DB_ENV->set_verbose()

#include <db.h>

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

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_ENV->set_msgfile() method.

The database environment's messages may also be configured 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 and optionally one or more whitespace characters, and the string "on" or "off". If the optional string is omitted, the default is "on"; for example, "set_verbose DB_VERB_RECOVERY" or "set_verbose DB_VERB_RECOVERY on". 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

which

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

DB_VERB_DEADLOCK

Display additional information when doing deadlock detection.
DB_VERB_FILEOPS

Display additional information when performing filesystem operations such as open, close or rename. May not be available on all platforms.
DB_VERB_FILEOPS_ALL

Display additional information when performing all filesystem operations, including read and write. May not be available on all platforms.
DB_VERB_RECOVERY

Display additional information when performing recovery.
DB_VERB_REGISTER

Display additional information concerning support for the DB_REGISTER flag to the DB_ENV->open() method.
DB_VERB_REPLICATION

Display all detailed information about replication. This includes the information displayed by all of the other DB_VERB_REP_* and DB_VERB_REPMGR_* values.
DB_VERB_REP_ELECT

Display detailed information about replication elections.
DB_VERB_REP_LEASE

Display detailed information about replication master leases.
DB_VERB_REP_MISC

Display detailed information about general replication processing not covered by the other DB_VERB_REP_* values.
DB_VERB_REP_MSGS

Display detailed information about replication message processing.
DB_VERB_REP_SYNC

Display detailed information about replication client synchronization.
DB_VERB_REP_SYSTEM

Saves replication system information to a system-owned file. This value is on by default.
DB_VERB_REPMGR_CONNFAIL

Display detailed information about Replication Manager connection failures.
DB_VERB_REPMGR_MISC

Display detailed information about general Replication Manager processing.
DB_VERB_WAITSFOR

Display the waits-for table when doing deadlock detection.

onoff

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

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.

Class

DB_ENV