Lucene Performance

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Christopher Supnig edited this page Mar 13, 2013 · 1 revision

Introduction

The following page should give you some basic understanding on how to increase search and indexing performance.

Indexing Performance

If you have sufficient system memory available you can increase the number of objects fetched at a time from the requests processor:

#How many items should be processed at once. Decrease this number if you have memory problems.
index.DEFAULT.batchsize=10
#Specific batch size for the configuration block (PAGES) decrease this value if you have memory problems. (overwrites index.DEFAULT.batchsize)
index.DEFAULT.CR.PAGES.batchsize=100

Search Performance

Check your queries!

Rule of thumb: The shorter a query - the faster it is. This applies only for the standard operations.

Operations like fuzzy and wild card search take additional time.

Also the highlighting of terms in the results takes some time.

External Articles

Have a look on the following articles to better understand how lucene works:

[http://onjava.com/pub/a/onjava/2003/03/05/lucene.html?page=1]