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O'Reilly Platform
book
Presto实战
by
Matt Fuller
,
Manfred Moser
,
Martin Traverso
March 2021
Intermediate to advanced
265 pages
6h 50m
Chinese
Posts & Telecom Press
Content preview from
Presto实战
211
第
12
章
生产环境中的
Presto
在学习
Presto
的过程中,第
2
章介绍了探索性安装
Presto
的简单方法,第
5
章介绍了
Presto
的部署
,而这一章将更进一步地深入细节。毕竟,仅仅安装和配置集群与维持其长
时间运行非常不同,后者具有不同的用户、不断变化的数据源和完全独立的用法。
因此,这一章将进一步探索
Presto
集群操作者必备的其他方面的知识。
12.1
使用
Presto
Web
UI
监控
如
3.5
节所述,你可以在每个
Presto
集群的协调器上访问到其
Web
UI
,它可以用来检查和
监控
Presto
集群及其处理的查询。
W
ebUI
所提供的细节信息可用于帮你更好地理解和调优
Presto
的整体系统以及单个查询。
Presto
的
WebUI
暴露的信息来自
Presto
的系统表,在
8.2
节中有详细介绍。
当你第一次访问
PrestoWeb
UI
所在地址时,可以看到如图
12-1
所示的主仪表盘,其上方
显示
Presto
集群的信息,下方显示查询列表。
212
|
第
12
章
图
12-1
:
Presto Web UI
的主仪表盘
12.1.1
集群级的细节
下面先来讨论
Presto
集群的信息。
运行中的查询
Presto
集群中当前正在运行的查询总数
。所有用户的查询都会计入,例如,
Alice
运行
着
2
个查询且
Bob
运行着 ...
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Publisher Resources
ISBN: 9787115560056