQL Server I/O Basics Chapter #2

SQL Server According to Bob

​​ Without limiting the rights under copyright, no part of this document may be reproduced, stored in or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of Microsoft Corporation. ​​ SQL Server ​​ copy-on-write actions are used to maintain snapshot databases in SQL Server 2005.

5 tips for architecting fast data applications

O'Reilly Software

Google was among the pioneers that created “web scale” architectures to analyze the massive data sets that resulted from “crawling” the web that gave birth to Apache Hadoop, MapReduce, and NoSQL databases. We usually relate SQL to querying tables in relational databases.

The Different Software Testing Types Explained


Examples of Dynamic Testing- Unit testing, System testing, Integration testing, Performance testing, Security testing. Test cases are created, then run on the system and the actual results are validated against the expected results. How efficiently a user is able to use the system?



A wide range of users with different operating systems, browsers, hardware configurations and other variables provides a wide sample size that helps developers discover as many issues as possible.

Regression Testing vs Retesting-Differences and Examples


The testing phase starts with unit testing followed by integration testing, system testing, system integration testing, acceptance testing, and regression testing. System testing- checks end to end flows works as expected.

SQL Server on IoT Edge and Developer Machines – Smaller Footprint

SQL Server According to Bob

SQL Server will ship Azure SQL Database Edge: [link]. For example, Azure SQL Database Edge can already use TSQL Predict Machine Learning (ML) and Column Storage. Partitioning allows SQL Server to scale to the largest systems with record-setting performance. When promoted to a super-latch on a 64 CPU system the memory requirement becomes 32 + (32 *64) = 2080 bytes. However, on smaller systems and VMs the partitioning may not be required to maintain performance.

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SQL Server I/O Basics Chapter #1

SQL Server According to Bob

Microsoft SQL Server I/O Basics Author: ​​ Bob Dorr, Microsoft SQL Server Escalation Published: ​​ December, 2004 SUMMARY: ​​ Learn the I/O requirements for Microsoft SQL Server database file operations. This will help you increase system performance and avoid I/O environment errors. Both Microsoft Knowledge Base and Microsoft SQL Server Books Online (BOL) contain many details related to SQL Server I/O operations.

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PREVIEW : SentryOne Plan Explorer Extension for Azure Data Studio

SQL Performance

Connecting to SQL Server 2012 or better, or Azure SQL Database. And recommended system configuration: Two or more cores 8GB or more of memory Operating Systems: Windows (8.1 / Server 2012 R2 or better) macOS (10.13 Updated August 15th, 2019 for 0.9.6.

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Back-to-Basics Weekend Reading - U-Net: A User-Level Network Interface

All Things Distributed

In what seems almost a previous life by now Thorsten was one of the top young professors in Distributed Systems and I had the great pleasure of working with him at Cornell in the early 90''s. The lack of low-latency made that distributed systems (e.g.

What is DevTestOps | Role of DevTestOps in Continuous Testing


DevTestOps ensures that along with Development and Operations related tasks, the feedback on quality is continuous and given the importance it deserves. DevOps automates most of the manual operations in the software development life cycle(SDLC) which leads to faster delivery of the product.

Failure Modes and Continuous Resilience

Adrian Cockcroft

A resilient system continues to operate successfully in the presence of failures. The system needs to maintain a safety margin that is capable of absorbing failure via defense in depth, and failure modes need to be prioritized to take care of the most likely and highest impact risks.

Why Your Performance Testing Strategy Needs to Shift Left


Additionally, end users can access your site or applications from anywhere in the world using different browsers, operating systems, and mobile devices, all with varying connection speeds. Finding upper limits of your current systems for capacity planning. Analyzing server performance (CPU, memory, bandwidth, disk I/O) and database response times.

The challenges of monitoring a distributed system

Particular Software

I remember the first time I deployed a system into production. We built a custom content management website backed by a single SQL Server database. It was a typical two-tier application with a web application and a database. Once the system was deployed, I wanted to see if everything was working properly, so I ran through a simple checklist: Is my database up? Yes/No) Can my web server talk to my database?

SQL Server On Linux: Forced Unit Access (Fua) Internals

SQL Server According to Bob

Durability: “In database systems , durability is the ACID property which guarantees transactions that have committed will survive permanently. Microsoft SQL Server Database Engine Input/Output Requirements. Linux open command flag used to bypass file system cache.

Take the SQL Server Mac challenge

SQL Server According to Bob

I also started my career developing on UNIX systems with C++ and databases like Ingres. As I moved to other jobs, the PC was becoming very popular as was the Windows Operating System. While SQL Operations Studio is downloading, I can pull the docker image for SQL Server.

Back-to-the-Future Weekend Reading - CryptDB - All Things.

All Things Distributed

Werner Vogels weblog on building scalable and robust distributed systems. That goes especially for the interaction between applications and storage engines, and between applications and databases. CryptDB: Protecting Confidentiality with Encrypted Query Processing " , Raluca Ada Popa and Catherine Redfield and Nickolai Zeldovich and Hari Balakrishnan,Symposium on Operating Systems Principles Cascais, Portugal, October 2011. All Things Distributed.

How It Works (It Just Runs Faster): Non-Volatile Memory SQL Server Tail Of Log Caching on NVDIMM

SQL Server According to Bob

Create / Alter Database … LOG ON. When you create or alter the SQL Server database you simply add the LOG ON clause, pointing to the DAX enabled volume. SQL works with the operating system to detect the non-volatile storage devices and leverage them for the tail of the log.

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How Improving Website Performance Can Help Save The Planet

Smashing Magazine

The Green Web Foundation maintains an ever-growing database of web hosts who are either wholly powered by renewable energy or are at least committed to being carbon neutral. For example: Are we loading the whole of jQuery for some basic DOM operations?

Icon Library Resources - Top 20 Most Popular for 2019


Icons8 focuses on flat icons that can be used across a variety of platforms and operating systems. Freepik Like its name suggests, Freepik offers a huge database of free graphics, vectors and icons for use by web and app designers.

Expanding the Cloud for Windows Developers - All Things Distributed

All Things Distributed

Werner Vogels weblog on building scalable and robust distributed systems. s announcement of Amazon RDS for Microsoft SQL Server and.NET support for AWS Elastic Beanstalk marks another important step in our commitment to increase the flexibility for AWS customers to use the choice of operating system, programming language, development tools and database software that meet their application requirements. All Things Distributed.

Expanding the Cloud - Introducing AWS OpsWorks, a Powerful.

All Things Distributed

Werner Vogels weblog on building scalable and robust distributed systems. OpsWorks uses automation to simplify operations. Operational Control â?? For example, you can create an application that consists of multiple Python apps installed on Django connected to a CouchDB database.

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The SQL Server Basic Installer: Just Install It!

SQL Server According to Bob

And the Operating System environment for Windows Server has become more robust but has introduced more features and complexity. Here is what it looked like on my system.

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Powerful New Amazon EC2 Boot Features - All Things Distributed

All Things Distributed

Werner Vogels weblog on building scalable and robust distributed systems. A wide variety of operating systems and software configurations is available for use. with more memory or CPU), a different operating system (e.g., a Fast and Scalable NoSQL Database Service Designed for Internet Scale Applications. Job Openings in AWS - Senior Leader in Database Services. All Things Distributed.

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Expanding the Cloud: Amazon Machine Learning Service, the Amazon Elastic Filesystem and more

All Things Distributed

The Amazon Elastic File System. AWS has been offering a range of storage solutions: objects, block storage, databases, archiving, etc. Amazon EFS file systems can automatically scale from small file systems to petabyte-scale without needing to provision storage or throughput.