Issues

• TiFlash OOM kills and frequent restarts during large table replica initialization (v8.5.0)

  contributiontype/bug
  pingcap/tidb#72539 · Filter by author VishwanathanRK opened on Oct 30, 2026

• expression: COMPRESS virtual generated column index misses old-written rows after Go toolchain upgrade

  contribution
  pingcap/tidb#72526 · Filter by author together-wang opened on Oct 30, 2026

• Flaky test: TestP0DirtyWrite in tests/realtikvtest/txntest

  component/testflaky-testtype/enhancement
  pingcap/tidb#72520 · Filter by author ti-chi-bot opened on Oct 30, 2026

• planner: multi-valued index cannot use a range condition on a trailing column, so keyset pagination rescans from the start of the value on every page

  contribution
  pingcap/tidb#72518 · Filter by author mittalrishabh opened on Oct 29, 2026

• information_schema.columns/statistics with a large table_name IN-list does one sequential meta RPC per table on cold infoschema v2 cache, repaid on every query

  contributionseverity/moderatesig/sql-infratype/bug
  pingcap/tidb#72516 · Filter by author choudharypankaj opened on Oct 29, 2026
  2

  

• Information_schema.ddl_jobs: filter and LIMIT are not pushed into the history scan — every query decodes the entire DDL history

  contributionseverity/moderatesig/plannertype/bug
  pingcap/tidb#72515 · Filter by author choudharypankaj opened on Oct 29, 2026
  2

• unbounded memory usage growth from Go heap profiler buckets on diverse workloads

  may-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9report/customerseverity/majorsig/executiontype/bug
  pingcap/tidb#72510 · Filter by author time-and-fate opened on Oct 29, 2026
  4

• planner: the same statistics give different estimates because getTotalRowCount uses a random column

  severity/moderatesig/plannertype/bug
  pingcap/tidb#72503 · Filter by author 0xPoe opened on Oct 29, 2026
  2

• stmtsummary: evicted v2 aggregate FIRST_SEEN retains initialization time instead of earliest execution

  contribution
  pingcap/tidb#72501 · Filter by author together-wang opened on Oct 29, 2026

• Flaky test: TestImportInto/TestGlobalSortResolvesGlobalIndexConflictsAcrossPartitions in tests/realtikvtest/importintotest4

  component/testflaky-testtype/enhancement
  pingcap/tidb#72495 · Filter by author ti-chi-bot opened on Oct 29, 2026

• executor: KILL and max_execution_time do not stop an index hash semi join on a hot join key

  may-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/majorsig/executiontype/bug
  pingcap/tidb#72481 · Filter by author 0xPoe opened on Oct 28, 2026
  6

  

• False ERROR 8133 when comparing utf8mb4_0900_ai_ci with utf8mb4_general_ci via explicit COLLATE

  contributionmay-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/majorsig/plannertype/bug
  pingcap/tidb#72475 · Filter by author circle006 opened on Oct 28, 2026
  2

• planner: support NULLS FIRST / NULLS LAST in ORDER BY without a sort

  sig/plannertype/feature-request
  pingcap/tidb#72473 · Filter by author terry1purcell opened on Oct 28, 2026

• ddl: rolled-back or failed ADD INDEX ... GLOBAL leaves its index and temp index keys without a delete range

  component/ddlseverity/moderatetype/bug
  pingcap/tidb#72466 · Filter by author joechenrh opened on Oct 28, 2026
  

• Support IMPORT INTO FROM SELECT on DXF for internal SQL

  component/importnextgentype/enhancement
  pingcap/tidb#72465 · Filter by author joechenrh opened on Oct 28, 2026

• ddl: MODIFY COLUMN reorg on a column covered by a global index leaves the old index keys without a delete range

  component/ddlseverity/moderatetype/bug
  pingcap/tidb#72464 · Filter by author joechenrh opened on Oct 28, 2026
  

• ddl: DROP COLUMN on a column covered by a global index leaves the index keys without a delete range

  component/ddlseverity/moderatetype/bug
  pingcap/tidb#72463 · Filter by author joechenrh opened on Oct 28, 2026
  

• select 65 = 97; return true

  contributionfirst-time-contributormay-affects-7.5may-affects-8.1may-affects-8.5may-affects-25.10may-affects-26.3may-affects-26.9severity/criticalsig/executiontype/bug
  pingcap/tidb#72461 · Filter by author shenghe-chen opened on Oct 28, 2026
  3

• Flaky test: TestAssertionWhenPessimisticLockLost in tests/realtikvtest/txntest

  component/testflaky-testtype/enhancement
  pingcap/tidb#72460 · Filter by author ti-chi-bot opened on Oct 28, 2026

• Flaky test: TestAsOfTimestampCompatibility in tests/realtikvtest/txntest

  component/testflaky-testtype/enhancement
  pingcap/tidb#72459 · Filter by author ti-chi-bot opened on Oct 28, 2026

• Flaky test: TestStatusServerCloseDuringStartup in pkg/server

  component/testflaky-testtype/enhancement
  pingcap/tidb#72458 · Filter by author ti-chi-bot opened on Oct 28, 2026
  1

• Accept ucs2/utf16 character set declarations in DDL as aliases for utf8mb4 (MySQL-compatibility; unblocks AWS DMS as a replication target)

  contributiontype/enhancement
  pingcap/tidb#72457 · Filter by author choudharypankaj opened on Oct 27, 2026

• use explain format=brief to replace explain in release-8.5's unit tests

  affects-8.5type/enhancement
  pingcap/tidb#72449 · Filter by author winoros opened on Oct 27, 2026
  3

  

• build: upgrade to Go 1.27.3

  affects-8.5affects-25.10affects-26.3affects-26.9sig/sql-infratype/enhancement
  pingcap/tidb#72448 · Filter by author YangKeao opened on Oct 27, 2026

• ingestor: simplify ingestctrl ownership and reduce side effects

  component/importcomponent/lightningtype/enhancement
  pingcap/tidb#72437 · Filter by author D3Hunter opened on Oct 27, 2026