DB_ENV->set_lg_bsize
DB_ENV->set_lg_bsize |
|
#include <db.h>int DB_ENV->set_lg_bsize(DB_ENV *dbenv, u_int32_t lg_bsize);
Set the size of the in-memory log buffer, in bytes. By default, or if the value is set to 0, a size of 32K is used. The size of the log file (see DB_ENV->set_lg_max) must be at least four times the size of the the in-memory log buffer.
Log information is stored in-memory until the storage space fills up or transaction commit forces the information to be flushed to stable storage. In the presence of long-running transactions or transactions producing large amounts of data, larger buffer sizes can increase throughput.
The DB_ENV->set_lg_bsize interface may be used only to configure Berkeley DB before the DB_ENV->open interface is called.
The DB_ENV->set_lg_bsize function returns a non-zero error value on failure and 0 on success.
The database environment's log buffer 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_bsize", 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 DB_ENV->set_lg_bsize function may fail and return a non-zero error for the following conditions:
Called after DB_ENV->open was called.
The size of the log file is less than four times the size of the in-memory log buffer.
The DB_ENV->set_lg_bsize 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_lg_bsize function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.
|
|
Copyright Sleepycat Software @ 1.1 log @Initial revision @ text @d1 1 a1 1 @ 1.1.1.1 log @Import: RPM 4.0.3 @ text @@ 1.1.1.2 log @Import: RPM 4.0.4 @ text @d1 1 a1 1 d63 1 a63 1 DB_ENV->log_archive, d65 6 a70 8 DB_ENV->log_cursor, DB_ENV->log_file, DB_ENV->log_flush, DB_ENV->log_put, DB_ENV->log_register, DB_ENV->log_stat, DB_ENV->log_unregister, DB_LOGC->close d72 1 a72 1 DB_LOGC->get. @ 1.1.1.3 log @Import: RPM 4.0.5 @ text @d1 2 a2 2 a3 1 d37 3 a39 8
The DB_ENV->set_lg_bsize method configures a database environment, not only operations performed using the specified DB_ENV handle.
The DB_ENV->set_lg_bsize interface may not be called after the DB_ENV->open interface is called. If the database environment already exists when DB_ENV->open is called, the information specified to DB_ENV->set_lg_bsize will be ignored.
The DB_ENV->set_lg_bsize method returns a non-zero error value on failure and 0 on success. d47 1 a47 1
The DB_ENV->set_lg_bsize method may fail and return a non-zero error for the following conditions: d54 4 a57 6
The DB_ENV->set_lg_bsize method 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_lg_bsize method may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.
The DB_ENV->set_lg_bsize interface may be used only to configure Berkeley DB before the DB_ENV->open interface is called.
The DB_ENV->set_lg_bsize function returns a non-zero error value on failure and 0 on success. d53 1 a53 1
The DB_ENV->set_lg_bsize function may fail and return a non-zero error for the following conditions: d60 6 a65 4
The DB_ENV->set_lg_bsize 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_lg_bsize function may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way. d67 1 a67 16 DB_ENV->set_lg_bsize, DB_ENV->set_lg_dir, DB_ENV->set_lg_max, DB_ENV->set_lg_regionmax, DB_ENV->log_archive, log_compare, DB_ENV->log_cursor, DB_ENV->log_file, DB_ENV->log_flush, DB_ENV->log_put, DB_ENV->log_register, DB_ENV->log_stat, DB_ENV->log_unregister, DB_LOGC->close and DB_LOGC->get. @ 1.1.1.5 log @Import: RPM 4.1.1 @ text @d1 2 a2 2 a3 1 d37 3 a39 8
The DB_ENV->set_lg_bsize method configures a database environment, not only operations performed using the specified DB_ENV handle.
The DB_ENV->set_lg_bsize interface may not be called after the DB_ENV->open interface is called. If the database environment already exists when DB_ENV->open is called, the information specified to DB_ENV->set_lg_bsize will be ignored.
The DB_ENV->set_lg_bsize method returns a non-zero error value on failure and 0 on success. d47 1 a47 1
The DB_ENV->set_lg_bsize method may fail and return a non-zero error for the following conditions: d54 4 a57 6
The DB_ENV->set_lg_bsize method 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_lg_bsize method may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.