Db::set_q_extentsize API Ref

#include <db_cxx.h>

int Db::set_q_extentsize(u_int32_t extentsize);

int Db::get_q_extentsize(u_int32_t *extentsizep);


Description: Db::set_q_extentsize

Set the size of the extents used to hold pages in a Queue database, specified as a number of pages. Each extent is created as a separate physical file. If no extent size is set, the default behavior is to create only a single underlying database file.

For information on tuning the extent size, see Selecting a extent size.

The Db::set_q_extentsize method configures a database, not only operations performed using the specified Db handle.

The Db::set_q_extentsize method may not be called after the Db::open method is called. If the database already exists when Db::open is called, the information specified to Db::set_q_extentsize will be ignored.

The Db::set_q_extentsize 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
extentsize

Errors

The Db::set_q_extentsize method may fail and throw DbException, encapsulating one of the following non-zero errors, or return one of the following non-zero errors:


EINVAL

Description: Db::get_q_extentsize

The Db::get_q_extentsize method returns the number of pages in an extent.

The Db::get_q_extentsize method may be called at any time during the life of the application.

The Db::get_q_extentsize 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
extentsizep


Class Db
See Also Databases and Related Methods

APIRef

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