DbEnv::set_verbose()

#include <db_cxx.h>

int
DbEnv::set_verbose(u_int32_t which, int onoff); 

The DbEnv::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 DbEnv::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; for example, "set_verbose DB_VERB_RECOVERY". Because the DB_CONFIG file is read when the database environment is opened, it will silently overrule configuration done before that time.

The DbEnv::set_verbose() method configures operations performed using the specified DbEnv handle, not all operations performed on the underlying database environment.

The DbEnv::set_verbose() method may be called at any time during the life of the application.

The DbEnv::set_verbose() method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, and returns 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_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 DbEnv::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_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.

Errors

The DbEnv::set_verbose() method may fail and throw a DbException exception, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:

EINVAL

An invalid flag value or parameter was specified.

Class

DbEnv

See Also

Database Environments and Related Methods