[v3.29] Free dedupe buffer's tracking map after shrink #9538
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Go doesn't free map blocks, even after a map shrinks considerably. The dedupe buffer tends to store a lot of keys for a start-of-day snapshot, make sure we clean up the leaked map capacity once we're back down to zero. Upstream issue: golang/go#20135
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Description
Go doesn't free map blocks, even after a map shrinks considerably. The dedupe buffer tends to store a lot of keys for a start-of-day snapshot, make sure we clean up the leaked map capacity once we're back down to zero.
Related issues/PRs
Upstream issue: golang/go#20135
Pick of #9526
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