records Archives

Tech Optimizer

September 1, 2026

Connecting My LangGraph AI Agent to Postgres

A stateful LangGraph agent was developed to streamline a 15-minute booking process, featuring a user-friendly Streamlit UI and a backend powered by a Postgres database. The agent responds to customer queries, calculates service pricing, manages service acceptance, suggests time slots, and confirms appointment details. It operates in two modes: in-memory for rapid testing and Postgres for persistent storage. Testing can be done locally using Docker, which simulates a Postgres environment, or with a hosted Postgres instance. The project includes a docker-compose.yml file to initiate a PostgreSQL 16 container, allowing the application to connect to the database. Data persistence is ensured through Docker volumes, and the application can be run with specific commands after setting up the environment variables. The system has been tested successfully, demonstrating its ability to manage bookings and maintain data integrity across sessions. Future enhancements are planned to improve the booking workflow and integrate additional communication channels.

Tech Optimizer

September 1, 2026

Autoscaling Lakebase Postgres

Choosing a database instance size without prior knowledge of the workload can lead to inefficiencies and excessive compute usage. Lakebase Postgres addresses this with an autoscaling feature that eliminates manual sizing, utilizing in-place VM resizing and a monitoring algorithm for CPU, memory, and working set size. Lakebase Postgres separates compute and storage layers, allowing independent resizing of compute nodes without affecting the database. The autoscaling algorithm relies on three signals: CPU load (cpuGoalCU), memory use (memGoalCU), and compute-cache working set size (lfcGoalCU). The CPU load is monitored every five seconds, aiming to maintain it at or below 90% capacity. Memory usage is tracked at two frequencies: overall memory every five seconds and Postgres-specific memory every 100 milliseconds, with a goal to keep usage below 75% of allocated RAM. The compute cache evaluates active data access efficiency, adjusting size based on workload. The working set is estimated using a modified HyperLogLog algorithm that records timestamps for page accesses, allowing for distinct page estimates over various time frames. The algorithm projects future working-set growth to allocate sufficient cache while capping it at 75% of RAM. Resizing the compute involves four components: the autoscaler-agent, vm-monitor, Kubernetes scheduler, and NeonVM. Scaling up occurs when any of the three goals indicate a need for more resources, while scaling down includes verification to ensure sufficient memory remains for operations. Timely adjustments in both directions are prioritized to minimize costs.

Winsage

September 1, 2026

Windows bug incorrectly tells users that Microsoft Defender Antivirus is turned off

Microsoft Defender's reliability is under scrutiny due to a recent security alert that affects a wide range of Windows versions, including both Windows 11 26H1 and Windows Server 2012. Insurers will require more than verbal assurances about software performance in six months, necessitating the archiving of telemetry data, including sensor check-ins and Defender versions, by Chief Information Security Officers (CISOs). The alert's impact is significant, as a single flaw in Defender can affect various systems categorized into different patch rings, highlighting the need for vigilant monitoring and proactive management of security protocols.

Tech Optimizer

August 29, 2026

Databricks Unveils Lakebase Postgres

Lakebase Postgres features a two-layer architecture that separates operations for durability and scalability. The compute layer uses standard Postgres for SQL parsing, query planning, and execution, designed to be ephemeral for dynamic scaling. The storage layer ensures correctness, durability, and historical accuracy, consisting of three components: Safekeepers replicate Write-Ahead Logging (WAL) records using a quorum-based protocol; Pageserver transforms WAL records into page versions; and Object Storage retains materialized versions and historical states in an immutable format. This architecture enhances data durability and system scalability.

Tech Optimizer

August 26, 2026

AVG Antivirus Review 2026: Is the Free Version Enough?

AVG AntiVirus Free has an overall rating of 4.2 out of 5 stars, with specific scores of 4.7 for protection, 4.3 for performance and features, and 3.5 for customer support. The software is available for free or can be purchased starting at .88 for the first year, with pricing verified in August 2026. It achieved a 99.77% malware detection rate with only four false alarms and offers features such as real-time protection and Ransomware Protection. However, customer support is rated lower, and there are upselling prompts after scans. AVG is owned by Gen Digital and has been in operation for over 35 years, originally founded as Grisoft in the Czech Republic. The free version includes essential features like File Shield, Behavior Shield, Web Shield, Email Shield, and Ransomware Protection, while some features like Enhanced Firewall and Fake Website Shield are exclusive to paid versions. AVG's performance on Windows 11 has been validated by independent tests, scoring 6/6/6 in AV-TEST and achieving a 96.3% offline detection rate in AV-Comparatives. The software is available across multiple platforms, including Windows, Mac, Android, and iOS. AVG's customer support includes email and phone options, with a reasonable response time. The software is safe to install when downloaded from official sources, and it has been recognized for its effectiveness in malware detection.

AppWizard

August 26, 2026

A mysterious app just showed up on your Android phone, and it’s watching your battery

Android Pulse is a diagnostic tool distributed by Google since March, which has recently become visible to the public and is now on over 10 million devices. It operates without a user interface and monitors software for unusual system resource consumption. The app first appeared in March with seven builds before being listed in the Play Store. On Pixel devices, it is found in system settings, while on others, it appears as a blank square in the update queue. There was no formal announcement regarding its rollout. Europe has enacted regulations to enhance user control over devices, but essential system applications like Android Pulse are exempt from easy uninstallation. There is no evidence that Android Pulse poses a danger, but its late visibility raised user concerns.

