Hermes may stall with more than 4 or 5 concurrent sessions
Hermes can run into trouble when it is used as one central place for several agents at the same time. Multiple agents appear to work until about 4 or 5 are running, then the system halts.
New sessions also cannot be opened reliably while other work is still running. The reported machine has an AMD 7900-class setup, 64GB memory, and a 3060 12GB , so the issue is not obviously caused by a very weak computer.
, Codex, Cursor, and Opencode do not show the same problem on that setup. The open question is whether Hermes has a limit, needs a change, or has a bug.
Key points
- Hermes may stall when more than 4 or 5 agents run at the same time.
- Opening new sessions during ongoing work may fail.
- The issue happened on a machine with 64GB memory and a 3060 12GB .
- Other tools on the same machine did not show the same behavior.
- A practical is to keep fewer sessions running until the cause is clearer.