On 2/8/2013 4:11 PM, Alexandre Rafalovitch wrote:
Sorry Shawn,
Somehow I am still not quite grasping it. I would really appreciate if
somebody (or even you) could have another go at very small part of this.
Maybe it will clear it up:
Similarly, in performance section of Wiki, it says: "A commit (including
a soft commit) will free up almost all heap memory"
Why? What is the "hard work" that hard commit does and soft commit does not
but still commit to disk. Is it some sort of Lucene segment finalization
and new segment creation?
I don't know the answers to those questions, except to say that
committing to disk involves I/O latency. With standard hard disks, it's
a LOT of latency.
Thanks,
Shawn
