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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 · May be fixed by #57553
Open

Cluster suffering write hotspot after creating index #57551

tangenta opened this issue Nov 20, 2024 · 0 comments · May be fixed by #57553
Labels
affects-7.5 affects-8.1 affects-8.5 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 linked a pull request Nov 20, 2024 that will close this issue
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@jebter jebter added the component/ddl This issue is related to DDL of TiDB. label Nov 22, 2024
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affects-7.5 affects-8.1 affects-8.5 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