DB_ENV->set_verbose

API Ref

#include <db.h>

int DB_ENV->set_verbose(DB_ENV *dbenv, u_int32_t which, int onoff);

int DB_ENV->get_verbose(DB_ENV *dbenv, u_int32_t which, int *onoffp);


Description: DB_ENV->set_verbose

The DB_ENV->set_verbose method turns specific additional informational and debugging messages in the Berkeley DB message output on and off. To see the additional messages, verbose messages must also be configured for the application. For more information on verbose messages, see the DB->set_errfile method.

The database environment's messages may also be set using the environment's DB_CONFIG file. The syntax of the entry in that file is a single line with the string "set_verbose", one or more whitespace characters, and the method which parameter as a string; for example, "set_verbose DB_VERB_CHKPOINT". Because the DB_CONFIG file is read when the database environment is opened, it will silently overrule configuration done before that time.

The DB_ENV->set_verbose method configures operations performed using the specified DB_ENV handle, not all operations performed on the underlying database environment.

The DB_ENV->set_verbose method may be called at any time during the life of the application.

The DB_ENV->set_verbose method returns a non-zero error value on failure and 0 on success.

Parameters

onoff
If the onoff parameter is set to non-zero, the additional messages are output.

which
The which parameter must be set to one of the following values:

DB_VERB_CHKPOINT
Display checkpoint location information when searching the log for checkpoints.

DB_VERB_DEADLOCK
Display additional information when doing deadlock detection.

DB_VERB_RECOVERY
Display additional information when performing recovery.

DB_VERB_REPLICATION
Display additional information when processing replication messages.

Note, to get complete replication logging when debugging replication applications, you must also configure and build the Berkeley DB library with the --enable-diagnostic configuration option as well as call the DB_ENV->set_verbose method.

DB_VERB_WAITSFOR
Display the waits-for table when doing deadlock detection.

Errors

The DB_ENV->set_verbose method may fail and return one of the following non-zero errors:

EINVAL
An invalid flag value or parameter was specified.

Description: dbenv_get_verbose

The DB_ENV->get_verbose method returns whether the specified which parameter is currently set or not.

The DB_ENV->get_verbose method may be called at any time during the life of the application.

The DB_ENV->get_verbose method returns a non-zero error value on failure and 0 on success.

Parameters

which
The which parameter is the message value for which configuration is being checked.

onoffp
The onoffp parameter references memory into which the configuration of the specified which parameter is copied.

Class

DB_ENV

See Also

Database Environments and Related Methods

APIRef

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