On Wed, Jan 07, 2009 at 10:36:01PM -0600, robert engels wrote: > Yes, and I don't think the "worst-case" is correct. > > When you go to write that segment, you determine that it is a "large" > segment, but has few deletions (one in this case), it will be written > compressed in probably less than 10 bytes (1 byte header, vlong > start, vint length - you only write the ones...)...
If a segment slowly accumulates deletions over time during different indexing sessions, at some point you will cross the threshold where the deletions file needs to be written out as an uncompressed bit vector. From then on, adding a single additional deletion to the segment during any subsequent indexing session triggers what I'm calling "worst-case" behavior: the whole bit vector file needs to be rewritten for the sake of a one deletion. Marvin Humphrey --------------------------------------------------------------------- To unsubscribe, e-mail: java-dev-unsubscr...@lucene.apache.org For additional commands, e-mail: java-dev-h...@lucene.apache.org
