Local Multi-Agent Bottlenecks: Devs Share Concurrency Limits for Coding Agents
joymux · reddit · 2026-08-09
A developer sparked a discussion on Reddit about performance bottlenecks when running local Cursor/Codex-style coding agents. Initially, running just 2 concurrent agents caused severe system thrashing and crashes. After changing how sessions are hosted, they managed to maintain about 6 agent threads across different repos without crash loops.
They asked the community for real-world operator numbers: 1) What is the practical concurrency ceiling before the machine becomes unusable? 2) Do you isolate agents in containers/VMs or run them on the host? 3) When things blow up, is the bottleneck RAM, CPU, or the IDE spawning duplicate agent sessions?
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