>From the mailing list archive, Koji wrote:
> 1. Provide another field for highlighting and use copyField to copy plainText to the
highlighting field.
and Lance wrote: http://www.mail-archive.com/solr-user@lucene.apache.org/msg35548.html
> If you want to highlight field X, doing the termOffsets/termPositions/termVectors will
make highlighting that field faster. You should make a separate field and apply these options
to that field.
>
> Now: doing a copyfield adds a "value" to a multiValued field. For a text field, you get
a multi-valued text field. You should only copy one value to the highlighted field, so just
copyField the document to your special field. To enforce this, I would add multiValued="false"
to that field, just to avoid mistakes.
>
> So, all_text should be indexed without the term* attributes, and should not be stored.
Then your document stored in a separate field that you use for highlighting and has the term*
attributes.
I've been experimenting with this, and here's what I've tried:
<field name="body" type="text_pl" indexed="true" stored="false" multiValued="true" termVectors="true"
termPositions="true" termOff
sets="true" />
<field name="body_all" type="text_pl" indexed="false" stored="true" multiValued="true"
/>
<copyField source="body" dest="body_all"/>
... but it's still very slow (10+ seconds). Why is it better to have two fields (one indexed
but not stored, and the other not indexed but stored) rather than just one field that's both
indexed and stored?
>From the Perf wiki page http://wiki.apache.org/solr/SolrPerformanceFactors
> If you aren't always using all the stored fields, then enabling lazy field loading can
be a huge boon, especially if compressed fields are used.
What does this mean? How do you load a field lazily?
Thanks for your time, guys - this has started to become frustrating, since it works so well,
but is very slow!
-Pete
On Jul 20, 2010, at 5:36 PM, Peter Spam wrote:
> Data set: About 4,000 log files (will eventually grow to millions). Average log file
is 850k. Largest log file (so far) is about 70MB.
>
> Problem: When I search for common terms, the query time goes from under 2-3 seconds to
about 60 seconds. TermVectors etc are enabled. When I disable highlighting, performance
improves a lot, but is still slow for some queries (7 seconds). Thanks in advance for any
ideas!
>
>
> -Peter
>
>
> -------------------------------------------------------------------------------------------------------------------------------------
>
> 4GB RAM server
> % java -Xms2048M -Xmx3072M -jar start.jar
>
> -------------------------------------------------------------------------------------------------------------------------------------
>
> schema.xml changes:
>
> <fieldType name="text_pl" class="solr.TextField">
> <analyzer>
> <tokenizer class="solr.WhitespaceTokenizerFactory"/>
> <filter class="solr.LowerCaseFilterFactory"/>
> <filter class="solr.WordDelimiterFilterFactory" generateWordParts="0" generateNumberParts="0"
catenateWords="0" catenateNumbers="0" catenateAll="0" splitOnCaseChange="0"/>
> </analyzer>
> </fieldType>
>
> ...
>
> <field name="body" type="text_pl" indexed="true" stored="true" multiValued="false"
termVectors="true" termPositions="true" termOffsets="true" />
> <field name="timestamp" type="date" indexed="true" stored="true" default="NOW"
multiValued="false"/>
> <field name="version" type="string" indexed="true" stored="true" multiValued="false"/>
> <field name="device" type="string" indexed="true" stored="true" multiValued="false"/>
> <field name="filename" type="string" indexed="true" stored="true" multiValued="false"/>
> <field name="filesize" type="long" indexed="true" stored="true" multiValued="false"/>
> <field name="pversion" type="int" indexed="true" stored="true" multiValued="false"/>
> <field name="first2md5" type="string" indexed="false" stored="true" multiValued="false"/>
> <field name="ckey" type="string" indexed="true" stored="true" multiValued="false"/>
>
> ...
>
> <dynamicField name="*" type="ignored" multiValued="true" />
> <defaultSearchField>body</defaultSearchField>
> <solrQueryParser defaultOperator="AND"/>
>
> -------------------------------------------------------------------------------------------------------------------------------------
>
> solrconfig.xml changes:
>
> <maxFieldLength>2147483647</maxFieldLength>
> <ramBufferSizeMB>128</ramBufferSizeMB>
>
> -------------------------------------------------------------------------------------------------------------------------------------
>
> The query:
>
> rowStr = "&rows=10"
> facet = "&facet=true&facet.limit=10&facet.field=device&facet.field=ckey&facet.field=version"
> fields = "&fl=id,score,filename,version,device,first2md5,filesize,ckey"
> termvectors = "&tv=true&qt=tvrh&tv.all=true"
> hl = "&hl=true&hl.fl=body&hl.snippets=1&hl.fragsize=400"
> regexv = "(?m)^.*\n.*\n.*$"
> hl_regex = "&hl.regex.pattern=" + CGI::escape(regexv) + "&hl.regex.slop=1&hl.fragmenter=regex&hl.regex.maxAnalyzedChars=2147483647&hl.maxAnalyzedChars=2147483647"
> justq = '&q=' + CGI::escape('body:' + fuzzy + p['q'].to_s.gsub(/\\/, '').gsub(/([:~!<>="])/,'\\\\\1')
+ fuzzy + minLogSizeStr)
>
> thequery = '/solr/select?timeAllowed=5000&wt=ruby' + (p['fq'].empty? ? '' : ('&fq='+p['fq'].to_s)
) + justq + rowStr + facet + fields + termvectors + hl + hl_regex
>
> baseurl = '/cgi-bin/search.rb?q=' + CGI::escape(p['q'].to_s) + '&rows=' + p['rows'].to_s
+ '&minLogSize=' + p['minLogSize'].to_s
>
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