不爲也 比不能也

centos에서 redis를 설치하고, 실행을 하면, log 파일에서 다음과 같은 WARNING이 나타나는 경우가 있다. 이를 제거해 보자. # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128. # WARNING overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run t..

Elastic Cloud is on the tail end of eliminating a mix of memory issues that has caused problems for a lot of low-memory nodes, and in some rare cases even large nodes. Following the memory problems, we experienced connectivity issues on a handful of servers in eu-west-1 that affected any cluster with at least one node on these impacted servers.Elastic Cloud는 많은 memory가 작은 node와 일부 드문 경우에 큰 node에..

Our final topic in this chapter is about an internal aspect of Elasticsearch. While we don’t demonstrate any new techniques here, doc values are an important topic that we will refer to repeatedly, and is something that you should be aware of.이 장의 마지막 주제는 Elasticsearch의 내부에 대한 것이다. 여기에서는 새로운 기술을 보여주지는 않지만, doc values는 반복적으로 언급할 중요한 주제이며, 알아야 한다.When you sort on a field, Elasticsearch needs acces..

If you’ve been following the normal development path, you’ve probably been playing with Elasticsearch on your laptop or on a small cluster of machines lying around. But when it comes time to deploy Elasticsearch to production, there are a few recommendations that you should consider. Nothing is a hard-and-fast rule; Elasticsearch is used for a wide range of tasks and on a bewildering array of ma..