Ask Noah Show

This week Steve gives us a deep dive into performance tuning, and we talk about how your body's memory functions.

-- During The Show --

00:50 Intro

Subsisting greeting variables

Accessible memory

Strength of memory

Reading and writing builds "Accessible memory"

Teaching builds "Strength of memory"

Go look up "space repetition"

Reader come home book

YouTube if you check their sources

17:55 News Wire

OpenSSL Security Update - github.com

Git 2.56 - github.blog

Thunderbird 157 - thunderbird.net

Firefox 157 firefox.com - firefox.com

Shotcut 26.9 - phoronix.com

Tails 7.14 - torproject.org

Parrot OS 7.4 - parrotsec.org

OpenMandriva ROME 26.09 - openmandriva.org

Nitrux 7.0 - opensourcefeed.org

Antix 26.1 - antixlinux.com

SMTP Backdoors - infosecurity-magazine.com

COSMIC Desktop No Longer Accepts AI Content - reddit.com

Beam AI - fortune.com

Google Halts Open Source Bug Bounty Program - bleepingcomputer.com

19:15 Performance Tuning

Defaults are someone guessing at a "safe option"

Three hosts being tuned

NAS (file server)

vHost (virtual disks live here)

Container Host

When should you performance tune?

Broadcasting

Networks (ISPs)

The more "dense" the more benefits

TuneD

ZFS "Adaptive Replacement Cache" (ARC)

Default is 50% of RAM

Swap file

System doesn't empty on its own

ARC stats

Hits and misses

Resets on reboot

Memory pressure

Swapyness

60 is the default

the "cliff rate"

Tuned to around 10%-30% on "performance profiles"

System starts swapping before you hit zero RAM

ZFS record size

Record size is the "Maximum" not "Fixed size"

Media Library 1M

Postgres 16K

ZFS write amplification (8k writes to 1M records hurt)

AI study bot rules

Man systemd.directives

Write in and tell us if you want more!

Extra Credit: What to search after the show

ZFS ARC Tuning

ZFS Record Size

ZFS send receive preserves record size

Record size is per "data set" not directory

Record size only affects new writes

"zfs_dirty_data_max" vs "vm.dirty_ratio"

"QEMU "cache=none" O_DIRECT"

Postgres on NFS PGDATA caveats

"Tuned-adm virtual-host" hypervisor profile (The one nobody mentions)

Tuned profile format "sysctl" vs "main" the plugin/argument split

NFS mount options (the client side fix)

"vmstat" reading swap columns correctly

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This week Steve gives a brief overview into human factors that lead to distraction, Steve finally finds a use for KDE and we talk IP cameras and NVRs!

-- During The Show --

00:50 distractions

Human minds work kinda like RAM

Learning how to learn

Computers are terrible for learning

Short term memory slots

Long term memory slots

Noah's method

Typing vs writing

Always outliers

Minimizing distractions

Non-constructive hobbies

19:30 Steve's Use for KDE

Nvidia Shield

Plasma Big Screen

Comes with everything

Steve's customisation

Early days

Pro series Nvidia Shield

Special "DRM Code"

Vero V

Waydroid

Emulator vs Browser DRM

30:00 efivarfs full - John

Screenshot

EFI vars partition

Proceed with caution

33:45

Frigate

ONVIF compliant cameras

Isoloate camera's from the internet

POE ReoLink cameras

Axis cameras

Axis P3226

Cameras with SD cards

OpenSurv

ANS 483

ANS 474 - drive longevity, replacement strategies, and setup maintenance

ANS 404 - Steve's personal adventures and configuration tips using Frigate

ANS 402 - hardware demands of running Frigate, noting performance hurdles

46:50 News Wire

Systemd 262 - phoronix.com

GNU Cash 5.17 - gnucash.org

Peazip 11.3 - github.io

GNU wget 2.3 - gnu.org

Gnome 50.5 - gnome.org

Mir 2.30 - canonical.com

Cosmic 1.9 - phoronix.com

Gravity Linux - github.com

File notification system vulnerability - techxplore.com

New Spectre Vulnerability - thehackernews.com

10 Second Kernel Compile Times - tomshardware.com

Dutch Government Linux - trendingtopics.eu

The GNU project has turned 43.

