Track the memory usage of probe phase in HashJoin.
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type/enhancement
- Dominant language
- Go
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Description
## Enhancement
Track the memory usage of probe phase in HashJoin.
e,g. The memory usage of the matched row. In extreme cases, the memory usage of this part may be the size of the entire hashmap.
https://github.com/pingcap/tidb/blob/e21b435d0c4d538677ede2fd11b4376e22d1615d/executor/hash_table.go#L115
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