实时数仓 Hologres数据量的相关内容

Hologres如果不涉及外表的限制，同时数据量小于200G，使用外表和内表查询性能有区别么？

Hologres扫描6个分区（6个分区数据量大概是1.5亿条），还有优化空间吗？

Hologres扫描6个分区（6个分区数据量大概是1.5亿条），只查 count(distinct user_id) 的话，查询时间2秒左右，还有优化空间吗？

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Hologres扩容会影响服务使用？说是元数据量大的话，这个影响时间还会更长，怎么评估这个元数据量？

Hologres扩容会影响服务使用？说是元数据量大的话，这个影响时间还会更长，怎么评估这个元数据量？或者说有哪些因素会导致这个影响时间延长？

Hologres 10亿级别的数据量，里面我增加了一个bitmap索引，这个索引是异步后面增加的吗?

Hologres 10亿级别的数据量，里面我增加了一个bitmap索引，执行只要几十毫秒，这个索引是异步后面增加的吗?我怎么判断执行完了呢？我发现等值查询的速度并没有增加

Hologres上只创建了几张表，总数据量不超过4M，现在每天消耗近200CU，这正常吗？

Hologres上只创建了几张表，总数据量不超过4M，也没有调度任务运行，现在每天消耗近200CU，这正常吗？

Dataworks实时同步mysql数据到hologres，同步数据量不大的情况下时延太高（4 s？

Dataworks实时同步mysql数据到hologres，同步数据量不大的情况下时延太高（4 s~ 15s)，有优化方案么？

咨询一下，Hologres中我有一张行存表是FLINK写入的数据，数据量就40W，但统计信息显示？

咨询一下，Hologres中我有一张行存表是FLINK写入的数据，数据量就40W，但统计信息显示total_rows有460亿，执行analyze tablenam后total_rows没有缩小，相关的执行计划我感觉都不是真实的。这是属于行存表的特性？

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更新时间 2024-05-01 09:36:45

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