scheduling Archives

Tech Optimizer

April 5, 2026

Linux 7.0 Cuts PostgreSQL Performance in Half

An AWS engineer reported a significant drop in PostgreSQL throughput on Linux 7.0, with performance reduced to approximately half of its previous capability. Benchmark tests showed that the removal of the PREEMPT_NONE scheduling option was the main cause of this regression. On a 96-vCPU Graviton4 instance, throughput measured at just 0.51x compared to earlier kernel versions. Salvatore Dipietro from Amazon/AWS conducted benchmarking analysis of PostgreSQL 17, revealing that Linux 7.0 delivered only 0.51x the throughput of its predecessors. The root cause was traced to kernel commit 7dadeaa6e851, which eliminated PREEMPT_NONE as the default option, leading to increased contention due to the new PREEMPT_LAZY model. Profiling data indicated that 55% of CPU time is consumed by spinning in PostgreSQL’s spinlock, causing significant performance degradation. When a revert patch was applied, throughput rebounded to 1.94x the baseline. The decision to restrict preemption modes in Linux 7.0 aimed to address issues within the kernel's scheduling model. Dipietro proposed a patch to restore PREEMPT_NONE, but kernel developers suggested PostgreSQL adopt the rseq time slice extension instead. Database operators running PostgreSQL on Linux face potential performance reductions with the upgrade to Linux 7.0.

AppWizard

April 5, 2026

Review of ‘DoNotNotify,’ a free Android app that filters and blocks unwanted smartphone notifications.

DoNotNotify is an Android app that allows users to manage their notification settings with a high degree of customization. Key features include: - Real-time notification blocking using Android's NotificationListenerService. - Creation of deny and allow lists for specific notifications. - Support for simple partial matching and regular expression patterns to filter notifications. - Scheduling rules to be active during specific time frames. - Over 40 pre-configured rules for popular applications. - Automatic addition of relevant rules when compatible apps are installed. - Customizable notification retention and review of received alerts. - Tracking of blocked notifications through a block history feature. - Ability to import and export rules as JSON files. - Offline operation without data collection. To install the app, users can download it from the Google Play Store, enable notification access, and manage rules through the app's interface. Users can create new rules based on their notification history and customize settings, although advanced filtering may require experimentation.

Winsage

April 5, 2026

Scheduler function Windows breaks video recording on Radeon chips

Many users of graphics accelerators from a well-known company are experiencing technical issues, particularly when recording video content using OBS Studio. A YouTube channel creator analyzed this problem and identified hardware scheduling, a feature introduced by Microsoft in Windows, as the cause of frequent crashes and performance issues. This feature was meant to improve hardware performance by managing memory more efficiently for video cards, but it has led to conflicts when running demanding games and applications while capturing screens. The blogger recommends that Radeon graphics card owners disable hardware scheduling, as it only provides a minimal performance boost of about two percent in gaming, which does not outweigh the recording and streaming problems it causes.

Winsage

April 5, 2026

Scheduler function Windows breaks video recording on Radeon chips

Owners of Radeon graphics cards are experiencing technical challenges, particularly crashes and instability when using OBS Studio for video recording. The issues stem from the hardware scheduling feature in Windows, which was intended to improve performance by reducing CPU load but has instead caused conflicts during resource-intensive tasks. The creator of the YouTube channel OCExtreme recommends disabling this feature, as it only offers a minimal performance boost of about two percent, which is not worth the significant problems it causes during content recording and broadcasting.

Tech Optimizer

April 2, 2026

Norton Review 2026: Solid Antivirus With Great Safe Browsing Tools and Parental Controls

Norton Antivirus has a score of 8.3/10. It offers extensive parental controls on some plans, cloud backups for sensitive data, and a high-quality safe browser. However, its identity theft protection features are limited to US-based users, it has higher resource usage than most competitors, and reaching human customer support can be difficult. Norton began as an antivirus company in 1982 and has expanded to include a password manager, safe browser, cloud backups, and privacy monitoring tools. The LifeLock plans provide identity theft protection and insurance for US users. The antivirus software features easy setup, optimization tools for Windows and MacOS, scam detection, and privacy monitoring. Norton offers various plans, including Norton AntiVirus Plus, Norton 360 Standard, Norton 360 Deluxe, and Norton 360 with LifeLock Select Plus, each with different features and pricing. The plans can cover multiple devices, with costs starting at a competitive rate for the first year. Norton’s antivirus software includes real-time protection, manual and automated scans, and scan scheduling. Its parental controls are a notable feature, and while cloud backups are available, storage may be limited. Free tools include a password manager, data breach scan, and safe browser. Norton’s usability is straightforward, with an intuitive account setup and installation process. The antivirus operates with moderate resource usage, maintaining a low footprint during routine tasks. Norton has a strong reputation for malware detection, maintaining a perfect security ranking from AV-Test and high online detection rates from AV-Comparatives. Its password manager and backup systems use AES-256 encryption, and its VPN follows a no-logs policy. Customer support options include a community forum, knowledge base, and 24/7 live chat and phone support, though email support is not available. Norton is considered a good value for families and budget-conscious users, with pricing starting at an affordable rate for single-device coverage. It is suitable for users seeking active threat protection and parental controls, though alternatives like Bitdefender or Malwarebytes may be better for those prioritizing efficiency and advanced features.

