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  • 安装好的新服务器优化脚本

      1、内核参数优化:

    # Controls source route verification
    net.ipv4.conf.default.rp_filter = 1
    net.ipv4.ip_nonlocal_bind = 1
    net.ipv4.ip_forward = 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
    
    
    
    
    # TCP kernel paramater
    net.ipv4.tcp_mem = 786432 1048576 1572864
    net.ipv4.tcp_rmem = 4096        87380   4194304
    net.ipv4.tcp_wmem = 4096        16384   4194304
    net.ipv4.tcp_window_scaling = 1
    net.ipv4.tcp_sack = 1
    
    # socket buffer
    net.core.wmem_default = 8388608
    net.core.rmem_default = 8388608
    net.core.rmem_max = 16777216
    net.core.wmem_max = 16777216
    net.core.netdev_max_backlog = 262144
    net.core.somaxconn = 20480
    net.core.optmem_max = 81920
    
    
    # TCP conn
    net.ipv4.tcp_max_syn_backlog = 262144
    net.ipv4.tcp_syn_retries = 3
    net.ipv4.tcp_retries1 = 3
    net.ipv4.tcp_retries2 = 15
    
    # tcp conn reuse
    net.ipv4.tcp_tw_reuse = 1
    net.ipv4.tcp_tw_recycle = 1
    net.ipv4.tcp_fin_timeout = 1
    
    
    net.ipv4.tcp_max_tw_buckets = 20000
    net.ipv4.tcp_max_orphans = 3276800
    net.ipv4.tcp_timestamps = 1 #?
    net.ipv4.tcp_synack_retries = 1
    net.ipv4.tcp_syncookies = 1
    
    # keepalive conn
    net.ipv4.tcp_keepalive_time = 300
    net.ipv4.tcp_keepalive_intvl = 30
    net.ipv4.tcp_keepalive_probes = 3
    net.ipv4.ip_local_port_range = 10001    65000
    
    # swap
    vm.overcommit_memory = 0
    vm.swappiness = 10
    
    #net.ipv4.conf.eth1.rp_filter = 0
    #net.ipv4.conf.lo.arp_ignore = 1
    #net.ipv4.conf.lo.arp_announce = 2
    #net.ipv4.conf.all.arp_ignore = 1
    #net.ipv4.conf.all.arp_announce = 2

      2、设置最大打开文件描述符等等:

    # /etc/security/limits.conf
    #
    #This file sets the resource limits for the users logged in via PAM.
    #It does not affect resource limits of the system services.
    #
    #Also note that configuration files in /etc/security/limits.d directory,
    #which are read in alphabetical order, override the settings in this
    #file in case the domain is the same or more specific.
    #That means for example that setting a limit for wildcard domain here
    #can be overriden with a wildcard setting in a config file in the
    #subdirectory, but a user specific setting here can be overriden only
    #with a user specific setting in the subdirectory.
    #
    #Each line describes a limit for a user in the form:
    #
    #<domain>        <type>  <item>  <value>
    #
    #Where:
    #<domain> can be:
    #        - a user name
    #        - a group name, with @group syntax
    #        - the wildcard *, for default entry
    #        - the wildcard %, can be also used with %group syntax,
    #                 for maxlogin limit
    #
    #<type> can have the two values:
    #        - "soft" for enforcing the soft limits
    #        - "hard" for enforcing hard limits
    #
    #<item> can be one of the following:
    #        - core - limits the core file size (KB)
    #        - data - max data size (KB)
    #        - fsize - maximum filesize (KB)
    #        - memlock - max locked-in-memory address space (KB)
    #        - nofile - max number of open file descriptors
    #        - rss - max resident set size (KB)
    #        - stack - max stack size (KB)
    #        - cpu - max CPU time (MIN)
    #        - nproc - max number of processes
    #        - as - address space limit (KB)
    #        - maxlogins - max number of logins for this user
    #        - maxsyslogins - max number of logins on the system
    #        - priority - the priority to run user process with
    #        - locks - max number of file locks the user can hold
    #        - sigpending - max number of pending signals
    #        - msgqueue - max memory used by POSIX message queues (bytes)
    #        - nice - max nice priority allowed to raise to values: [-20, 19]
    #        - rtprio - max realtime priority
    #
    #<domain>      <type>  <item>         <value>
    #
    
    #*               soft    core            0
    #*               hard    rss             10000
    #@student        hard    nproc           20
    #@faculty        soft    nproc           20
    #@faculty        hard    nproc           50
    #ftp             hard    nproc           0
    #@student        -       maxlogins       4
    
    # End of file
    
    *                soft    core               unlimited
    *                hard    core             unlimited
    *                 soft    nproc            1000000
    *                 hard    nproc          1000000
    *                 soft    nofile            1000000
    *                hard    nofile          1000000
    *                soft    memlock      32000
    *                hard    memlock    32000
    *                soft    msgqueue    8192000
    *                hard    msgqueue  8192000

      3、关闭防火墙

      4、禁用selinux

      5、NetworkManager关闭(没有就不管,注意大小写)

    ------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------- 博客均为个人笔记,无所追求,仅供参考~~~ QQ--2382990774
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  • 原文地址:https://www.cnblogs.com/alexlv/p/15325276.html
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