[Dynamic Regions] enable slow-trend-scheduler by default #6868
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close #6868, close tikv/tikv#15267, ref tikv/tikv#15271 This pr contains: + Enable `evict-slow-trend` scheduler on `raft-kv2` as default. + Optimize the detection strategy on the perception of Network I/O delays on TiKV nodes. Signed-off-by: lucasliang <nkcs_lykx@hotmail.com>
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Bug Report
What did you do?
1、inject one of tikv io hang
What did you expect to see?
qps can recover within 5mins
What did you see instead?
qps can not recover within 5mins due to slow-trend-scheduler is disable by default
What version of PD are you using (
pd-server -V)?pd githash：ef81248494d86bb7bc804af5299a113882ac93ec
tikv githash：284ff3a9ca144619f5efaa357d6c287f1c669982
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