Which MemoryService to use

[Chetan Mehrotra <ch...@gmail.com>]

In the codebase I can see various MemoryManagerService

1. MemoryManagerServiceImpl - Uses MergingByteBufferAllocator.
2. UnsafeMemoryManagerServiceImpl - Uses LazyUnsafeAllocator
3. One which can potentially use Partion Buffer [1]

Of the above #1 is used by default

Given that one is running on Oracle JDK and Unsafe is accessible which
one should be used?

Also any recommendation on what values should be used for
* numberOfBuffers
* size of buffer

Should one create few big buffers e.g. 1 GB each or more number of large buffers

Chetan Mehrotra
[1] https://github.com/noctarius/directmemory/blob/buffer/directmemory-buffer

Re: Which MemoryService to use

["Raffaele P. Guidi" <ra...@gmail.com>]

Buffers size should ideally be 2gb (maximum allowed) and their number
depends on your total memory availability and needs - remember to set the
JVM parameter xx:maxdirectmemorysize accordingly.
The default implementation should be the more stable and overall efficient
but feel free to experiment with the others.

Ciao,
    R
Il 14/gen/2014 17:22 "Chetan Mehrotra" <ch...@gmail.com> ha
scritto:

> In the codebase I can see various MemoryManagerService
>
> 1. MemoryManagerServiceImpl - Uses MergingByteBufferAllocator.
> 2. UnsafeMemoryManagerServiceImpl - Uses LazyUnsafeAllocator
> 3. One which can potentially use Partion Buffer [1]
>
> Of the above #1 is used by default
>
> Given that one is running on Oracle JDK and Unsafe is accessible which
> one should be used?
>
> Also any recommendation on what values should be used for
> * numberOfBuffers
> * size of buffer
>
> Should one create few big buffers e.g. 1 GB each or more number of large
> buffers
>
> Chetan Mehrotra
> [1]
> https://github.com/noctarius/directmemory/blob/buffer/directmemory-buffer
>