I read the source code and debug it .
find DefaultMessageSizeEstimator size method
public int size(Object msg) {
if (msg instanceof ByteBuf) {
return ((ByteBuf)msg).readableBytes();
} else if (msg instanceof ByteBufHolder) {
return ((ByteBufHolder)msg).content().readableBytes();
} else {
return msg instanceof FileRegion ? 0 : this.unknownSize;
}
}
if msg is my customize msg ,the size is only 8 .
so I read the code ,and channel config ChannelOption.
MESSAGE_SIZE_ESTIMATOR,
*I implement my*MessageSizeEstimator use code config
* .childOption(ChannelOption.MESSAGE_SIZE_ESTIMATOR,
MyDefaultMessageSizeEstimator.DEFAULT)*
*is it right?*
On Sunday, April 14, 2019 at 6:54:21 PM UTC+8, you fu wrote:
>
> the Netty veriosn is 4.0.42.Final
>
>
>
> On Sunday, April 14, 2019 at 6:52:47 PM UTC+8, you fu wrote:
>>
>> Hi , When my application occur OutOfDirectMemoryError, dump JVM memory
>> profile.
>>
>> the io.netty.channel.ChannelOutboundBuffer instance totalPendingSize
>> is 13,864,807,239 , and unwritable is 1.
>>
>> [image: netty1.jpg]
>>
>>
>> the server code is
>> .childOption(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK,
>> 67108864) //16MB
>> .childOption(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK,
>> 1048576) //1M
>>
>> why the totalPendingSize can increase to 13,864,807,239?
>>
>>
>>
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