* Introduced ApplicationName field to identify clients in DSN
* Set default ApplicationName to "ResolveSpec"
* Updated tests for ApplicationName handling in DSN
Add MaxOpenConnections to provider and connection stats, exposed as the
max state of dbmanager_connection_pool_size. Count physical dials through a
counting driver connector and export dbmanager_connections_opened_total;
existing_db pools derive an approximate count from sql.DBStats.
Implements the fixes from audit/pkg/dbmanager.audit.md.
- Stop closing the shared *sql.DB to recover from errors. Adapter
factories and the health checker no longer call Reconnect; Reconnect is
atomic and operator-only.
- Postgres uses a custom driver.Connector: Reconnect retires pooled
connections by generation without closing the pool, so held Bun/GORM
handles keep working. Verified against a live server restart.
- Add TCP keepalive, TCP_USER_TIMEOUT, a bounded reuse ping and
statement_timeout as a runtime parameter; drop the 2 min timeout floor.
- Health check pings without holding the connection lock.
- Listener: single goroutine pair, bounded Close without UNLISTEN, and
serialised use of the pgx connection (fixes conn busy and a close race).
- Fix Connect/Close/Connect/Close panic, idempotent Connect, dial outside
the manager lock, clean up on partial failure.
- SQLite: pin :memory: to one connection, pragmas via DSN.
- Escape credentials in Postgres/MSSQL/Mongo DSNs; sslmode defaults to
prefer. Wire retry settings, publish metrics, fix logger calls.
- NewConnectionFromDB: Close is a no-op with a warning (caller owns the
pool); Reconnect only pings.
- Document correct usage in the README; mark the audit with what was done.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Hein
