init_db hard-coded max_connections(10). The execution gate
(ExecutionGate, PICLOUD_MAX_CONCURRENT_EXECUTIONS default 32) lets 32
script executions run concurrently, each doing multiple sequential
DB calls — plus the dispatcher tick every 100ms, the cron tick, three
GC sweeps, and the auth middleware running per request all draw from
the same pool. With max=10 vs gate=32, pool starvation surfaces as
acquire_timeout errors and tail-latency spikes under load.
- DEFAULT_DB_MAX_CONNECTIONS = 32 (matches gate default).
- Env knob: PICLOUD_DB_MAX_CONNECTIONS overrides; invalid/zero → default.
- Documented in CLAUDE.md runtime config table.
AUDIT.md anchor: F-P-003.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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