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- GS_OBSSCANINFO
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- 系统视图
- ALL_ALL_TABLES
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- DBA_TABLES
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- DUAL
- GS_ALL_CONTROL_GROUP_INFO
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作业级别内存控制
链接复制成功！
更新时间：
2019/06/24 GMT+08:00
背景信息
DWS支持作业级别的内存控制。相比于单个算子的内存控制work_mem，更能有效利用内存资源，有效得控制内存资源的使用。
前提条件
集群安装完成且状态正常。
内存相关GUC参数
通过设置session级别的GUC参数query_mem，可以对作业可用内存进行控制。
操作步骤
数据库管理员可以通过下列步骤实现数据库逻辑内存管理。
- 设置query_mem为500MB
set query_mem='500MB'; SET
- 执行作业。
如果query_mem超过资源池可用内存的上限或者低于256MB时，query_mem将不起作用，作业依然使用work_mem
父主题：
内存管理
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