Tech Optimizer

August 26, 2026

How to Protect Against Ransomware: 13 Steps [2026]

Global ransomware attacks increased by 0.8% quarter-over-quarter in Q2 2026. The group Qilin has 279 confirmed victims, maintaining its position as the leading threat actor for four consecutive quarters. The rival group The Gentlemen saw a 62% increase in victims, reaching 269. Checkpoint Research's report indicates a shift in the ransomware landscape, challenging the narrative of declining attacks. IBM's analysis shows breaches within supply chains and third-party vendors have quadrupled over the past five years. Effective ransomware protection requires administrative access to endpoints, firewalls, and backup systems, along with specific software versions and tools. The 3-2-1-1-0 backup strategy is recommended, emphasizing offline, immutable backups. Organizations should implement multi-factor authentication (MFA) across all access points and actively patch known vulnerabilities. Network segmentation is crucial to limit ransomware spread, and canary files can provide early warnings of attacks. Regular phishing simulations and a well-documented incident response plan are essential for preparedness.

AppWizard

August 25, 2026

Nearly 500k players showed up for the Wardogs beta: ‘The reaction from the FPS community has been insane’

Wardogs is a 100-player military simulation first-person shooter (FPS) that has gained over a million wishlists and conducted a successful closed beta with nearly 500,000 participants and peak player counts exceeding 100,000 on Steam. The game features an innovative economic system where players manage a persistent in-game wallet to purchase weapons, unlock gear, and tip or bribe for assistance. Wardogs is set to launch in early access on September 10.

AppWizard

August 23, 2026

Manic Android Malware Exfiltrates Data From Offline Phones via Nearby Infected Devices

A new Android malware threat, codenamed Manic, poses significant risks to Ukrainian banks, government services, and messaging applications, with a reach extending to Russian and European financial institutions, global fintech platforms, cryptocurrency services, and military communication channels. Manic combines Android banking malware and mobile spyware, targeting sensitive applications and enabling comprehensive device takeover. It features a novel Wi-Fi mesh technique for data relay through compromised devices and utilizes phishing sites and dropper apps. The malware originated in February 2026, with initial development leading to its first deployment by late May. It monitors 169 package IDs related to banks, payment services, and messaging applications, primarily affecting Ukrainian targets but also impacting applications in Russia and Europe. Manic can infiltrate commercial and military messaging apps, track locations, monitor notifications, and collect files. It exploits Android's accessibility services to capture sensitive data and employs a store-and-forward relay mechanism for data exfiltration through nearby compromised devices. Google has stated that no apps containing this malware are found on Google Play, and Android users are protected by Google Play Protect.

Tech Optimizer

August 22, 2026

Best Ransomware Protection 2026: Tested and Ranked

Ransomware protection is best approached as a layered strategy rather than relying on a single solution. The effectiveness of software is significantly enhanced by maintaining a well-managed backup that is disconnected during an attack. Five tools were evaluated based on their default settings, focusing on behavioral detection, protected folders, file rollback, and real-time protection. 1. Norton 360: Rated as the best overall ransomware protection, it offers comprehensive features including behavioral monitoring, protected folders with dual alert modes, and 50 GB of cloud backup within a single subscription. It has a perfect score in advanced threat assessments. 2. Bitdefender: Recognized for its file rollback and remediation capabilities, it provides an effective "undo" feature that restores files, although this feature is turned off by default. 3. Avast One Free: The best free ransomware protection option, it includes a dedicated shield on the free Windows tier and has achieved a perfect score in advanced threat assessments. 4. NordVPN Threat Protection Pro: Best for blocking the delivery route of ransomware, it prevents downloads before encryption starts but cannot stop the process once it has begun. 5. McAfee: Best for protecting multiple devices simultaneously, it offers unlimited device coverage on most plans with integrated ransomware defense in its scanning engine. Modern ransomware protection software has shifted from signature matching to focusing on monitoring the behavior of processes interacting with files. The four essential layers of protection include behavioral monitoring, protected folders, automatic file rollback, and backup. Most users do not need a separate anti-ransomware product, as these features are typically included in main antivirus suites, with the key consideration being whether these features are activated. The rankings of the tools were based on whether the ransomware protection layer is enabled by default, the extent of file recovery when intervention occurs, and the frequency of false positives during normal use. - Norton 360: Best overall, with protection enabled by default and a perfect score in advanced threat testing. - Bitdefender: Best for file rollback, but the rollback feature is disabled by default. - Avast One Free: Best free option, with a perfect score in advanced threat assessments but lacks rollback capabilities. - NordVPN Threat Protection Pro: Effective at blocking malware downloads but does not provide rollback or backup features. - McAfee: Suitable for families with multiple devices, offering automatic backup of flagged files but lacks user-configurable protected folder options. The effectiveness of ransomware protection tools is primarily assessed through behavioral responses rather than library matching. Backup remains a critical layer of defense, functioning even when other layers fail.