SlabMemoryPool page size

[muratg]

From @tmds on March 6, 2018 10:0

SlabMemoryPool is using PageSize.

private static readonly int _pageSize = Environment.SystemPageSize;
private const int _blockCount = 32;

Suppose page size is large, e.g. 2MB. Now our application is using 2MB buffers and a slab is 64MB.
Perhaps it is desired to still use 4KB buffers and have a slab of 2MB?

CC @davidfowl @benaadams

Copied from original issue: aspnet/KestrelHttpServer#2365

[muratg]

From @davidfowl on March 6, 2018 10:29

Yea, that change is dubious @benaadams. We might be better off going with a fixed value here.

[muratg]

From @benaadams on March 6, 2018 19:48

dotnet/corefxlab#2099 (comment)

[muratg]

Moving to Common repo: https://github.com/aspnet/Common/blob/dev/shared/Microsoft.Extensions.Buffers.Sources/SlabMemoryPool.cs#L24

[aspnet-hello]

This issue was moved to dotnet/aspnetcore#2955