su: /bin/bash: Too many open files in system

[root@pansa ~]# su - oracle
su: /bin/bash: Too many open files in system
--这里报错，说打开的文件太多，不能切换到oracle用户了

--解决方法(增加最大打开文件数的限制，当然最好是自己能控制好这个数量，要不机器性能也不行)
[root@pansa ~]# cat /proc/sys/fs/file-max
65536
[root@pansa ~]# vi /etc/sysctl.conf
修改fs.file-max = 6553600
[root@pansa ~]# sysctl -p
kernel.sysrq = 0
kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
kernel.msgmnb = 65536
kernel.msgmax = 65536
kernel.shmmax = 68719476736
kernel.shmall = 4294967296
kernel.sem = 1055 32000 100 128
kernel.shmmax = 2147483648
kernel.shmall = 2097152
net.core.optmem_max = 65535
net.core.rmem_default = 4194304
net.core.wmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_max = 262144
fs.file-max = 6553600

[root@pansa ~]# cat /proc/sys/fs/file-max
6553600

--然后就可以切换了

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转载于:http://blog.itpub.net/26463985/viewspace-717500/