#include <db_cxx.h>

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

int
DbEnv::get_verbose(u_int32_t which, int *onoffp);

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.

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

• 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.
  
  

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

• An invalid flag value or parameter was specified.

The DbEnv::get_verbose method returns whether the specified which parameter is currently set or not.

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

The DbEnv::get_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.

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

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