Virtual memoryedit Elasticsearch uses a hybrid mmapfs / niofs directory by default to store its indices. The default operating system limits on mmap counts is likely to be too low, which may result in out of memory exceptions. On Linux, you can incre…
报错信息如下 max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144] 临时解决办法(重启虚拟机会失效): 1.切换到root用户,执行命令: sysctl -w vm.max_map_count=262144 2.查看结果: sysctl -a|grep vm.max_map_count 3.显示: vm.max_map_count = 262144 永久解决办法 在/…
“This file contains the maximum number of memory map areas a process may have. Memory map areas are used as a side-effect of calling malloc, directly by mmap and mprotect, and also when loading shared libraries. While most applications need less than…
使用ES的基本都会使用过head,但是版本升级到5.0后,head插件就不好使了.下面就看看如何在5.0中启动Head插件吧! 官方粗略教程 Running with built in server enable cors by adding http.cors.enabled: true in elasticsearch configuration. Don't forget to also set http.cors.allow-origin because no origin allowe…
两种类型的Out of Memory java.lang.OutOfMemoryError: Java heap space error 当JVM尝试在堆中分配对象,堆中空间不足时抛出.一般通过设定JAVA启动参数-Xmx最小可用内存解决. java.lang.OutOfMemoryError: Unable to create new native thread 当JVM向OS申请创建线程,而OS不能分配一个本地线程时抛出. 了解系统参数 系统级最大进程ID $ sysctl -a | gre…
1.can not run elasticsearch as root 切换到非root用户 2.main ERROR Could not register mbeans java.security.AccessControlException: access denied ("javax.management.MBeanTrustPermission" "register") 改变elasticsearch文件夹所有者到当前用户 sudo chown -R nor…
最近需要测试一个长连接服务器,数据上需要达到100W的长连接,测试的客户端,一个线程保持一个连接,发现linux服务器默认创建到3200多个线程的时候,就会报错这个错误“java.lang.OutOfMemoryError: unable to create new native thread.而且,此时整个系统都不能创新新的线程了,不能连接终端,不能执行任何命令. 貌似是内存不足,但实际内存尚有富余,经验证,是linux的一些内核参数限制了创建新的线程. 因为要保持长连接,所有先修改客户端保证…
The C10K problem [Help save the best Linux news source on the web -- subscribe to Linux Weekly News! ] It's time for web servers to handle ten thousand clients simultaneously, don't you think? After all, the web is a big place now. And computers are …