### What changes were proposed in this pull request? Introduce `ActiveSlots` metric to represent the disk resource demand currently in the cluster. ### Why are the changes needed? It's recommended to introduce `ActiveSlots` metric to represent the disk resource demand currently in the cluster. ### Does this PR introduce _any_ user-facing change? No. ### How was this patch tested? In our test cluster (we can see the value of activeSlots increases and then back to 0 after the application finished, and slotsAllocated is increasing all the way).  Closes #2386 from CodingCat/slots_decrease. Lead-authored-by: CodingCat <zhunansjtu@gmail.com> Co-authored-by: Nan Zhu <CodingCat@users.noreply.github.com> Co-authored-by: Fei Wang <fwang12@ebay.com> Signed-off-by: mingji <fengmingxiao.fmx@alibaba-inc.com> |
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