pingcap / pingcap/tiflash

The mpp query raise TiFlash oom in the CH-benCHmark workload

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#1,995 2 comments 0 reactions 1 assignee View on GitHub

@zanmato1984 is already working on this.

Since May 27, 2021.

component/compute type/enhancement
Dominant language
C++
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Description

CH-benCHmark 10k warehouses data and tiflash replica is 2 in master cluster
Execute the ap query select count(*) from revenue1; with one thread, The Tiflash memory raise about 130GB.
If execute the sql with 2 threads, The Tiflash crash for oom.
image

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