#include <db_cxx.h> int Db::set_q_extentsize(u_int32_t 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.
            
        
    
                         The Db::set_q_extentsize() 
            
            
                method may fail and throw a DbException 
                exception, encapsulating one of the following non-zero errors, or return one
                of the following non-zero errors:
            
        
                    
If the method was called after Db::open() was called; or if an invalid flag value or parameter was specified.