Commit Graph

19 Commits

Author SHA1 Message Date
Alexey Milovidov
8a6e07f0ea Make projections production-ready 2023-05-10 03:35:13 +02:00
Han Fei
c41c2cfb1d make doc more concise 2023-03-23 20:47:29 +01:00
iammagicc
214bcdda47
delete quoat English text,change the translation
As the title says,I delete quoat English text.The Chinese translation has been modified to make it easier for readers to understand.
2023-03-21 22:09:10 +08:00
iammagicc
04bfc1848b
Merge branch 'master' into patch-2 2023-03-21 19:56:04 +08:00
iammagicc
82d71a1044
image errors and adaptive index granularity
Add a description of the relationship between image errors and adaptive index granularity.And create a new node with this description.
2023-03-21 19:53:00 +08:00
iammagicc
08549c0a02
增加最后一个索引条目存储了上图中颗粒1082的主键列的最大值与图片不符的描述
为什么图中显示的数据与结论不符合?因为图中的数据是禁用了自适应索引粒度后得到的,默认情况下索引粒度是自适应的。
https://clickhouse.com/docs/en/optimize/sparse-primary-indexes
We mentioned in the beginning of this guide in the "DDL Statement Details", that we disabled adaptive index granularity (in order to simplify the discussions in this guide, as well as make the diagrams and results reproducible).
For tables with adaptive index granularity (index granularity is adaptive by default) the size of some granules can be less than 8192 rows depending on the row data sizes.
我们在本指南开头的“DDL 语句详细信息”中提到,我们禁用了自适应索引粒度(为了简化本指南中的讨论,并使图表和结果可重现)。
对于具有自适应索引粒度的表(默认情况下索引粒度是自适应的),某些粒度的大小可以小于 8192 行,具体取决于行数据大小。


https://clickhouse.com/docs/en/whats-new/changelog/2019#experimental-features-1
ClickHouse Release 19.6.3.18, 2019-06-13
Experimental Features:实验性特性   
Add setting index_granularity_bytes (adaptive index granularity) for MergeTree* tables family.
为合并树家族的表系列添加设置index_granularity_bytes(自适应索引粒度)。

ClickHouse Release 19.10.1.5, 2019-07-12
Performance Improvement:优化改进
Add the possibility to write the final mark at the end of MergeTree columns. It allows to avoid useless reads for keys that are out of table data range. It is enabled only if adaptive index granularity is in use.
添加在合并树列末尾写入最终标记的可能性。它允许避免对超出表数据范围的键进行无用的读取。仅当使用自适应索引粒度时,才会启用它。
2023-03-21 15:53:45 +08:00
rfraposa
2c9761bca8 Update sparse-primary-indexes.md 2023-03-20 23:09:54 -06:00
iammagicc
d7a3a6dd71
Update sparse-primary-indexes.md
line424:Processed 8.19 thousand rows
line428:ClickHouse客户端的输出显示,没有进行全表扫描,只有8.19万行流到ClickHouse。
修改8.19万行为8.19千行
2023-03-20 20:50:09 +08:00
rfraposa
ac5ed141d8 New nav - reverting the revert 2023-03-17 21:45:43 -05:00
Alexander Tokmakov
ec44c8293a
Revert "New navigation" 2023-03-17 21:21:11 +03:00
rfraposa
4c842e3dca Link fixes 2023-03-09 21:19:17 -07:00
robot-clickhouse
be043cd5a5
Merge pull request #47178 from houbaron/patch-2
Update sparse-primary-indexes.md
2023-03-04 11:34:15 +01:00
houbaron
1f7a0c70f0
Update sparse-primary-indexes.md 2023-03-03 12:00:42 +08:00
houbaron
29e396cc30
Update skipping-indexes.md 2023-03-03 11:57:03 +08:00
bit-ranger
1d16dde6ba
Update sparse-primary-indexes.md to correct typo 2022-11-24 21:00:39 +09:00
bit-ranger
6606bc7ede
Update sparse-primary-indexes.md to correct typo 2022-11-24 17:56:59 +09:00
DanRoscigno
7f92006428 add slugs to all docs 2022-08-26 15:07:59 -04:00
DanRoscigno
0e6a0d589f moved image dir 2022-08-03 16:27:17 -04:00
DanRoscigno
d0c3de9da9 wrong dir 2022-08-03 15:55:12 -04:00