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2 min readNovember 13, 20250 views

How AI Agents Actually Work: Vector Databases, LLMs, and Production Systems

Technical deep dive into AI agent architecture: vector databases, embeddings, conversation persistence, LLMs, and production deployment.

How AI Agents Actually Work: Vector Databases, LLMs, and Production Systems

Introduction

Understanding how AI agents work under the hood helps you make informed decisions about implementation, performance, and scaling. This guide covers the technical architecture powering modern AI agents.

Core Components

1. Vector Databases

Vector databases store embeddings—numerical representations of text that capture semantic meaning. TKC uses Pinecone with 384-dimensional embeddings.

  • Query Time: ~0.05 seconds
  • Similarity Threshold: 82.4%
  • Use Case: Knowledge base retrieval, conversation memory

2. Conversation Persistence

Redis powers state management with LangGraph workflows for complex multi-turn conversations.

  • Memory: 1GB per conversation
  • Persistence: Cluster-ready, fault-tolerant
  • Use Case: Maintaining context across interactions

3. AI Models

Gemini 2.5 Flash models with ReAct patterns enable intelligent reasoning and decision-making.

  • Location: us-central1 (production-grade)
  • Pattern: ReAct (Reasoning + Acting)
  • Use Case: Natural language understanding, response generation

Production Architecture

AI agents run on Cloud Run with:

  • Auto-scaling based on demand
  • 99.9% uptime SLA
  • Global edge caching
  • Real-time monitoring and alerting

Performance Metrics

  • Response Time: 2-8 seconds average
  • Accuracy: 95%+ for common queries
  • Cost: $0.001-0.01 per interaction
  • Scalability: Handles 10,000+ concurrent conversations

Scaling Strategies

  • Horizontal scaling (add more instances)
  • Edge caching for common queries
  • Batch processing for non-real-time tasks
  • Load balancing across regions

Want to learn more about our technical architecture? Book a call with our technical team.

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