On a server with 4GB of RAM our D application consumes about 1GB.
Today we have increased server memory to 6 Gb and the same application under the same conditions began to consume about 3Gb of memory.
Does GC greediness depend on available RAM?

On Tue, 05 Jan 2016 16:07:36 +0000, Jack Applegame wrote:

> On a server with 4GB of RAM our D application consumes about 1GB.
> Today we have increased server memory to 6 Gb and the same application
> under the same conditions began to consume about 3Gb of memory.
> Does GC greediness depend on available RAM?

My understanding is that the GC won't return collected memory to the OS unless a threshold relative the system total is crossed.  You can use GC.minimize() from core.memory to decrease this.  This could result in degraded performance.

On Tuesday, 5 January 2016 at 17:20:07 UTC, Justin Whear wrote:
> On Tue, 05 Jan 2016 16:07:36 +0000, Jack Applegame wrote:
>
>> On a server with 4GB of RAM our D application consumes about 1GB.
>> Today we have increased server memory to 6 Gb and the same application
>> under the same conditions began to consume about 3Gb of memory.
>> Does GC greediness depend on available RAM?
>
> My understanding is that the GC won't return collected memory to the OS unless a threshold relative the system total is crossed.  You can use GC.minimize() from core.memory to decrease this.  This could result in degraded performance.

Also see: https://dlang.org/spec/garbage.html