CPU utilization Archives

Winsage

May 8, 2026

Microsoft Is Testing a Windows 11 Feature That Maxes Out CPU Speed for Faster App Launches

Microsoft is developing a feature called the "Low Latency Profile" for Windows 11, part of the Windows K2 initiative, aimed at enhancing app launch speeds by temporarily boosting the CPU core to its maximum frequency for 1 to 3 seconds. This feature has shown to reduce launch times of Microsoft’s in-box applications, such as Edge and Outlook, by approximately 40%, and improve the speed of system functions like the Start Menu and context menus by up to 70%. While this approach may increase CPU temperatures and potentially drain battery life faster on laptops, it is expected that the benefits in performance will outweigh the drawbacks. The Low Latency Profile is similar to previous Microsoft efforts, such as preloading the File Explorer at startup, and aims to optimize CPU performance for short durations without significantly impacting user experience.

Winsage

April 22, 2026

I just found out the creator of Windows Task Manager accidentally left his phone number inside the app

Dave Plummer, the creator of the original Task Manager at Microsoft in the 1990s, encountered an issue where CPU utilization readings occasionally exceeded 100%, which he suspected was a bug in the kernel. Despite being a user interface designer and facing skepticism from the kernel team, he implemented 'asserts' in the code to diagnose the problem. One assertion specified that CPU usage should not exceed 100%, and he embedded his name and home phone number in the code for anyone who might encounter the issue. No one ever contacted him about the bug, and it remained unresolved until the kernel developers identified and fixed it later.

Winsage

April 22, 2026

‘A performance tool that requires a graduate seminar before breakfast has already lost the room’: Why Windows Task Manager looks like it’s getting CPU usage wrong

Users have expressed frustration with Windows 11's Task Manager CPU usage reporting, believing it relies only on base clock speeds. Dave Plummer, the original architect of Task Manager, indicated that discrepancies may arise from average calculations and inherent compromises in the metrics. In response, Microsoft announced a fix in a recent Preview build, stating that Task Manager will now use standard metrics for CPU utilization across all pages to align with industry standards. Plummer also suggested a distinct Windows mode for power users to enhance flexibility.

Winsage

April 20, 2026

Original Task Manager creator explains why it lies to you about CPU usage — former Microsoft engineer shows unique solution to a seemingly simple, but actually complicated, task

Dave Plummer, a former Microsoft engineer and architect of the original Task Manager, explained the complexities of measuring CPU usage. He noted that the process is not as simple as it seems, as CPU activity can vary across different cores and the timing of measurements can influence results. The Task Manager accounts for various states of CPU activity, including user mode, kernel mode, interrupt time, deferred procedure calls, and idle loops, making the measurement of CPU utilization a complex task rather than a straightforward one.

Tech Optimizer

April 8, 2026

PostgreSQL logical replication: How to replicate only the data that you need

Many organizations using PostgreSQL face challenges in replicating data across different logical databases while controlling shared information. PostgreSQL 15 introduces native logical replication with column-level and row-level filtering within publications, allowing precise control over data transfer between PostgreSQL databases. Logical replication operates on a publish-subscribe model, where the source database logs changes to the Write-Ahead Log (WAL) and applies publication filters to transmit only the relevant data to the target database. Two filtering modes are available: column-level filtering allows users to specify which columns to replicate, while row-level filtering uses WHERE clauses to determine which rows to include. Both filtering modes can be combined in a single publication. The SQL syntax for creating publications and subscriptions is consistent across various PostgreSQL environments, with specific configurations required for enabling logical replication. Use cases for logical replication include multi-tenant SaaS data isolation, regional data distribution for ecommerce, PCI DSS compliance in financial services, development and testing environments, and retail inventory management. Prerequisites for implementing logical replication include using PostgreSQL 15 or later, ensuring network connectivity, having a user with replication privileges, enabling logical replication on the source instance, and monitoring WAL retention. Logical replication has limitations, such as the need for a replica identity for UPDATE and DELETE operations, the non-replication of DDL changes and sequences, and potential performance overhead during initial synchronization and ongoing replication. After testing, it is advisable to clean up by removing replication resources to prevent unnecessary costs.

