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Asyncpg Updates & Release Notes

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Asyncpg von MagicStack

Asyncpg 0.32.0: Python 3.15, PostgreSQL 19 und neuer Pool-Parameter

Asyncpg 0.32.0 unterstützt Python 3.15 und PostgreSQL 19, macht pool min_size zu einer dauerhaft gehaltenen Mindestanzahl an Verbindungen (neuer Parameter init_size steuert die Startverbindungen), beschleunigt die SCRAM-Passwortableitung und behebt u. a. einen Pool-Deadlock nach Protokollabbruch sowie die Beachtung von Connection.close(timeout=...).

Improvements

  • Support Python 3.15 (#1367, #1378) (by @elprans in 1b118464 and 58c0c595)

  • Support PostgreSQL 19 (#1379) (by @elprans in 8d2a5aed)

  • Make pool min_size a maintained connection floor and add init_size to control the number of connections opened at startup (#1323). Idle connections at or below min_size are retained, and closed connections are replaced in the background. init_size defaults to min_size. To preserve the previous behavior, where the pool could drain to zero, replace min_size=N with init_size=N, min_size=0. (by @shatilov-diman in 67a1cbc5)

  • Use hashlib.pbkdf2_hmac() for faster SCRAM password derivation (#1359) (by @twelfthlabor in 00319a9b)

  • Use the statement cache for copy_records_to_table() introspection (#1360) (by @matemax in dd058652)

Fixes

  • Clean up connections rejected by target_session_attrs immediately so an unresponsive rejected host cannot delay the selected connection, and cleanup tasks cannot outlive the event loop. Rejected connections are aborted without waiting for a graceful disconnect; servers may log "unexpected EOF on client connection" if the Terminate message is not delivered before the transport closes.

  • Fix a connection pool deadlock when releasing a connection after a protocol abort (#1324) (by @pchaseh in 4a83cc2f)

  • Honor Connection.close(timeout=...) while waiting for a pending cancellation (#1361) (by @gyanu2507 in c06bcb4d) …

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