Hi all,
First question:
According to documentation, hfile.block.cache.size is by default 40 percentage
of maximum heap (-Xmx setting). If -Xmx is not used and only -Xms is used, what
will it be in this case?
Second question:
This 40% heap space is shared by all entities (stores). How much block cache is
used by each store (entity)? Is it allocated on demand? If a region has never
been read after the region server is up, will block cache be allocated for it?
Third question:
Is it possible to tell from .META when a region was last read? If so, how?
Many thanks,
Linlin
