安裝Oracle檢測linux核心引數
Checking kernel parameters
Checking for semmsl=250; found semmsl=250. Passed
Checking for semmns=32000; found semmns=32000. Passed
Checking for semopm=100; found semopm=32. Failed <<<<
Checking for semmni=128; found semmni=128. Passed
Checking for shmmax=536870912; found shmmax=68719476736. Passed
Checking for shmmni=4096; found shmmni=4096. Passed
Checking for shmall=2097152; found shmall=4294967296. Passed
Checking for file-max=65536; found file-max=88989. Passed
Checking for VERSION=2.6.9; found VERSION=2.6.18-92.el5xen. Passed
Checking for ip_local_port_range=1024 - 65000; found ip_local_port_range=32768 - 61000. Failed <<<<
Checking for rmem_default=262144; found rmem_default=126976. Failed <<<<
Checking for rmem_max=262144; found rmem_max=131071. Failed <<<<
Checking for wmem_default=262144; found wmem_default=126976. Failed <<<<
Checking for wmem_max=262144; found wmem_max=131071. Failed <<<<
Check complete. The overall result of this check is: Failed <<<<
Problem: The kernel parameters do not meet the minimum requirements (see above).
Recommendation: Perform operating system specific instructions to update the kernel parameters.
修改 /etc/sysctl.conf 核心配置檔案，增加/修改以下專案，如沒有自己新增
kernel.shmall = 2097152 # 可以使用的共享記憶體的總量。
kernel.shmmax = 2147483648 # 最大共享記憶體段大小。
kernel.shmmni = 4096 # 整個系統共享記憶體段的最大數目。
kernel.sem = 250 32000 100 128 # 每個訊號物件集的最大訊號物件數；系統範圍內最大訊號物件數；每個訊號物件支援的最大運算元；系統範圍內最大訊號物件集數。
fs.file-max = 65536 # 系統中所允許的檔案控制代碼最大數目。
net.ipv4.ip_local_port_range = 1024 65000 # 應用程式可使用的IPv4埠範圍。
net.core.rmem_default = 4194304 # 套接字接收緩衝區大小的預設值
net.core.rmem_max = 4194304 # 套接字接收緩衝區大小的最大值
net.core.wmem_default = 262144 # 套接字傳送緩衝區大小的預設值
net.core.wmem_max = 262144 # 套接字傳送緩衝區大小的最大值
執行下面的命令使得核心引數生效:
/sbin/sysctl –p