The documentation has error of ommission; as shown below - Using any text editor, create or edit the /etc/sysctl.conf file, and add or edit lines similar to the following: kernel.shmall = 2097152 kernel.shmmax = 2147483648 kernel.shmmni = 4096 kernel.sem = 250 32000 100 128 fs.file-max = 65536 net.ipv4.ip_local_port_range = 1024 65000 rmem_default = 262144 rmem_max = 262144 wmem_default = 262144 wmem_max = 262144 =============================================== The lines below are what is REALLY required. net.core.rmem_default = 262144 net.core.rmem_max = 262144 net.core.wmem_default = 262144 net.core.wmem_max = 262144 -- //www.freelists.org/webpage/oracle-l