Greenplum负载管理之Resource Group

Resource group use cgroup to control the cpu rate limitation include:
it can control the cpu upper thresholds a GPDB cluster can use
it can isolate cpu usage among various groups by percentage
When there are free cpu resources in one group, its cpu resources can be preempted by other groups;
resource group 使用cgroup来控制CPU的使用率:
控制一个集群使用CPU的阈值
隔离CPU的使用
当在一个group当中的CPU资源空闲时,这些CPU资源可以被其他group使用

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