Update SHOW STATUS docs

[dveeden]

What is changed, added or deleted? (Required)

Update the docs for SHOW STATUS

This is mostly for pingcap/tidb#48152 but it looks like we never properly documented the existing status variables.

Which TiDB version(s) do your changes apply to? (Required)

Tips for choosing the affected version(s):

By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.

For details, see tips for choosing the affected versions.

• master (the latest development version)
• v7.5 (TiDB 7.5 versions)
• v7.4 (TiDB 7.4 versions)
• v7.3 (TiDB 7.3 versions)
• v7.1 (TiDB 7.1 versions)
• v6.5 (TiDB 6.5 versions)
• v6.1 (TiDB 6.1 versions)
• v5.4 (TiDB 5.4 versions)
• v5.3 (TiDB 5.3 versions)
• v5.2 (TiDB 5.2 versions)
• v5.1 (TiDB 5.1 versions)
• v5.0 (TiDB 5.0 versions)

What is the related PR or file link(s)?

• This PR is translated from:
• Other reference link(s):

pingcap/tidb#48152

[dveeden]

Source: https://kennytm.github.io/website-docs/dist/

[yahonda]

tiup playground nightly has not include the bee28760d859ded136806927571a1594b6234c59 yet. Let me review this pull request coming Monday.

[dveeden]

tiup playground nightly has not include the bee28760d859ded136806927571a1594b6234c59 yet. Let me review this pull request coming Monday.

Thanks.

Note that if you want you can checkout pingcap/tidb from git and switch to the master branch and run make server && ./bin/tidb-server. This gives you a running TiDB server with the unistore (instead of TiKV) that you can connect to on port 4000. If something hasn't been merged you can use gh pr checkout 1234 to checkout a specific PR. The gh command is the GitHub commandline

[yahonda]

Left some comments mainly about the scope of variables.

[dveeden]

@yahonda Could you check again?

[yahonda]

Looks good to me.

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2023-11-24 02:42:58.093827328 +0000 UTC m=+545006.759053523: ☑️ agreed by ran-huang.

[ran-huang]

@dveeden Is this PR mergeable?

[dveeden]

@dveeden Is this PR mergeable?

@ran-huang Yes

[ran-huang]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ran-huang

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[qiancai]

hi @dveeden, would you please help confirm if this PR also applies to release-7.5?

[dveeden]

hi @dveeden, would you please help confirm if this PR also applies to release-7.5?

@qiancai This needs modifications when applied to release-7.5. I'll create a PR for that.

[enkilee]

/assign