My PostgreSQL service on the shared cluster keeps reporting "No space left on device", causing n8n to intermittently report "Database is not ready".
Evidence:
- PostgreSQL logs show multiple errors at 2026-04-16 00:52:03 and 00:52:56: FATAL: could not write lock file "postmaster.pid": No space left on device
- It then recovered at 00:54:19 with: database system is ready to accept connections
- Checking inside the container shows the /var/lib/postgresql/data mount point reaching 100%.
- However, /var/lib/postgresql/data/pgdata is actually only 118M, and pg_wal is also very small.
This does not look like my database content is too large, but rather an issue with the underlying volume / NFS / storage quota of the shared cluster. Please help me check the actual available space and status of the volume backend. Service ID: service-6983ed149758a4530cd37c5f