elasticsearch 内存大小设置
找到elasticsearch的安装目录，然后找到config文件夹，里面都是相关的配置文件。
官方不建议直接修改jvm.options，而是复制jvm.options到jvm.options.d目录下，再修改。
其中，jvm.options可以修改es运行时候的内存分配。打开jvm.options文件，我们可以发现默认设置的内存是4g。
################################################################
## IMPORTANT: JVM heap size
################################################################
##
## The heap size is automatically configured by Elasticsearch
## based on the available memory in your system and the roles
## each node is configured to fulfill. If specifying heap is
## required, it should be done through a file in jvm.options.d,
## which should be named with .options suffix, and the min and
## max should be set to the same value. For example, to set the
## heap to 4 GB, create a new file in the jvm.options.d
## directory containing these lines:
##
## -Xms4g
## -Xmx4g
##
## See https://www.elastic.co/guide/en/elasticsearch/reference/8.6/heap-size.html
## for more information
##
###############################################################
将内存修改为你想要的实际大小，保存，重新启动es即可。