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Introduce Timeline tracing to TiDB and TiKV, to track the execution information of each step of a specific statement (instead of all statements via metrics).
Simplify the process of discovering performance issues, as well as diagnosing their root causes.
As the first stage, we focus on these specific root causes:
We will do the following task items (the list is growing and the task item may not be TiDB only):
Some previous attempts under this scope:
Category
Value
Value description
(TBD)
Value score
Workload estimation
Time
Time
GanttStart: 2020-08-01
GanttDue: 2020-11-30
GanttProgress: 80%
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