# DbEnv.set_verbose

`

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    import com.sleepycat.db.*;

    public int set_verbose(u_int32_t which, boolean onoff);

# Description

The DbEnv.set_verbose method turns additional informational and debugging messages in the Berkeley DB message output on and off. If onoff is set to true, the additional messages are output.

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

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

Db.DB_VERB_DEADLOCK
  Display additional information when doing deadlock detection.

Db.DB_VERB_RECOVERY
  Display additional information when performing recovery.

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

The DbEnv.set_verbose interface may be used to configure Berkeley DB at any time during the life of the application.

The DbEnv.set_verbose method throws an exception that encapsulates a non-zero error value on failure.

The database environment's verbosity 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 interface which argument 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.

# Errors

EINVAL
  An invalid flag value or parameter was specified.

### Class

DbEnv

# See Also

DbEnv.close, DbEnv.open, DbEnv.remove, DbEnv.strerror, DbEnv.get_version_string DbEnv.set_cachesize, DbEnv.set_errcall, DbEnv.set_error_stream, DbEnv.set_errpfx, DbEnv.set_flags, DbEnv.set_mutexlocks, and DbEnv.set_verbose.`

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