ORA-16166: LGWR timed out on Network Server 0 due to buffer full condition.
oracle : 9.2.0.6.0
os : x86_64 GNU/Linux
error :ORA-16166: LGWR timed out on Network Server 0 due to buffer full condition. in alert log
SGA :Total System Global Area 790071680 bytes
Fixed Size 743808 bytes
Variable Size 385875968 bytes
Database Buffers 402653184 bytes
Redo Buffers 798720 bytes
OPERATIONS : primary Dataguard is running
SQL> show parameter log_archive_dest_2
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
log_archive_dest_2 string service=DR_AXPPR01 LGWR ASYNC=
40960
Recovery is normal, when full export is running on this weekly once (aprox) it is happening .
Pl. advice what can be done to fix this.