[Community Wisdom Collection] Failure Cases & Solutions | Execution Plan Inaccuracy/Error/Cache/Index/Issues with Not Using Tiflash

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This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: 【社区智慧合集】故障案例&解决方案|执行计划不准/出错/缓存/索引/不走 Tiflash 问题

| username: TiDB社区小助手

Collection Creator :sparkles: :sunglasses:: @Billmay’s Cousin

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Technical Q&A

| username: 随便改个用户名 | Original post link

Study check-in! Study check-in! :star_struck:

| username: onlyacat | Original post link

Support, support.

| username: kkpeter | Original post link

I also encountered an issue where after upgrading TiDB from 6.5 to 7.1, the execution plan changed from index_join to hash_join, causing an increase in memory usage on the TiDB nodes.

| username: 纯白镇的小智 | Original post link

I’ve encountered several of them.

| username: TIDB-Learner | Original post link

Impressive.

| username: FutureDB | Original post link

Study and learn.