Tech Optimizer

April 1, 2026

EDB Postgres AI for WarehousePG: Reclaiming control of the enterprise data warehouse

Many enterprises are transitioning from traditional proprietary data warehouse platforms, such as Teradata and Snowflake, due to issues like vendor lock-in, unpredictable pricing, and limited flexibility. EDB Postgres® AI (EDB PG AI) offers WarehousePG, an open-source, petabyte-scale data warehouse built on Postgres, designed to provide control, predictability, and data sovereignty while maintaining performance. WarehousePG utilizes a massively parallel processing (MPP) architecture, allowing it to efficiently execute complex queries across large datasets. It offers predictable performance without proprietary constraints, enabling organizations to avoid vendor-controlled execution engines. WarehousePG supports hybrid storage and SQL access to external data lakes through the Platform Extension Framework (PXF), simplifying ETL processes. It includes FlowServer for real-time data ingestion and supports in-database AI and machine learning, allowing for advanced analytics without transferring data outside the warehouse. The platform is engineered for high availability and enterprise readiness, with features like workload management and observability. Migration from legacy platforms is facilitated through a low-risk modernization pathway. Overall, WarehousePG provides a modern alternative to traditional data warehouses, emphasizing architectural control and open-source economics.

Tech Optimizer

April 1, 2026

Norton Review 2026: Solid Antivirus With Great Safe Browsing Tools and Parental Controls

Norton Antivirus has a score of 8.3/10. It offers extensive parental controls on some plans, cloud backups for sensitive data, and a high-quality safe browser. However, its identity theft protection features are limited to U.S. users, it has higher resource usage than most competitors, and reaching human customer support can be difficult. Norton provides a comprehensive cybersecurity suite that includes a password manager, safe browser, cloud backups, and privacy monitoring. Its antivirus software features real-time protection, manual and automated scans, and scan scheduling. Norton Family allows parents to implement controls on children's devices. Norton does not offer a free version but provides complimentary tools such as a password manager and data breach scan. Norton AntiVirus Plus is priced for basic security needs, while Norton 360 Standard and Deluxe offer additional features like dark web monitoring and enhanced parental controls. The setup process is user-friendly, and the software operates smoothly with moderate resource usage during scans. Norton’s additional tools include device optimization, a safe browser, and a privacy monitor, though some features may not meet expectations. Norton has received high marks in security rankings, maintaining a perfect security ranking from AV-Test for the past decade. It employs strong encryption protocols for its tools and adheres to a no-logs policy for its VPN. Customer support options include a community forum, knowledge base, and 24/7 live chat and phone support, though email support is absent. Norton’s pricing is competitive, especially for families, and it can cover up to 10 devices depending on the plan.

Tech Optimizer

March 31, 2026

Best Antivirus Software That Won’t Slow Down Your Computer

Laptops are essential tools that carry sensitive data, making security crucial. Public networks and unsecured Wi-Fi can expose this data to threats. Antivirus software protects laptops by detecting threats, blocking malware, and removing infections. The best antivirus solutions operate quietly in the background without affecting system performance. Top antivirus software includes: - Bitdefender: Strong malware detection, real-time scanning, minimal system impact; some features are exclusive to higher subscriptions. - Surfshark One: Combines antivirus protection with a VPN; lacks some advanced features. - Norton: Comprehensive suite with various security tools; higher renewal fees after the first year. - Avast: Lightweight protection with extra tools; limited features in the free version. Key features to look for in antivirus software include strong malware detection, real-time monitoring, phishing filters, and compatibility across devices. Performance varies, with some tools consuming more resources than others. Users should be cautious of renewal terms and additional features that may not be necessary. Common mistakes after installing antivirus include assuming complete protection, neglecting subscription monitoring, and risky online behaviors. When switching antivirus software, users should properly remove the old software and manage subscriptions to avoid unnecessary costs. Regular updates are essential for effective protection, and free antivirus tools may lack advanced features. Antivirus effectiveness can vary by device, and some products may slow down older devices. Monitoring update status and active features is crucial for verifying antivirus functionality.

Tech Optimizer

March 31, 2026

Norton Review 2026: Solid Antivirus With Great Safe Browsing Tools and Parental Controls

Norton Antivirus has a score of 8.3/10. It offers extensive parental controls, cloud backups for sensitive data, and a high-quality safe browser. However, its identity theft protection features are limited to US users, it has higher resource usage than competitors, and reaching human customer support can be challenging. Norton provides various cybersecurity tools, including a password manager, safe browser, and privacy monitoring tools. Its antivirus software includes real-time protection, automated scans, and optimization tools for Windows and MacOS. The plans available include Norton AntiVirus Plus, Norton 360 Standard, Norton 360 Deluxe, and Norton 360 with LifeLock Select Plus, each with varying features and pricing. Norton’s usability is straightforward, and it operates smoothly with moderate resource usage during scans. The service has a strong reputation for malware detection and solid privacy policies, though customer support lacks email options. Overall, Norton is suitable for families and users seeking robust online protection, but alternatives may offer better resource efficiency.

AppWizard

March 27, 2026

One UI 9 could simplify Galaxy phone repairs with a new built-in support hub

Samsung is developing a Warranty & Care app as part of One UI 9 to streamline device repairs and warranty claims. The app will feature a main screen displaying warranty status, a search bar for troubleshooting, and a Diagnostics shortcut linking to the Samsung Members app. Future enhancements may include estimating repair costs, scheduling service center appointments, and tracking claim progress. The app aims to promote self-service capabilities and will incorporate customer support access through chatbots and remote assistance. Many features are still in development, and the app is not yet ready for widespread use. Its availability may depend on the condition of the user's device, and while features are suggested, there is no certainty they will be included in the final release.