DirectByteBuffer change proposal

[Seán Coffey]

Biju,

These lists are often not suitable for JDK component specific issues. 
You should discuss your issue on the nio-dev specific mailing list :
http://mail.openjdk.java.net/mailman/listinfo/nio-dev

Regards,
Sean.

On 11/08/2015 15:11, Biju G.S Nair wrote:
> Hello All,
>     While the patch https://bugs.openjdk.java.net/browse/JDK-6857566
> currently applied to jdk 9 (which I had requested to be back ported to JDK
> 8 & 7) fixes the OOM exception during memory allocation by exponentially
> increasing the sleep time, this can negatively impact low latency
> applications using DirectByteBuffers. If we are able to provide a new JVM
> parameter which the users can set to a percentage value of DirectBuffer use
> as threshold when the "System.gc()" call in java/nio/Bits.java to be made,
> then the probability of sleep time being much lower is high. Also it gives
> users some control over when the gc() need to be requested instead of
> starting the gc() at the last moment when the direct memory is used fully.
> Without knowing all the details, to me it looks like a straight forward
> change. Let me know if there is any issue with the proposed change. If this
> change is a possibility let me know how I can make a request for this
> change.
>
> Thanks,
> Biju