Viewing file:  env_set_lg_regionmax.html (4.72 KB) -rw-r--r--
Select action/file-type:
 (+) | (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
Berkeley DB: DbEnv::set_lg_regionmax
DbEnv::set_lg_regionmax
|
 |
#include <db_cxx.h>
int
DbEnv::set_lg_regionmax(u_int32_t lg_regionmax);
int
DbEnv::get_lg_regionmax(u_int32_t *lg_regionmaxp);
Description: DbEnv::set_lg_regionmax
Set the size of the underlying logging area of the Berkeley DB environment,
in bytes. By default, or if the value is set to 0, the default size is
60KB. The log region is used to store filenames, and so may need to be
increased in size if a large number of files will be opened and
registered with the specified Berkeley DB environment's log manager.
The database environment's log region size 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_lg_regionmax", one or more whitespace characters,
and the size in bytes.
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_lg_regionmax method configures a database environment, not only operations
performed using the specified DbEnv handle.
The DbEnv::set_lg_regionmax method may not be called after the DbEnv::open method is
called.
If the database environment already exists when
DbEnv::open is called, the information specified to DbEnv::set_lg_regionmax
will be ignored.
The DbEnv::set_lg_regionmax 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
- lg_regionmax
- The lg_regionmax parameter is the size of the logging area in
the Berkeley DB environment, in bytes.
Errors
The DbEnv::set_lg_regionmax method
may fail and throw
DbException,
encapsulating one of the following non-zero errors, or return one of
the following non-zero errors:
- EINVAL
- If the method was called after DbEnv::open was called; or if an
invalid flag value or parameter was specified.
Description: DbEnv::get_lg_regionmax
The DbEnv::get_lg_regionmax method returns the size of the underlying logging subsystem region.
The DbEnv::get_lg_regionmax method may be called at any time during the life of the
application.
The DbEnv::get_lg_regionmax 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
- lg_regionmaxp
- The DbEnv::get_lg_regionmax method returns the
size of the underlying logging subsystem region in lg_regionmaxp.
Class
DbEnv, DbLogc, DbLsn
See Also
Logging Subsystem and Related Methods
Copyright (c) 1996-2004 Sleepycat Software, Inc. - All rights reserved.
|