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From "Ning Li" <ning.li...@gmail.com>
Subject Re: [jira] Commented: (LUCENE-843) improve how IndexWriter uses RAM to buffer added documents
Date Tue, 03 Apr 2007 15:04:08 GMT
On 4/3/07, Michael McCandless (JIRA) <jira@apache.org> wrote:

>  * With term vectors and/or stored fields, the new patch has
>    substantially better RAM efficiency.

Impressive numbers! The new patch improves RAM efficiency quite a bit
even with no term vectors nor stored fields, because of the periodic
in-RAM merges of posting lists & term infos etc. The frequency of the
in-RAM merges is controlled by flushedMergeFactor, which measures in
doc count, right? How sensitive is performance to the value of
flushedMergeFactor?

Cheers,
Ning

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