## Brin Index在 Greenplum 7中的理论与实现 --《Greenplum 7 新版本大剧透》系列直播 讲师：陈金豹，Greenplum内核研发 活动时间：2021年4月28日 20:00 - 21:00 #### .greenplum.org ## Brin Index 在Greenplum 7中的理论与实践 陈金豹, VMWare内核工程师 ## 目录 Brin Index On Heap AppendOnly Table Brin在AppendOnly Table上的实现 性能测试 ## Block Range Index 存储数据块中元组字段的最大最小值，用于过滤不符合条件的数据块 Brin Selection: 1-((B-1)/B)^(N*a) = 1-0.000045 ## ◀ ◀ ◀ ◀ ## Brin的使用场景 表非常大 数据有一定的分布特性 我们不想再index上付出太多存储空间 ## Brin Scan select * from t where a > 1 and a < 8; |1, 3, 2, 5|7, 8, 8, 10|9, 11

869 9.7.2 TiFlash_schema_apply_duration ··· 869 9.7.3 TiFlash_raft_read_index_duration ··· 870 9.7.4 TiFlash_raft_wait_index_duration ··· 870 9.8 自定义监控组件的配置 ··· 870 9.8.1 自定义 Prometheus 配置 ··· 871 Continuous Profiling ··· 4586 17.4 D ··· 4587 17.4.1 Dynamic Pruning ··· 4587 17.5 I ··· 4587 17.5.1 Index Merge ··· 4587 17.5.2 In-Memory Pessimistic Lock ··· 4587 17.6 L ··· 4587 17.6.1 Leader/Follower/Learner Notes PDF查看两个LTS版本之间的所有release notes。下表列出了从7.2.0到7.5.0的一些关键特性： 分类 功能 描述 可扩展性与性能 支持并行运行多个 ADD INDEX 语句 通过该功能，为同一个表添加多个索引的任务可以变为并发运行。以前同时运行2个添加索引语句X和 $ \hookrightarrow $ Y需要花费X的时间+Y的时间，现在

Indexes 52 4.9.1 GiST Indexes 53 4.9.2 BRIN Indexes 53 4.9.3 SP-GiST Indexes 55 4.9.4 Tuning Index Usage 56 5 Spatial Queries 57 5.1 Determining Spatial Relationships 57 5.1.1 Dimensionally Extended PostgreSQL releases, X3D support, TIGER geocoder support, management functions. Darafei Praliaskouski Index improvements, bug fixing and geometry/geography function improvements, SFCGAL, raster, GitHub curation project. General bug fixing, geography support, geography and geometry index support (2D, 3D, nD index and anything spatial index), underlying geometry internal structures, GEOS functionality integration

cppcon_add_library(complete LIBRARIES Asio::asio) add_subdirectory(tests)

cppcon_add_library(service LIBRARIES Asio::asio) add_subdirectory(tests)

cppcon_add_library(no_service LIBRARIES Asio::asio) add_subdirectory(tests)

cppcon_add_library(async_initiate LIBRARIES Asio::asio) add_subdirectory(tests)

localization - Licensing translations - Translation process - Checks and fixups - Machine translation - Add-ons - Translation Memory - Configuration - Sample configuration - Management commands - Announcements contributing code to Weblate • Weblate source code • Debugging Weblate • Weblate internals • Developing add-ons • Weblate frontend • Reporting issues in Weblate • Weblate testsuite and continuous integration series • Weblate 1.x series • Weblate 0.x series ## I ndices and tables • Index • HTTP Routing Table • Python Module Index ## Weblate basics ## Project and component structure In Weblate translations

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