Hi, 1. Level 5 is a compromise between best compression(9) and fastest compression(1). 2. As the code logic implies, maybe elapsedTime is better, this is just a stopwatch.
Hope this can help you. Regards, yukon On Fri, Mar 10, 2017 at 2:12 PM, ss <[email protected]> wrote: > Hello > 1、 The Rocketmq send compress message when the message size bigger than > 4*1024 ，you choose JDK deflate algorithm and set default level is > 5，I feel puzzled at this level， why 5？ why not 4,，why not 3 > .....，whether not lz4 replace defate？ > 2、In DefaultMessageStore#putMessage method : > long beginTime = this.getSystemClock().now(); > PutMessageResult result = this.commitLog.putMessage(msg); > > long eclipseTime = this.getSystemClock().now() - beginTime; > if (eclipseTime > 500) { > log.warn("putMessage not in lock eclipse time(ms)={}, bodyLength={}", > eclipseTime, msg.getBody().length); > } > eclipseTime ? what do u mean？
