We are attempting to improve our Solr response time as our application uses
Solr for large and time consuming queries. We have found a very inconsistent
result in the time elapsed when pinging Solr. If we ping Solr from a desktop
Windows 7 machine, there is usually a 5 ms elapsed time. But if we ping the
same Solr instance from a Windows Server 2008 machine, it takes about 15 ms.
This could be the difference between a 1 hour process and a 3 hour process,
so it is something we would like to debug and fix if possible.
Does anybody have any ideas about why this might be? We get these same
results pretty consistently (testing on multiple desktops and servers). One
thing that seemed to have an impact is removing various additional JDKs that
had been installed, and JDK 1.7u67 specifically seemed to make a difference.
Finally, the code we are suing to test this is below. If there is a better
test I would be curious to hear that as well.
Thanks,
Scott
package solr;
import org.apache.commons.lang.StringUtils;
import org.apache.solr.client.solrj.SolrQuery;
import org.apache.solr.client.solrj.SolrRequest.METHOD;
import org.apache.solr.client.solrj.impl.BinaryRequestWriter;
import org.apache.solr.client.solrj.impl.BinaryResponseParser;
import org.apache.solr.client.solrj.impl.HttpSolrServer;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.client.solrj.response.SolrPingResponse;
import org.apache.solr.common.SolrDocumentList;
public class SolrTest {
private HttpSolrServer server;
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
SolrTest solr = new SolrTest(args);
// Run it a few times, the second time runs
a lot faster.
for (int i=0; i<3; i++) {
solr.execute();
}
}
public SolrTest(String[] args) throws Exception {
String targetUrl = args[0];
System.out.println("=============System
properties=============");
System.out.println("Start solr test.... " +
targetUrl);
server = new HttpSolrServer("http://"; +
targetUrl + ":8111/solr/search/");
server.setRequestWriter(new
BinaryRequestWriter());
server.setParser(new
BinaryResponseParser());
server.setAllowCompression(true);
server.setDefaultMaxConnectionsPerHost(128);
server.setMaxTotalConnections(128);
SolrPingResponse response = server.ping();
System.out.println("Ping time: " +
response.getElapsedTime() + " ms");
System.out.println("Ping time: " +
response.getElapsedTime() + " ms");
}
private void execute() throws Exception {
SolrQuery query = new SolrQuery();
query.setParam("start", "0");
query.setParam("rows", "1");
long startTime = System.currentTimeMillis();
QueryResponse queryResponse =
server.query(query, METHOD.POST);
long elapsedTime =
(System.currentTimeMillis() - startTime);
SolrDocumentList results =
queryResponse.getResults();
long totalHits = results.getNumFound();
System.out.println("Search hits:" +
totalHits
+ ". Total
elapsed time:" + elapsedTime + " ms"
+ ". Solr
elapsed time:" + queryResponse.getElapsedTime() + " ms"
+ ". Solr
query time:" + queryResponse.getQTime() + " ms"
+ ". Params:
" + getSearchParams(query));
}
/**
* Formats solr query parameters so that we know what's passed to solr.
* @param query
* @return
*/
private String getSearchParams(SolrQuery query) {
StringBuilder sb = new StringBuilder();
boolean first = true;
for (String name :
query.getParameterNames()) {
if (first) {
first =
false;
} else {
sb.append(";
");
}
sb.append(name).append(":[").append(StringUtils.join(query.getParams(name),
", ")).append("]");
}
return sb.toString();
}
}