48:28 Chrome Web Browser

Chrome caused KDE Plasma to crash

Culprit is Chrome 154.0.8037.57

Symptom is screen locker malfunctions

-- The Extra Credit Section --

For links to the articles and material referenced in this week's episode check out this week's page from our podcast dashboard!

This Episode's Podcast Dashboard

Phone Systems for Ask Noah provided by Voxtelesys

Join us in our dedicated chatroom #GeekLab:linuxdelta.com on Matrix

-- Stay In Touch --

Find all the resources for this show on the Ask Noah Dashboard

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Need more help than a radio show can offer? Altispeed provides commercial IT services and they’re excited to offer you a great deal for listening to the Ask Noah Show. Call today and ask about the discount for listeners of the Ask Noah Show!

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-- Twitter --

Noah - Kernellinux

Ask Noah Show

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This week Mike McGrath Vice President, Core Platforms for Red Hat joins us to give us the deep dive on Lightwell!

-- During The Show --

00:50 Intro

Iron sharpens Iron

Feedback

01:50 Show Feedback - Joshua

Talking fast at the end of the show

Inserting tutorial style content

04:05 Lightwell Interview

Mike McGrath - Vice President, Core Platforms

What is Red Hat Lightwell

Where Lightwell came from

Illustration scenario

Using AI but interfacing "Human to Human"

Two tiers of Lightwell

Lightwell "Network" repo

Lightwell "Remediated" repo

Lightwell "Undisclosed" repo

How it works

Does Lightwell address compliance requirements?

Remediation

What does using Lightwell look like?

Software Bill of Materials

Clearing house with SLA

Details really matter

Package versioning

Scanner false positives based on versioning

OSV.dev, Vulnerability Exploitability eXchange (VEX) data

Open Source packages, scanning and remediation

How often does upstream reject patches?

Has Lightwell opened doors?

Any notable success stories?

What does Lightwell's roadmap look like?

Where is Lightwell appropriate?

What metrics and KPIs should IT leaders look for?

Walk me through a typical developer workflow

Cost benefit analysis

How does Lightwell integrate with existing Red Hat products?

Previously on ANS 343, ANS 416, ANS 443, ANS 494

43:55 News Wire

GNU Core Utils 9.12 - phoronix.com

Calibre 9.15 - https://calibre-ebook.com/whats-new

Thunderbird 156 - thunderbird.net

Firefox 156 - firefox.com

Gnome 51 - gnome.org

Q4OS 6.9 - q4os.org

Garuda Nix - garudalinux.org

MXLinus 25.3 - mxlinux.org

Ovirt-engine on Oracle Linux - oracle.com

Qwen Image 2.1 - qwen.ai

US District Court AI Ruling - devops.com

45:10 Microsoft Ports Co-pilot with Ai

$120,000 in AI tokens spent to port

800,000 lines of code

5,300 human hours to review

16x faster based on benchmarks

Reaction of an actual developer

Can't put toothpaste back in the tube

Effect of Microsoft doing this

The Register

-- The Extra Credit Section --

For links to the articles and material referenced in this week's episode check out this week's page from our podcast dashboard!

This Episode's Podcast Dashboard

Phone Systems for Ask Noah provided by Voxtelesys

Join us in our dedicated chatroom #GeekLab:linuxdelta.com on Matrix

-- Stay In Touch --

Find all the resources for this show on the Ask Noah Dashboard

Ask Noah Dashboard

Need more help than a radio show can offer? Altispeed provides commercial IT services and they’re excited to offer you a great deal for listening to the Ask Noah Show. Call today and ask about the discount for listeners of the Ask Noah Show!

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-- Twitter --

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Ask Noah Show

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Special Guest: Mike McGrath.

This week Steve gives the deep dive into the reason and the how for documentation. It's an essential thing in any IT environment, it doesn't get nearly enough love so we shine a spotlight on it.

