Improve the scaling doc

[DanielZhangQD]

Change Request

This repository is ONLY used to solve issues related to TiDB Operator documentation. For other issues (related to TiDB, PD, etc), please move to other repositories.

Please answer the following questions before submitting your issue. Thanks!

1. Describe what you find is inappropriate or missing in the existing docs.

Scale TiDB Cluster

• https://pingcap.com/docs/tidb-in-kubernetes/stable/scale-a-tidb-cluster/#horizontal-scaling-operations-cr
• Add a command to scale up
• Add a note that horitzontal scaling may not be successful and link to https://pingcap.com/docs/tidb-in-kubernetes/stable/troubleshoot/#the-pod-is-in-the-pending-state
• Add a note that vertical scaling may not be successf https://pingcap.com/docs/tidb-in-kubernetes/stable/scale-a-tidb-cluster/#vertical-scaling
• https://pingcap.com/docs/tidb-in-kubernetes/stable/enable-tidb-cluster-auto-scaling/ Rename Quick Start to example, add expected behaviors and what to look for when running sysbench.

2. Describe your suggestion or addition.

3. Provide some reference materials (documents, websites, etc) if you could.

[github-actions[bot]]

This issue is stale because it has been open 60 days with no activity. If no comment has been made and the lifecycle/stale label is not removed, this issue will be closed in 15 days.

[github-actions[bot]]

This issue will be closed because it has been open for 75 days with no activity. If you still have any question about this issue, feel free to reopen it or create a new one.

[DanielZhangQD]

/unassign @Yisaer

[DanielZhangQD]

/assign @dragonly

[DanielZhangQD]

/unassign @dragonly

[DanielZhangQD]

/assign @BinChenn

[csuzhangxc]

/assign @csuzhangxc

[BinChenn]

/assign @BinChenn

[BinChenn]

/unassign @csuzhangxc

[DanielZhangQD]

Fixed by https://github.com/pingcap/docs-tidb-operator/pull/317/files.