On 27-Sep-07, at 3:35 PM, Bouis, Laurent wrote:
What is the difference between the
<maxBufferedDocs>1000</maxBufferedDocs>, and the
<autoCommit><maxDocs>1000</maxDocs>...</autoCommit> parameters in
solrconfig.xml?
Do they influence the frequency of flush to disk and document
distribution in segments in a different way?
maxBufferedDocs affects disk flushing behaviour, but is purely a
lucene-level thing that might affect performance and memory usage,
but not semantics.
autoCommit is a Solr-level option that affects when added document
become visible to searches (very important to search semantics). A
side-effect of a commit is a lucene-level flush, so if
maxBufferedDocs > autoCommit it does not have any effect.
cheers,
-Mike
