38 lines
2.5 KiB
Markdown
38 lines
2.5 KiB
Markdown
---
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created: '2026-05-18'
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path: Sources/Homelab
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project: herbys-dev-setup
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tags:
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- claude-code
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- dispatch
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- automation
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type: session-notes
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---
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## Outcome
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Identified that Claude Desktop on `us-test-authy` accumulates Dispatch subprocess zombies that consume substantial RAM (~10.6GB across 41 processes observed during this session). Closed Desktop to recover ~7GB immediately. Parked the long-term fix as a follow-on — daily nightly stop via user systemd timer is the leading approach.
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## Topics Covered
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- Diagnosed RAM pressure on `us-test-authy` (13/23GB used, hunting for the cause)
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- Found 41 `claude` subprocesses totaling 10.6GB, all parented to the live Claude Desktop electron process (PID 183216) — not orphaned, just never reaped
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- Subprocesses ranged from ~6h to 8 days old; oldest were Dispatch sessions long abandoned
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- Confirmed the pattern: Desktop spawns `claude --output-format stream-json` subprocesses per Dispatch session, doesn't SIGTERM them on session end, they sit idle attached to the parent
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- Closing Claude Desktop killed the parent and all children together — clean recovery
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- Discussed reaper-cron vs. parent-restart approaches; parent-restart wins on simplicity
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## Key Learnings
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- The subprocess leak is structural, not a cron-able janitor problem. The parent is alive and "owns" the children; they don't get cleaned up until the parent dies.
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- This is the same failure mode the dispatch-replacement work is designed to eliminate (harness owns subprocess lifecycle explicitly). Tonight produced concrete evidence for why that work matters.
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- User systemd timer is the right mechanism, not root cron — Claude Desktop is a GUI Electron app tied to the user session and DBus.
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- "Just stop, don't restart" is cleaner — at 4am there's no graphical session to relaunch into, just stop and let user relaunch on next sign-in.
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## Follow-ons
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- [ ] Decide whether to implement the user systemd timer (stop-only at 04:00) or rely on manual daily quit-and-relaunch
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- [ ] If implementing the timer: confirm hour doesn't conflict with any Lovebug overnight work, then write `~/.config/systemd/user/claude-desktop-nightly-stop.{service,timer}`
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- [ ] Verify Manjaro tower exhibits the same leak pattern; if so, deploy same fix via Ansible
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- [ ] File observation as input to dispatch-replacement design — subprocess lifecycle ownership is a hard requirement, validated by this incident
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- [ ] Optional safety-net: memory-pressure alert cron (notify if `free -h` available drops below 4GB) |