After module installation it will create chartsearch directory in OpenMRS data directory. It's a Solr home. It contains conf/ and data/ directories. Conf directory contains Solr config files, data contains index files.
To change properties, such as a daemons count and schedulers timeouts, we you should edit sorlconfig.xml file. First, find /csdataimport section.
It will look like this:
<requestHandler name="/csdataimport"
class="org.apache.solr.handler.dataimport.ChartSearchDataImportHandler">
<lst name="defaults">
<str name="config">data-config.xml</str>
<int name="daemonsCount">4</int>
<int name="patientInfoTimeout">30</int>
<int name="indexSizeManagerTimeout">30</int>
<int name="indexClearStrategy">1</int>
<int name="indexMaxPatients">30</int>
</lst>
</requestHandler>