#include <db_cxx.h> int DbEnv::set_mp_max_write(int maxwrite, db_timeout_t maxwrite_sleep);
         The DbEnv::set_mp_max_write() method limits the number of sequential
         write operations scheduled by the library when flushing dirty pages
         from the cache.
    
The database environment's maximum number of sequential write operations may also be configured using the environment's DB_CONFIG file. The syntax of the entry in that file is a single line with the string "set_mp_max_write", one or more whitespace characters, and the maximum number of sequential writes and the number of microseconds to sleep, also separated by whitespace characters. 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_mp_max_write() method configures a database
         environment, not only operations performed using the specified 
         DbEnv  handle.
    
         The DbEnv::set_mp_max_write() 
            
            
                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 maximum number of sequential write operations scheduled by the library when flushing dirty pages from the cache, or 0 if there is no limitation on the number of sequential write operations.
                         The DbEnv::set_mp_max_write() 
            
            
                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: