franz1981 edited a comment on issue #2845: ARTEMIS-2336 Use zero copy to replicate journal/page/large message file (AGAIN) URL: https://github.com/apache/activemq-artemis/pull/2845#issuecomment-535443555 @wy96f Good analysis :) Yep, so the possible solutions I see are: - tune differently `lowWaterMark` and `highWaterMark` > 1 MB to allow chunk writer queue to be drained faster (hopefully) - split the file in smaller chunks (ie 1 MB now, probably 32K is better, configurable, even better) when `-Dio.netty.file.region=false`: not sure it would work TBH - flow control sync file sends by using the received sync file responses instead of using the Netty one (that as u have noticed require more configuration/tuning and behave differently depending if using the file region or not...)
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