Customers Need to Create a New Oracle Database Server Huawei

Customers need to create a new Oracle database server Huawei RH5885. V2 32 nuclear CPU, the host using Redhat6.4 operating system, the text system is EXT4, the storage device Oceanstor V3, the I SAS disk and 8D + 1P RAID5 are configured to guide one million data batch. Which of the following methods can improve the import performance into the new database? (Multiple choice.)

A) Modify the value of DB-WRITER-PROCESSES.
B) Redhat system default CFQ algorithm on the database business efficiency is not high, should be adjusted to noop algorithm.
C) Oracle database FILESYSTEMIO-OPTIONS parameter can be set to Asynch, and the file system log off.
D) Modify Oracle's DB-BLOCK-SIZE parameters.