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Cluster suffering write hotspot after creating index #57551

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tangenta opened this issue Nov 20, 2024 · 0 comments · Fixed by #57553
Closed

Cluster suffering write hotspot after creating index #57551

tangenta opened this issue Nov 20, 2024 · 0 comments · Fixed by #57553
Labels
affects-7.5 This bug affects the 7.5.x(LTS) versions. affects-8.1 This bug affects the 8.1.x(LTS) versions. affects-8.5 This bug affects the 8.5.x(LTS) versions. component/ddl This issue is related to DDL of TiDB. severity/major type/bug The issue is confirmed as a bug.

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@tangenta
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Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

A write workload that has high concentration of writes to a small range of index columns.

2. What did you expect to see? (Required)

No write hotspot.

3. What did you see instead (Required)

One of the TiKV instances is overloaded due to the index write hotspot.

4. What is your TiDB version? (Required)

master
@tangenta tangenta added type/bug The issue is confirmed as a bug. severity/major affects-7.5 This bug affects the 7.5.x(LTS) versions. affects-8.1 This bug affects the 8.1.x(LTS) versions. affects-8.5 This bug affects the 8.5.x(LTS) versions. labels Nov 20, 2024
@tangenta tangenta mentioned this issue Nov 20, 2024
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13 tasks
@jebter jebter added the component/ddl This issue is related to DDL of TiDB. label Nov 22, 2024
@ti-chi-bot ti-chi-bot bot closed this as completed in 177a03c Dec 18, 2024
@tangenta tangenta mentioned this issue Dec 19, 2024
Merged
13 tasks
ti-chi-bot bot pushed a commit that referenced this issue Dec 23, 2024
@tangenta
parser: support pre-split global index add special comment support fo…
3735ed5 
…r pre_split index option (#58408)

ref #57551, ref #57552
This was referenced Dec 23, 2024
Merged
Closed
@ti-chi-bot ti-chi-bot mentioned this issue Dec 26, 2024
Open
13 tasks
tangenta added a commit to ti-chi-bot/tidb that referenced this issue Dec 30, 2024
@tangenta
parser: support pre-split global index add special comment support fo…
30eba16 
…r pre_split index option (pingcap#58408)

ref pingcap#57551, ref pingcap#57552
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affects-7.5 This bug affects the 7.5.x(LTS) versions. affects-8.1 This bug affects the 8.1.x(LTS) versions. affects-8.5 This bug affects the 8.5.x(LTS) versions. component/ddl This issue is related to DDL of TiDB. severity/major type/bug The issue is confirmed as a bug.
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ddl: support pre-split index regions before creating index tangenta/tidb
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@jebter @tangenta