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The sync load could not decrease to zero, even though there is no stats cache eviction at all

component/statistics

sig/plannerSIG: PlannerSIG: Planner

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

Status: Open.

#65050 In pingcap/tidb;

· 0xPoe opened on Dec 15, 2025

The DNF expression cannot be simplified to its simplest form.

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

Status: Open.

#65048 In pingcap/tidb;

· hawkingrei opened on Dec 15, 2025

Improve Slow Log Performance and Observability

component/observability

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

Status: Open.

#65046 In pingcap/tidb;

· zimulala opened on Dec 15, 2025

update pd client and client go

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

Status: Open.

#65045 In pingcap/tidb;

· lhy1024 opened on Dec 15, 2025

Cherry pick new PRs lossy DDL optimization to release-8.5.5

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.

type/feature-requestCategorizes issue or PR as related to a new feature.Categorizes issue or PR as related to a new feature.

Status: Open.

#65040 In pingcap/tidb;

· joechenrh opened on Dec 15, 2025

planner: prefix index can lose to table full scan

severity/moderate

sig/plannerSIG: PlannerSIG: Planner

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

Status: Open.

#65027 In pingcap/tidb;

· terry1purcell opened on Dec 15, 2025

planner: optimize the optimizer's CPU and memory usage for <code>INSERT ... ON DUPLICATE KEY UPDATE</code> statements

planner/performancePerformance or resource(CPU/Mem) usage issue of the optimizerPerformance or resource(CPU/Mem) usage issue of the optimizer

sig/plannerSIG: PlannerSIG: Planner

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

Status: Open.

#65003 In pingcap/tidb;

· qw4990 opened on Dec 12, 2025

Predicate Columns Feature Evolution

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

sig/plannerSIG: PlannerSIG: Planner

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

Status: Open.

#64992 In pingcap/tidb;

· 0xPoe opened on Dec 11, 2025

BR reports TiFlash progress as 100% after PD restarts, but actual replication is not complete

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

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

Status: Open.

#64991 In pingcap/tidb;

· 3pointer opened on Dec 11, 2025

Excessive PD goroutine growth during large-scale Restore (3M regions)

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

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

Status: Open.

#64990 In pingcap/tidb;

· 3pointer opened on Dec 11, 2025

softdelete for unique index is not correct

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

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

Status: Open.

#64960 In pingcap/tidb;

· tiancaiamao opened on Dec 10, 2025

Data inconsistency when queries using TiFlash

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

component/tiflash

contributionThis PR is from a community contributor.This PR is from a community contributor.

impact/inconsistencyincorrect/inconsistency/inconsistentincorrect/inconsistency/inconsistent

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.

#64957 In pingcap/tidb;

· abisshekk5 opened on Dec 10, 2025