修改伺服器核心引數，修改如下：

##配置核心引數
vi /etc/sysctl.conf

fs.file-max = 6815744
kernel.sem = 250 32000 100 128
kernel.shmall = 1073741824
kernel.shmmax = 4398046511104
kernel.panic)on_oops = 1
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048576
net.ipv4.conf.all.rp_filter = 2
net.ipv4.conf.default.rp_filter = 2
fs.aio-max-nr = 1048576
net.ipv4.ip_local_port_range = 9000 65500
 

執行如下命令生效：

/sbin/sysctl -p

操作結束後，進行記憶體大小調整

SQL> show parameter sga;
SQL> alter system set sga_max_size = 50G scope=spfile;
SQL> alter system set sga_target = 50G scope=spfile;
SQL> shutdown immediate
SQL> startup mount
SQL> show parameter sga;