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Berkeley DB: DbEnv::set_verbose
DbEnv::set_verbose
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#include <db_cxx.h>
int
DbEnv::set_verbose(u_int32_t which, int 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
non-zero,
the additional messages are output.
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_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 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 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
The DbEnv::set_verbose method may fail and throw an exception or return a non-zero error for the following conditions:
- EINVAL
- An invalid flag value or parameter was specified.
The DbEnv::set_verbose method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods.
If a catastrophic error has occurred, the DbEnv::set_verbose method may fail and either
return DB_RUNRECOVERY or throw an exception encapsulating
DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail
in the same way.
Class
DbEnv
See Also
DbEnv::close,
DbEnv::err, DbEnv::errx
DbEnv::open,
DbEnv::remove,
DbEnv::set_alloc,
DbEnv::set_cachesize,
DbEnv::set_data_dir,
DbEnv::set_errcall,
DbEnv::set_errfile,
DbEnv::set_error_stream,
DbEnv::set_errpfx,
DbEnv::set_feedback,
DbEnv::set_flags,
DbEnv::set_mutexlocks,
DbEnv::set_pageyield,
DbEnv::set_paniccall,
DbEnv::set_panicstate,
DbEnv::set_recovery_init,
DbEnv::set_rpc_server,
DbEnv::set_region_init,
DbEnv::set_shm_key,
DbEnv::set_tas_spins,
DbEnv::set_tmp_dir,
DbEnv::set_verbose,
DbEnv::strerror
and
DbEnv::version.
Copyright Sleepycat Software
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