Hey Sergey,

by default we now allocate direct memory without going through Bits to 
eliminate some slowdown which is caused the the openjdk impl.

If you want to have the mean back just use the following system property:
-Dio.netty.maxDirectMemory=0

This will give you the “old” behaviour.

Bye,
Norman


> On 24 Oct 2016, at 16:25, Sergey Polovko <[email protected]> wrote:
> 
> Hi,
> 
> Sorry if this will be duplicate, but it seems that previous message was not 
> sent.
> 
> After upgrading Netty from 4.0.35 to 4.1.6 in our project direct memory pool 
> is not used anymore (see brown line in attached graph). This data were 
> received with BufferPoolMXBean.getMemoryUsed() method. We do not use special 
> io.netty.* options, so basically Netty used with default configuration. Also 
> I can’t find in documentation that memory allocation scheme will be changed.
> Is this behaviour expected for Netty 4.1.x?
> 
> Platform: Linux x86_64
> JVM: HotSpot(TM) build 1.8.0_66-b17
> GC options: -XX:+UseG1GC -XX:MaxGCPauseMillis=500 -Xms2048m -Xmx2048m
> 
> --
> Sergey
> 
> <memory_usage.png>
> 
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