TONG, Zhigao comments

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                                            TONG, Zhigao

"Lost connection to MySQL server during query" after UPDATE statement

[Analyze Doc](https://pingcap.feishu.cn/wiki/wikcnnNpeSzKEQUYLkZ9ILg6LCg) - The direct cause of panic is that tidb generate wrong execution plan and execute `MaxOneRow` for empty output. The Projection task is from data of `ref_0`(t_yexe_d) to...

Update hardware-and-software-requirements.md

/hold

Update release-6.3.0.md

> This note seems an open issue found in 6.3, not an improvement made in 6.3. I guess we will fix it in future versions. How about we adding the...

Update release-6.3.0.md

> > We need to make an explanation that TiFlash reqiures some CPU instruction sets since v6.3.0. > > Let's put the statement in Compatibility Changes > Others. Done.

Update release-6.3.0.md

/merge

Update tiflash-overview.md

/hold

[DNM] *: Enable tiflash_fastscan variable and remove fast mode alter statment

@hongyunyan PTAL https://ci.pingcap.net/blue/organizations/jenkins/tiflash-ghpr-integration-tests/detail/tiflash-ghpr-integration-tests/8414/pipeline ``` [2022-08-29T09:53:59.517Z] File: fullstack-test2/ddl/alter_table_tiflash_replica_and_mode.test [2022-08-29T09:53:59.517Z] Error line: 35 [2022-08-29T09:53:59.517Z] Error: alter table test.t set tiflash mode fast [2022-08-29T09:53:59.517Z] Result: [2022-08-29T09:53:59.517Z] ERROR 1064 (42000) at line 1: You...