Gateway settings

Per instance, the Setup UI offers Max concurrent connections; set it to 1 for ERP drivers that permit only one session, because the Gateway syncs several tables in parallel and opens one connection per table. The Advanced (ODBC) grid holds per-table hints.

In config.json under Runtime: UploadsInFlight (how many batches may be in flight at once, default 3, 1 to 4), CommandTimeoutSeconds (a timeout for source queries, default 0 for none) and LogRetentionDays (default 45).