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Track the memory usage of probe phase in HashJoin. #35630

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wshwsh12 opened this issue Jun 22, 2022 · 0 comments
Open

Track the memory usage of probe phase in HashJoin. #35630

wshwsh12 opened this issue Jun 22, 2022 · 0 comments
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type/enhancement The issue or PR belongs to an enhancement.

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@wshwsh12
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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.

tidb/executor/hash_table.go

Line 115 in e21b435

matched = make([]chunk.Row, 0, len(innerPtrs))

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