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Berkeley DB: DB_ENV->set_verbose
DB_ENV->set_verbose
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#include <db.h>
int
DB_ENV->set_verbose(DB_ENV *dbenv, u_int32_t which, int onoff);
Description
The DB_ENV->set_verbose function 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 DB_ENV->set_verbose interface may be used to configure Berkeley DB at any time
during the life of the application.
The DB_ENV->set_verbose function returns a non-zero error value on failure and 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 DB_ENV->set_verbose function may fail and return a non-zero error for the following conditions:
- EINVAL
- An invalid flag value or parameter was specified.
The DB_ENV->set_verbose function may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions.
If a catastrophic error has occurred, the DB_ENV->set_verbose function may fail and return
DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail
in the same way.
See Also
db_env_create,
DB_ENV->close,
DB_ENV->err, DB_ENV->errx
DB_ENV->open,
DB_ENV->remove,
DB_ENV->set_alloc,
DB_ENV->set_cachesize,
DB_ENV->set_data_dir,
DB_ENV->set_errcall,
DB_ENV->set_errfile,
DB_ENV->set_errpfx,
DB_ENV->set_feedback,
DB_ENV->set_flags,
DB_ENV->set_mutexlocks,
db_env_set_pageyield,
DB_ENV->set_paniccall,
db_env_set_panicstate,
DB_ENV->set_recovery_init,
DB_ENV->set_rpc_server,
db_env_set_region_init,
DB_ENV->set_shm_key,
db_env_set_tas_spins,
DB_ENV->set_tmp_dir,
DB_ENV->set_verbose,
db_strerror
and
db_version.
Copyright Sleepycat Software
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