Parameter type

String

Syntax

COMMIT_WRITE = '{IMMEDIATE | BATCH},{WAIT |NOWAIT}'

Default value

If this parameter is not explicitly specified, then database commit behavior defaults to writing commit records to disk before control is returned to the client.

If only IMMEDIATE or BATCH is specified, but not WAIT or NOWAIT, then WAIT mode is assumed.

If only WAIT or NOWAIT is specified, but not IMMEDIATE or BATCH, then IMMEDIATE mode is assumed.

Be aware that the NOWAIT option can cause a failure that occurs after the database receives the commit message, but before the redo log records are written. This can falsely indicate to a transaction that its changes are persistent. Also, it can violate the durability of ACID (Atomicity, Consistency, Isolation, Durability) transactions if the database shuts down unexpectedly.

Modifiable

Yes (at both session-level and system-level). Values supplied for COMMIT_WRITE in an ALTER SYSTEM or ALTER SESSION statement must be separated by a comma.

Modifiable in a PDB

Yes

Range of values

Single-quoted, comma-separated list of either IMMEDIATE or BATCH, and either WAIT or NOWAIT.

Basic

No

Oracle RAC

Each instance may have its own setting