ElasticSearch之虚拟内存

合集 - ElasticSearch(59)

1.ElasticSearch之安装2023-11-21 2.ElasticSearch之查看集群的参数2023-11-22 3.ElasticSearch之健康状态2023-11-22 4.ElasticSearch的日志配置2023-11-22 5.ElasticSearch之cat aliases API2023-11-23 6.ElasticSearch之Health API2023-11-23 7.ElasticSearch之Nodes info API2023-11-23 8.ElasticSearch之系统关键配置2023-11-23 9.ElasticSearch之cat allocation API2023-11-23 10.ElasticSearch之cat anomaly detectors API2023-11-23 11.ElasticSearch之cat component templates API2023-11-23 12.ElasticSearch之配置2023-11-23 13.ElasticSearch之cat count API2023-11-23 14.ElasticSearch之cat data frame analytics API2023-11-24 15.ElasticSearch之禁用交换分区2023-11-24

16.ElasticSearch之虚拟内存2023-11-24

查看当前Linux系统中vm.max_map_count变量的值，命令如下：

 sysctl vm.max_map_count

执行结果的样例，如下：

 vm.max_map_count = 65530

修改参数vm.max_map_count的值，命令如下

 sysctl -w vm.max_map_count=262144

执行结果的样例，如下：

 vm.max_map_count = 262144

为保证重启Linux系统后vm.max_map_count的取值依然生效，可以修改Linux系统配置文件/etc/sysctl.conf，追加如下内容：

 vm.max_map_count=262144

配置文件/etc/sysctl.conf的内容，样例如下：

 #
# /etc/sysctl.conf - Configuration file for setting system variables
# See /etc/sysctl.d/ for additional system variables.
# See sysctl.conf (5) for information.
#
#kernel.domainname = example.com
# Uncomment the following to stop low-level messages on console
#kernel.printk = 3 4 1 3
##############################################################3
# Functions previously found in netbase
#
# Uncomment the next two lines to enable Spoof protection (reverse-path filter)
# Turn on Source Address Verification in all interfaces to
# prevent some spoofing attacks
#net.ipv4.conf.default.rp_filter=1
#net.ipv4.conf.all.rp_filter=1
# Uncomment the next line to enable TCP/IP SYN cookies
# See http://lwn.net/Articles/277146/
# Note: This may impact IPv6 TCP sessions too
#net.ipv4.tcp_syncookies=1
# Uncomment the next line to enable packet forwarding for IPv4
#net.ipv4.ip_forward=1
# Uncomment the next line to enable packet forwarding for IPv6
#  Enabling this option disables Stateless Address Autoconfiguration
#  based on Router Advertisements for this host
#net.ipv6.conf.all.forwarding=1
 
###################################################################
# Additional settings - these settings can improve the network
# security of the host and prevent against some network attacks
# including spoofing attacks and man in the middle attacks through
# redirection. Some network environments, however, require that these
# settings are disabled so review and enable them as needed.
#
# Do not accept ICMP redirects (prevent MITM attacks)
#net.ipv4.conf.all.accept_redirects = 0
#net.ipv6.conf.all.accept_redirects = 0
# _or_
# Accept ICMP redirects only for gateways listed in our default
# gateway list (enabled by default)
# net.ipv4.conf.all.secure_redirects = 1
#
# Do not send ICMP redirects (we are not a router)
#net.ipv4.conf.all.send_redirects = 0
#
# Do not accept IP source route packets (we are not a router)
#net.ipv4.conf.all.accept_source_route = 0
#net.ipv6.conf.all.accept_source_route = 0
#
# Log Martian Packets
#net.ipv4.conf.all.log_martians = 1
#
###################################################################
# Magic system request Key
# 0=disable, 1=enable all, >1 bitmask of sysrq functions
# See https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html
# for what other values do
#kernel.sysrq=438
vm.swappiness=20
vm.max_map_count=262144

已知Elasticsearch进程的pid为19483，查看Elasticsearch进程当前占用的mmap的数量，命令样例如下：

 wc -l /proc/19483/maps

执行结果的样例，如下：

 414 /proc/19483/maps

相关资料

posted @ 2023-11-24 23:58 jackieathome 阅读(56) 评论(0) 编辑收藏举报

jackieathome

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	#
	# /etc/sysctl.conf - Configuration file for setting system variables
	# See /etc/sysctl.d/ for additional system variables.
	# See sysctl.conf (5) for information.
	#

	#kernel.domainname = example.com

	# Uncomment the following to stop low-level messages on console
	#kernel.printk = 3 4 1 3

	##############################################################3
	# Functions previously found in netbase
	#

	# Uncomment the next two lines to enable Spoof protection (reverse-path filter)
	# Turn on Source Address Verification in all interfaces to
	# prevent some spoofing attacks
	#net.ipv4.conf.default.rp_filter=1
	#net.ipv4.conf.all.rp_filter=1

	# Uncomment the next line to enable TCP/IP SYN cookies
	# See http://lwn.net/Articles/277146/
	# Note: This may impact IPv6 TCP sessions too
	#net.ipv4.tcp_syncookies=1

	# Uncomment the next line to enable packet forwarding for IPv4
	#net.ipv4.ip_forward=1

	# Uncomment the next line to enable packet forwarding for IPv6
	# Enabling this option disables Stateless Address Autoconfiguration
	# based on Router Advertisements for this host
	#net.ipv6.conf.all.forwarding=1


	###################################################################
	# Additional settings - these settings can improve the network
	# security of the host and prevent against some network attacks
	# including spoofing attacks and man in the middle attacks through
	# redirection. Some network environments, however, require that these
	# settings are disabled so review and enable them as needed.
	#
	# Do not accept ICMP redirects (prevent MITM attacks)
	#net.ipv4.conf.all.accept_redirects = 0
	#net.ipv6.conf.all.accept_redirects = 0
	# _or_
	# Accept ICMP redirects only for gateways listed in our default
	# gateway list (enabled by default)
	# net.ipv4.conf.all.secure_redirects = 1
	#
	# Do not send ICMP redirects (we are not a router)
	#net.ipv4.conf.all.send_redirects = 0
	#
	# Do not accept IP source route packets (we are not a router)
	#net.ipv4.conf.all.accept_source_route = 0
	#net.ipv6.conf.all.accept_source_route = 0
	#
	# Log Martian Packets
	#net.ipv4.conf.all.log_martians = 1
	#

	###################################################################
	# Magic system request Key
	# 0=disable, 1=enable all, >1 bitmask of sysrq functions
	# See https://www.kernel.org/doc/html/latest/admin-guide/sysrq.html
	# for what other values do
	#kernel.sysrq=438
	vm.swappiness=20
	vm.max_map_count=262144