Return if the journal will use off-heap buffers (NIO RAM) instead of
on-heap buffers (byte arrays).
Returns:
true if the journal is configured to use NIO "direct buffer" RAM
getMaxPoolSize
long getMaxPoolSize()
Return the maximum size (in bytes) of the buffers that can be held by the
pool. This is not a limit of how many buffers can be allocated, since
some may be in use at any time, but rather how many will be held by the
pool (i.e. recycled) as they are released.
Returns:
the maximum size in bytes of all of the buffers that the buffer
pool can hold onto