Winsage

March 6, 2026

Windows Server 2025 Native NVMe: Storage Stack Overhaul and Benchmark Results

On December 15, 2025, Microsoft announced native NVMe support in Windows Server 2025, marking a significant evolution in data management and access. The new architecture replaces Disk.sys with NVMeDisk.sys, allowing direct communication from the filesystem to hardware via StorMQ, eliminating latency and enhancing performance. Testing revealed increased read speeds, particularly in random 4K and 64K benchmarks, with significant reductions in average read latency and lower CPU usage during sequential operations. Write operations showed modest improvements. A registry modification is required to enable this feature, and caution is advised due to potential complications with NVMe drives when deduplication is enabled.

Tech Optimizer

March 4, 2026

Troubleshoot RDS PostgreSQL High CPU Utilization

Vetrivel presents a guide on troubleshooting high CPU utilization in Amazon RDS and Amazon Aurora PostgreSQL-Compatible databases, focusing on three primary techniques to identify CPU spikes: 1. **Amazon CloudWatch**: Provides real-time monitoring and operational data to visualize CPU utilization trends and identify anomalies. 2. **Enhanced Monitoring**: Offers deeper insights into performance metrics for a more granular analysis of CPU usage. 3. **Database Engine Insights**: Allows diagnosis of performance issues directly through the database engine for better workload management. The video is segmented into chapters for easy navigation, covering the methods in detail.

Winsage

December 19, 2025

Windows Server 2025 gains native NVMe support, 14 years after its introduction — groundbreaking I/O stack drops SCSI emulation limitations for massive throughput and CPU efficiency gains

Windows Server 2025 now supports native NVMe I/O, moving away from SCSI bus commands. This feature requires a registry key modification or group policy MSI to activate. Users can see performance improvements of up to 80% in IOPS and a 45% reduction in CPU utilization during high I/O loads. Testing on a two-socket Intel system with 208 logical cores and a Solidigm D7-PS1010 SSD showed a 45% increase in IOPS with one thread, 78% with eight threads, and 71% with 16 threads, alongside a 41% and 47% decrease in CPU load during 4K random reads with eight and 16 threads, respectively. The I/O processing workflow has been redesigned for better performance, enhancing overall latency and responsiveness. Community feedback is mixed, with some users experiencing negligible differences and others suggesting that only PCIe 5.0 NVMe devices can fully utilize the new I/O stack. There is no timeline for this feature's rollout to Windows 11, and its effectiveness may vary based on drive firmware quality. Home computing tasks may not see significant improvements, but multitasking and gaming experiences could benefit from reduced CPU load and improved system responsiveness.

Tech Optimizer

December 18, 2025

Improve Aurora PostgreSQL throughput by up to 165% and price-performance ratio by up to 120% using Optimized Reads on AWS Graviton4-based R8gd instances

AWS has introduced Graviton4-based R8gd instances for Amazon Aurora, which offer significant performance enhancements over Graviton2-based db.r6g instances. Users can expect up to 165% higher throughput, a 120% improvement in price-performance ratio, and an 80% enhancement in application response time. The integration of an Optimized Reads-enabled tiered cache allows for expanded database caching capacity, minimizing network storage access and improving query response times. Organizations like Mindbody and Claroty have reported substantial performance improvements and cost savings after implementing these features. Aurora PostgreSQL 17 has introduced smarter storage batching algorithms and optimized writes, further enhancing performance for I/O-intensive applications. The db.r8gd instances allow for scaling up to 48xl, providing 192 vCPUs, 50 Gigabits of network bandwidth, and 10.4 TiB of local NVMe capacity. The benchmark testing using HammerDB demonstrated significant improvements in throughput, price-performance ratio, and response times when upgrading from db.r6g to db.r8gd instances. The Aurora Optimized Reads-enabled tiered cache is available for Aurora PostgreSQL versions 17.4 and higher, among others.

Winsage

December 17, 2025

Windows Server 2025 Gets Native NVMe SSD Support After 12 Years

Microsoft has introduced native NVMe SSD support in Windows Server 2025 as an opt-in feature, marking a significant advancement 12 years after NVMe's inception. This new support allows direct multi-queue access to hardware, delivering up to 3.3 million IOPS on PCIe Gen 5 SSDs and over 10 million IOPS on Host Bus Adapters, while significantly reducing latency. The previous reliance on converting NVMe commands to SCSI commands caused processing latency and overhead. Native NVMe support eliminates outdated translation layers, enhances CPU utilization, and unlocks next-generation storage capabilities. Microsoft has set up an email address, nativenvme@microsoft.com, for user feedback and inquiries. There is no current information on the timeline for native NVMe support in Windows 11.