How to get the Index Size in Solr using Java

Question

I need to get total size of an index in Apache Solr using Java. The following code gets the total number of documents but I am looking for the size. And with the use of ReplicationHandler I was thinking that I can get the index size as told by someone here on this link.. http://lucene.472066.n3.nabble.com/cheking-the-size-of-the-index-using-solrj-API-s-td692686.html but I am not getting the index size.

BufferedWriter out1 = null;
        FileWriter fstream1 = new FileWriter("src/test/resources/solr-document-id-desc.txt");
        out1 = new BufferedWriter(fstream1);
        ApplicationContext context = null;
        context = new ClassPathXmlApplicationContext("application-context.xml");
        CommonsHttpSolrServer solrServer = (CommonsHttpSolrServer) context.getBean("solrServer");
        SolrQuery solrQuery = new SolrQuery().setQuery("*:*");

      QueryResponse rsp = solrServer.query(solrQuery);

        //I am trying to use replicationhandler but I am not able to get the index size using statistics. Is there any way to get the index size..?                        
       ReplicationHandler handler2 = new ReplicationHandler();
       System.out.println( handler2.getDescription()); 

       NamedList statistics = handler2.getStatistics();
       System.out.println("Statistics   "+ statistics); 
       System.out.println(rsp.getResults().getNumFound());

      Iterator<SolrDocument> iter = rsp.getResults().iterator();

      while (iter.hasNext()) {
                      SolrDocument resultDoc = iter.next();        
                      System.out.println(resultDoc.getFieldNames());
                      String id = (String) resultDoc.getFieldValue("numFound");
                      String description = (String) resultDoc.getFieldValue("description");
                      System.out.println(id+"~~"+description);
                      out1.write(id+"~~"+description);
                      out1.newLine();
      }
      out1.close();

    Any suggestions will be appreciated..

Update Code:-

ReplicationHandler handler2 = new ReplicationHandler();
System.out.println( handler2.getDescription()); 
 NamedList statistics = handler2.getStatistics();
 System.out.println("Statistics   "+ statistics.get("indexSize"));

My suggestion is that you make your question clearer :) You've presented code, but not said what you're trying to do or what it actually does, or any problems you've been having. Please read tinyurl.com/so-hints — Jon Skeet
@JonSkeet, I have updated the questions. let me know if it makes sense now.. — arsenal
Not really - you say you have got the index size, but that you're "not getting" it... so what happens? — Jon Skeet
I have got the number of documents in the Solr.. I need the index size..!! — arsenal
"And with the use of ReplicationHandler I was thinking that I can get the index size as told by someone here on this link" - and what was the result? — Jon Skeet

Jayendra Jayendra · Accepted Answer · 2011-10-28T19:57:46

The indexsize is available with the statistics in ReplicationHandler

org.apache.solr.handler.ReplicationHandler

code

  public NamedList getStatistics() {
    NamedList list = super.getStatistics();
    if (core != null) {
      list.add("indexSize", NumberUtils.readableSize(getIndexSize()));
    }
  }

You can use the URL http://localhost:8983/solr/replication?command=details , which returns the index size.

<lst name="details">
  <str name="indexSize">26.13 KB</str>
  .....
</lst>

Not sure if it works with the instantiation of ReplicationHandler, as it would need the reference of the core and the index.

How to get the Index Size in Solr using Java

3 Answers