# Write, Change, Recall, Forget: MongoDB's Pete Johnson on How Retrieval Drives Agent Performance

Page: https://stenobird.com/podcast/the-cognitive-revolution/write-change-recall-forget-mongodb-s-pete-johnson-on-how-retrieval-drives-agent-performance
Text version: https://stenobird.com/podcast/the-cognitive-revolution/write-change-recall-forget-mongodb-s-pete-johnson-on-how-retrieval-drives-agent-performance.md
Podcast: ["The Cognitive Revolution"](https://stenobird.com/podcast/the-cognitive-revolution)
Published: 2026-09-01T09:26:39+00:00
Episode link: https://www.cognitiverevolution.ai/write-change-recall-forget-mongodb-s-pete-johnson-on-how-retrieval-drives-agent-performance/
Audio file: https://pdst.fm/e/mgln.ai/e/1113/pscrb.fm/rss/p/traffic.megaphone.fm/RINTP4227648811.mp3
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JSON: https://stenobird.com/v1/public/podcasts/the-cognitive-revolution/episodes/write-change-recall-forget-mongodb-s-pete-johnson-on-how-retrieval-drives-agent-performance
Duration seconds: 5803

## Resource

Nathan's guest this episode is Pete Johnson, Field CTO of AI at MongoDB, and the conversation is really two conversations woven together: a history of database architecture, and a status report on the still-unsolved problem of agent memory. Pete opens with a framing device that recurs throughout — he was born in February 1970, four months before E.F. Codd's original relational-model paper that gave rise to SQL. The relational model, he explains, was built for a world where storage was the scarce resource, so normalization — splitting data across linked tables to avoid duplication — was the rational design choice. For full show notes, links, and references, read the episode page:https://www.cognitiverevolution.ai/write-change-recall-forget-mongodb-s-pete-johnson-on-how-retrieval-drives-agent-performance/ Sponsors: Mercury: Mercury is the banking platform loved by 300,000+ entrepreneurs, with virtual cards and Spend controls for granular budgets, receipts, and low-risk AI agent purchases. Learn more and apply in minutes at https://mercury.com Granola: Granola is an AI-powered notepad that securely transcribes meetings and turns rough notes into clean, structured action items. Try it free at https://granola.ai/tcr Diffusion: Diffusion helps organizations build custom AI software factories that scale business outcomes, not just outputs. Cognitive Revolution listeners get a 25% service credit on their first engagement at https://diffusion.io/tcr Deepgram Flux TTS: Deepgram Flux TTS brings lifelike AI voices with real personalities that handle interruptions, pauses, and natural conversation. Try all the voices free through September 12 at https://deepgram.com/keep-talking Claude: Claude is the AI collaborator for problem solvers, helping with writing, coding, financial model…

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