-- During The Show --

00:45 Intro

Sound effects

RPG Web UI

Never Winter Nights

Kansas City

Steve and traveling

09:18 News Wire

GTK 4.24 - gnome.org

Shotwell 33 - gnome.org

Agama Installer 24 - github.io

Cosmic v1.8 https://www.phoronix.com/news/COSMIC-Epoch-1.8

Debian 13.7 Trixie - debian.org

MocaccinoOS 26.09 - mocaccino.org

DietPi 10.7 - dietpi.com

KaOS 2026.09 - kaosx.us

Ubuntu 24.04.5 - phoronix.com

Sandbox Challenge - securityweek.com

Lunar Exploration Model - ibm.com

CUDA-Q Expands - nvidia.com

10:30 Documentation

Document "why" something was done

Assumption and argument

What needs to be documented

Reproducer - Blow it away and set it up again

Document everything

Why do people resist documenting

Executive vs Technical Summaries

Tribal knowledge

Styles of documentation

White papers

CMA

What should you NOT document

Process of documenting

Where do you document

Wiki.js

Markdown

Steve's container documentation

Steve's GitHub

Steve's Red Hat profile

Hackaday

-- The Extra Credit Section --

For links to the articles and material referenced in this week's episode check out this week's page from our podcast dashboard!

This Episode's Podcast Dashboard

Phone Systems for Ask Noah provided by Voxtelesys

Join us in our dedicated chatroom #GeekLab:linuxdelta.com on Matrix

-- Stay In Touch --

Find all the resources for this show on the Ask Noah Dashboard

Ask Noah Dashboard

Need more help than a radio show can offer? Altispeed provides commercial IT services and they’re excited to offer you a great deal for listening to the Ask Noah Show. Call today and ask about the discount for listeners of the Ask Noah Show!

Altispeed Technologies

Contact Noah

live [at] asknoahshow.com

-- Twitter --

Noah - Kernellinux

Ask Noah Show

Altispeed Technologies

This week Noah and Steve get into a fireside chat about Ai. Where is it okay to turn it loose, and where do some guardrails need to be in place?

-- During The Show --

00:50 Intro

Butterfly Effect movie

Open AI models and weights

Effect of trying to squeeze out open source

04:48 Cyclical computing - David

The new topology

Normal people vs home lab

Long way to go

Hardware costs

Restricting doesn't work

AI and responsibility

20:50 News Wire

Audacity 4.0 - audacityteam.org

Firefox 155 - firefox.com

Thunderbird 155 - thunderbird.net

Mir 2.29 - canonical.com

Curl 8.22 - daniel.haxx.se

Docker 29.8 - docs.docker.com

OpenVPN 2.7.7 - openvpn.net

Linux 7.1 EOL - endoflife.date

Tails 7.12 - torproject.org

Open Source Camera - petapixel.com

Vulcan Robotics - banyanhill.com

Automotive and Media Targeted - securityweek.com

Abu Dhabi AI - reuters.com

22:10 AI Fireside Chat

Securing the supply chain

Home Lab responsibilities

Transition to managed services

AI security tools

Passwords

Steve lets AI loose on his Home Assistant

AI mistakes

AI breakouts

Constraining AI

-- The Extra Credit Section --

For links to the articles and material referenced in this week's episode check out this week's page from our podcast dashboard!

This Episode's Podcast Dashboard

Phone Systems for Ask Noah provided by Voxtelesys

Join us in our dedicated chatroom #GeekLab:linuxdelta.com on Matrix

-- Stay In Touch --

Find all the resources for this show on the Ask Noah Dashboard

Ask Noah Dashboard

Need more help than a radio show can offer? Altispeed provides commercial IT services and they’re excited to offer you a great deal for listening to the Ask Noah Show. Call today and ask about the discount for listeners of the Ask Noah Show!

Altispeed Technologies

Contact Noah

live [at] asknoahshow.com

-- Twitter --

Noah - Kernellinux

Ask Noah Show

Altispeed Technologies