Gleb Natapov 31e803a36c storage_proxy: wire up percentile speculative read properly ...

Collect coordinator side read statistic per CF and use them in percentile
speculative read executor. Getting percentile from estimated_histogram
object is rather expensive, so cache it and recalculate only once per
second (or if requested percentile changes).

Fixes #2757

Message-Id: <20170911131752.27369-3-gleb@scylladb.com>

2017-09-14 10:31:26 +03:00

195 KiB

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