On Tue, Dec 23, 2008 at 08:36:24PM -0600, robert engels wrote: > Is there something that I am missing?
Yes. > I see lots of references to using "memory mapped" files to "dramatically" > improve performance. There have been substantial discussions about this design in JIRA, notably LUCENE-1458. The "dramatic" improvement is WRT to opening/reopening an IndexReader. Presently in both KS and Lucene, certain data structures have to be read at IndexReader startup and unpacked into process memory -- in particular, the term dictionary index and sort caches. If those data structures can be represented by a memory mapped file rather than built up from scratch, we save big. Marvin Humphrey --------------------------------------------------------------------- To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org For additional commands, e-mail: java-dev-h...@lucene.apache.org
