set the send and receie buffer size to larger of bdf*3 ora 10MB in both the tnsname.ora and listener.ora
inc
reate 
the sdu to 64k listener.ora。
disable tcp nagle algorithm in the sqlnet.ora.
tnsnames.ora
SDU
*_BUF_SIZE
listener.ora
SEND_BUF_SIZE
RECV_BUF_SIZE
You must optimize Oracle Net for Data Guard. Which parameters must be set in SQLNET.ORA and TNSNAMES.ORA to increase the network throughput to a rate that is higher than the default? (Choose two)
SEND_BUF_SIZE<=====
SEND_SDU
RECV_BUF_SIZE<=====
TCP.NODELAY=YES
RECV_SDU
You must optimize Oracle Net for Data Guard. Which parameters must be set in SQLNET.ORA and TNSNAMES.ORA to reduce the chopping up of data that occurs by default? (Choose two)
RECV_SDU <<<=======
TCP.NODELAY=YES
RECV_BUF_SIZE
SEND_BUF_SIZE
SEND_SDU <<<=======
SEND_SDU
Which are true about Oracle Net dynamic service registration for databases in a Data Guard environment? (Choose two)
Primary database services are registered with any remote listeners by the PMON background process.
Standby database services are registered with any remote listeners by the PMON background process.
Standby database services are registered with the local listener by the LREG background process.<===
Primary database services are registered with the local listener by the LREG background process.<====
Primary database services are registered with the local listener by the PMON background process.
Standby database services are registered with the local listener by the PMON background process.
