Berkeley DB

DBENV→set_tx_max

						#include <db.h>
						int
						DBENV→set_tx_max(DB_ENV *dbenv, u_int32_t tx_max);
					

Description

Set the maximum number of active transactions that are supported by the environment. This value bounds the size of backing shared memory regions. Note that child transactions must be counted as active until their ultimate parent commits or aborts.

When there are more than the specified number of concurrent transactions, calls to txn_begin will fail (until some active transactions complete). If no value is specified, a default value of 20 is used.

The DBENV→set_tx_max interface may only be used to configure Berkeley DB before the DBENV→open interface is called.

The DBENV→set_tx_max function returns a non-zero error value on failure and 0 on ...