CentOS设置用户句柄数与用户进程数

CentOS设置用户句柄数与用户进程数

1、用户句柄数

vi /etc/security/limits.conf在文件末尾增加

# My add
*           soft  core   unlimit
*           hard  core   unlimit
*           soft  fsize  unlimited
*           hard  fsize  unlimited
*           soft  data   unlimited
*           hard  data   unlimited
*           soft  nproc  65535
*           hard  nproc  63535
*           soft  stack  unlimited
*           hard  stack  unlimited
*           soft  nofile  409600
*           hard  nofile  409600

2、用户进程数

vim /etc/security/limits.d/90-nproc.conf

把1024修改成4096，默认情况下普通用户是1024，root没有限制

*          soft    nproc     4096
root       soft    nproc     unlimited

3、通常/etc/sysctl.conf 不需要修改，配置内存在使用到95%时启用swap具体如下：

# Kernel sysctl configuration file for Red Hat 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
kernel.sysrq = 0

# 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

# Disable netfilter on bridges.
net.bridge.bridge-nf-call-ip6tables = 0
net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 0

# Controls the default maxmimum size of a mesage queue
kernel.msgmnb = 65536

# Controls the maximum size of a message, in bytes
kernel.msgmax = 65536

# Controls the maximum shared segment size, in bytes
kernel.shmmax = 68719476736

# Controls the maximum number of shared memory segments, in pages
kernel.shmall = 4294967296

vm.swappiness=5

文件生效执行命令：

sysctl -p

参考文章：

设置内存使用率而启用swap的参数