部署elasticsearch内核优化

1.优化脚本

if [ `grep 'soft memlock unlimited' /etc/security/limits.conf|wc -l ` -eq 0 ];then
   echo '* soft memlock unlimited' >> /etc/security/limits.conf
fi

if [ `grep 'hard memlock unlimited' /etc/security/limits.conf|wc -l ` -eq 0 ];then
    echo '* hard memlock unlimited' >> /etc/security/limits.conf
fi

if [ `grep 'vm.max_map_count'  /etc/sysctl.conf|wc -l` -eq 0 ];then
   echo 'vm.max_map_count=262144' >>/etc/sysctl.conf
fi

if [ `grep 'soft nofile 65536' /etc/security/limits.conf|wc -l` -eq 0 ];then
   echo "* soft nofile 65536" >> /etc/security/limits.conf
fi

if [ `grep 'hard nofile 65536' /etc/security/limits.conf|wc -l` -eq 0 ];then
   echo "* hard nofile 65536" >> /etc/security/limits.conf
fi

2.limits文件全部内容

[root@centos7 ~]# cat /etc/security/limits.conf
# /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    nofile  65535

*      hard    nofile  65535

*      soft    nproc   65535

*      hard    nproc   65535
* soft memlock unlimited
* hard memlock unlimited
* soft nofile 65536
* hard nofile 65536

3.sysctl文件全部内容

[root@centos7 ~]# cat /etc/sysctl.conf
# sysctl settings are defined through files in
# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.
#
# Vendors settings live in /usr/lib/sysctl.d/.
# To override a whole file, create a new file with the same in
# /etc/sysctl.d/ and put new settings there. To override
# only specific settings, add a file with a lexically later
# name in /etc/sysctl.d/ and put new settings there.
#
# For more information, see sysctl.conf(5) and sysctl.d(5).
vm.max_map_count=262144