调整文件描述符等

cat >> /etc/pam.d/login <<EOF
session    required     /lib64/security/pam_limits.so
session    required     pam_limits.so
EOF

scp /etc/security/limits.conf /etc/security/limits.conf.bak
true > /etc/security/limits.conf
cat >> /etc/security/limits.conf <<EOF
*   soft   nofile   65536
*   hard   nofile   65536
*   soft   nproc    16384
*   hard   nproc    16384
*   soft   stack    10240
*   hard   stack    32768
EOF

scp /etc/security/limits.d/20-nproc.conf /etc/security/limits.d/20-nproc.conf.bak
true > /etc/security/limits.d/20-nproc.conf
cat >> /etc/security/limits.d/20-nproc.conf<<EOF
*          soft    nproc    unlimited
*          hard    nproc    unlimited
EOF

echo 8061540 > /proc/sys/fs/file-max
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