Tag: Linux

Feed: AWS Partner Network (APN) Blog. Author: Joanne Moore. By Joanne Moore, Sr. Launch Product Manager – AWSBy Jim Weingarten, Sr. Partner Development Specialist – AWS Amazon Linux 2 provides a secure, stable, and high-performance execution environment to develop and run cloud and enterprise applications. We are excited to announce the updated Amazon Linux Ready Program, which will now validate AWS Partner software products that run on Amazon Linux 2 as well as the next-generation Amazon Linux 2022. Amazon Linux 2 Partner software products have been technically validated by Amazon Web Services (AWS) to follow security, availability, reliability, performance, and other architectural ... Read More

Feed: Recent Announcements. Today, we are announcing the public preview of Amazon Linux 2022 (AL2022), Amazon's new general purpose Linux for AWS that is designed to provide a secure, stable, and high-performance execution environment to develop and run your cloud applications. Starting with AL2022, a new Amazon Linux major version will be available every two years and each version will be supported for five years. Customers will also be able to take advantage of quarterly updates via minor releases and use the latest software for their applications. Finally, AL2022 provides the ability to lock to a specific version of the ... Read More

Feed: Recent Announcements. Amazon Linux 2 is now available with an updated Linux kernel (5.10) as an Amazon Machine Image (AMI). Kernel 5.10 brings a number of features and performance improvements, including optimizations for Intel Ice Lake processors and AWS Graviton2 processors powering the latest generation Amazon EC2 instances. Live patching for Kernel 5.10 is supported in Amazon Linux 2 for both x86 and ARM architectures. The updated kernel 5.10 includes various security features including WireGuard VPN that helps setup a virtual private network with low attack surface and allows encryption with less overhead compared to alternatives. The updated kernel brings a ... Read More

Feed: Recent Announcements. Amazon AppStream 2.0 adds support for Amazon Linux 2. With this launch, you can now stream Linux applications and desktops to your users, and greatly lower the total streaming cost by migrating Matlab, Eclipse, Firefox, PuTTY, and other similar applications from Windows to Linux on Amazon AppStream 2.0. You can now stream Linux-compatible apps to your users in the same simple way you currently stream Windows apps, at a lower hourly rate, charged per second, and with no per user fee. With Linux application streaming, you can transform your application delivery into software as a service (SaaS) ... Read More

Feed: Planet PostgreSQL. This blogpost is about linux memory management, and specifically about the question that has been asked about probably any operating system throughout history: how much free memory do I need to consider it to be healthy? To start off, a reference to a starwars quote: 'This is not the free memory you're looking for'. What this quote means to say is that whilst the free memory statistic obviously shows free memory, what you are actually looking for is the amount of memory that can be used for memory allocations on the system. On linux, this is not ... Read More

Feed: Planet PostgreSQL. Often users come to us with incidents of database crashes due to OOM Killer. The Out Of Memory killer terminates PostgreSQL processes and remains the top reason for most of the PostgreSQL database crashes reported to us. There could be multiple reasons why a host machine could run out of memory, and the most common problems are: Poorly tuned memory on the host machine. A high value of work_mem is specified globally (at instance level). Users often underestimate the multiplying effect for such blanket decisions. The high number of connections. Users ignore the fact that even a ... Read More

Feed: Planet PostgreSQL. This blogpost is about doing buffered writes to a linux filesystem, and latency fluctuations that it could show you, especially when performing a lot of writes, and other implications. The first thing to discuss is buffered writes. Any write to a linux local filesystem is done 'buffered', unless explicitly defined it not to, which is done by opening the file with the O_DIRECT flag. So all file interactions from the shell likely are done buffered, and the Postgresql database is also using buffered IO. What happens when you perform a buffered write is that you don't actually ... Read More

Feed: Recent Announcements. AWS Launch Wizard offers a guided way of sizing, configuring, and deploying AWS resources for third party applications such as Microsoft SQL Server Always On, allowing you to get your deployments up and running within a few hours. With this launch, you can now leverage the same ease of use to perform SQL Server Always On deployments on Red Hat Enterprise Linux, without the need to manually provision and configure individual AWS resources. AWS Launch Wizard for SQL Server is available at no additional charge. You only pay for the AWS resources that are provisioned for running ... Read More

Feed: Planet PostgreSQL. Upgrading one’s operating system to new major version is an important system maintenance task and it’s usually a good thing. It brings new features, security improvements, access to newer packages and so on. Sometimes it doesn’t go that smoothly, for example the updated system will refuse to start. But upgrading the OS running a Postgres cluster and involving a glibc library version update, or migrating a database to another machine running another OS (and glibc) version poses a little known, but very significant risk… The disease The technical reasons behind the problem are very well explained in ... Read More

Feed: Recent Announcements. Amazon EC2 now supports Hibernation for On-Demand Nitro-based instances running Red Hat Enterprise Linux (RHEL) version 8, CentOS version 8, and Fedora version 34 onwards. Hibernation allows you to pause your EC2 Instances and resume them at a later time, rather than fully terminating and restarting them. Resuming your instance lets your applications continue from where they left off so that you don’t have to restart your OS and application from scratch. Hibernation is useful for cases where rebuilding application state is time-consuming (e.g., developer desktops) or an application’s start-up steps can be prepared in advance of ... Read More