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TiDB needs double full load schema when restart in million tables scenario

component/ddlThis issue is related to DDL of TiDB.This issue is related to DDL of TiDB.

severity/moderate

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#58821 In pingcap/tidb;

· lilinghai opened on Jan 9, 2025

QPS periodically drops to the bottom when decrease info schema cache size

component/ddlThis issue is related to DDL of TiDB.This issue is related to DDL of TiDB.

may-affects-5.4This bug maybe affects 5.4.x versions.This bug maybe affects 5.4.x versions.

may-affects-6.1

may-affects-6.5

may-affects-7.1

may-affects-7.5

may-affects-8.1

may-affects-8.5

severity/major

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#58744 In pingcap/tidb;

· lilinghai opened on Jan 7, 2025

Promptly release the table information held in the stats cache that has already been removed from the information schema

type/enhancementThe issue or PR belongs to an enhancement.The issue or PR belongs to an enhancement.

Status: Open.

#58740 In pingcap/tidb;

· lilinghai opened on Jan 7, 2025

Region is not balanced when Lighting import million tables

affects-8.5This bug affects the 8.5.x(LTS) versions.This bug affects the 8.5.x(LTS) versions.

component/lightningThis issue is related to Lightning of TiDB.This issue is related to Lightning of TiDB.

may-affects-5.4This bug maybe affects 5.4.x versions.This bug maybe affects 5.4.x versions.

may-affects-6.1

may-affects-6.5

may-affects-7.1

may-affects-7.5

may-affects-8.1

severity/major

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#58508 In pingcap/tidb;

· lilinghai opened on Dec 24, 2024

statistics_stats_cache metric is wrong in millions tables scenario

affects-8.5This bug affects the 8.5.x(LTS) versions.This bug affects the 8.5.x(LTS) versions.

component/statistics

severity/moderate

sig/plannerSIG: PlannerSIG: Planner

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#58196 In pingcap/tidb;

· lilinghai opened on Dec 12, 2024

Some metrics for DDL Backfill need to be optimized in million tables scenario

affects-8.5This bug affects the 8.5.x(LTS) versions.This bug affects the 8.5.x(LTS) versions.

component/ddlThis issue is related to DDL of TiDB.This issue is related to DDL of TiDB.

severity/moderate

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#58143 In pingcap/tidb;

· lilinghai opened on Dec 11, 2024

Stale read is very slow in many ddls scenario

type/questionThe issue belongs to a question.The issue belongs to a question.

Status: Open.

#58037 In pingcap/tidb;

· lilinghai opened on Dec 6, 2024

Pitr restore speed is too slow for many split files in million tables scenario

affects-8.5This bug affects the 8.5.x(LTS) versions.This bug affects the 8.5.x(LTS) versions.

component/brThis issue is related to BR of TiDB.This issue is related to BR of TiDB.

may-affects-5.4This bug maybe affects 5.4.x versions.This bug maybe affects 5.4.x versions.

may-affects-6.1

may-affects-6.5

may-affects-7.1

may-affects-7.5

may-affects-8.1

severity/major

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#58002 In pingcap/tidb;

· lilinghai opened on Dec 5, 2024

The initialization of the priority queue is too slow when TiDB contains a large number of tables

affects-8.5This bug affects the 8.5.x(LTS) versions.This bug affects the 8.5.x(LTS) versions.

component/statistics

severity/major

sig/plannerSIG: PlannerSIG: Planner

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#57960 In pingcap/tidb;

· lilinghai opened on Dec 4, 2024

Br backup consumes mounts of time and gererates too many small files in million tables scenario

affects-8.5This bug affects the 8.5.x(LTS) versions.This bug affects the 8.5.x(LTS) versions.

component/brThis issue is related to BR of TiDB.This issue is related to BR of TiDB.

feature/developingthe related feature is in developmentthe related feature is in development

may-affects-5.4This bug maybe affects 5.4.x versions.This bug maybe affects 5.4.x versions.

may-affects-6.1

may-affects-6.5

may-affects-7.1

may-affects-7.5

may-affects-8.1

severity/major

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#55609 In pingcap/tidb;

· lilinghai opened on Aug 23, 2024

Modify user or privilege will consume a significant amount of time and resources in million users scenario

type/enhancementThe issue or PR belongs to an enhancement.The issue or PR belongs to an enhancement.

Status: Open.

#55563 In pingcap/tidb;

· lilinghai opened on Aug 21, 2024

stats cache cost track metric is inaccurate

component/statistics

severity/moderate

sig/plannerSIG: PlannerSIG: Planner

type/bugThe issue is confirmed as a bug.The issue is confirmed as a bug.

Status: Open.

#53776 In pingcap/tidb;

· lilinghai opened on Jun 4, 2024