Question

64G内存在linux/etc/sysctl.conf里怎样设置内核参数的相关推荐

Answer 1

完成对oracle-validated的安装后操作系统软件包环境也就水道渠成了，此外该oracle-validated包还会帮助我们设置必要的Linux内核参数，具体来说它会修改/etc/sysctl.conf配置文件中的参数到Oracle推荐的值，以下为完成oracle-validated安装后的sysctl.conf，供参考:
# Kernel sysctl configuration file for Oracle Enterprise Linux
#
# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
# sysctl.conf(5) for more details.

# Controls IP packet forwarding
net.ipv4.ip_forward = 0

# Controls source route verification
net.ipv4.conf.default.rp_filter = 1

# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0

# Controls the System Request debugging functionality of the kernel

# Controls whether core dumps will append the PID to the core filename
# Useful for debugging multi-threaded applications
kernel.core_uses_pid = 1

# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1

# Controls the maximum size of a message, in bytes

# Controls the default maxmimum size of a mesage queue

# Controls the maximum shared segment size, in bytes

# Controls the maximum number of shared memory segments, in pages

# For 11g, Oracle-Validated setting for fs.file-max is 6815744
# For 10g, uncomment 'fs.file-max = 327679', and comment 'fs.file-max = 6553600' entry and re-run sysctl -p
# fs.file-max = 327679
fs.file-max = 6815744

# Oracle-Validated setting for kernel.msgmni is 2878
kernel.msgmni = 2878

# Oracle-Validated setting for kernel.msgmax is 8192
kernel.msgmax = 8192

# Oracle-Validated setting for kernel.msgmnb is 65536
kernel.msgmnb = 65536

# Oracle-Validated setting for kernel.sem is '250 32000 100 142'
kernel.sem = 250 32000 100 142

# Oracle-Validated setting for kernel.shmmni is 4096
kernel.shmmni = 4096

# Oracle-Validated setting for kernel.shmall is 1073741824
kernel.shmall = 1073741824

# Oracle-Validated setting for kernel.shmmax is 4398046511104 on x86_64 and 4294967295 on i386 architecture. Refer Note id 567506.1
kernel.shmmax = 4398046511104

# Oracle-Validated setting for kernel.sysrq is 1
kernel.sysrq = 1

# Oracle-Validated setting for net.core.rmem_default is 262144
net.core.rmem_default = 262144

# For 11g, Oracle-Validated setting for net.core.rmem_max is 4194304
# For 10g, uncomment 'net.core.rmem_max = 2097152', comment 'net.core.rmem_max = 4194304' entry and re-run sysctl -p
# net.core.rmem_max = 2097152
net.core.rmem_max = 4194304

# Oracle-Validated setting for net.core.wmem_default is 262144
net.core.wmem_default = 262144

# For 11g, Oracle-Validated setting for net.core.wmem_max is 1048576
# For 10g, uncomment 'net.core.wmem_max = 262144', comment 'net.core.wmem_max = 1048576' entry for this parameter and re-run sysctl -p
# net.core.wmem_max = 262144
net.core.wmem_max = 1048576

# Oracle-Validated setting for fs.aio-max-nr is 3145728
fs.aio-max-nr = 3145728

# For 11g, Oracle-Validated setting for net.ipv4.ip_local_port_range is 9000 65500
# For 10g, uncomment 'net.ipv4.ip_local_port_range = 1024 65000', comment 'net.ipv4.ip_local_port_range = 9000 65500' entry and re-run sysctl -p
# net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.ip_local_port_range = 9000 65500

# Oracle-Validated setting for vm.min_free_kbytes is 51200 to avoid OOM killer
vm.min_free_kbytes = 51200