running the query on a table with 3 salt buckets (previously 128) brought down the time to single digits sec, what could be the possible explanation?
On Tue, Mar 11, 2014 at 3:30 PM, alex kamil <[email protected]> wrote: > running the below query in sqlline takes less than 4 sec but when calling > from Java client the first resultSet.next() is much slower (>20 sec), any > ideas? > > > client code > > String JDBC_DRIVER = "jdbc:phoenix:myip"; > > String query = "SELECT ROWKEY FROM mytable LIMIT 10000"; > > //ROWKEY size=32bytes, mytable size=4M rows (128 regions on 3 servers > with 40GB heap) > > Class.forName("com.salesforce.phoenix.jdbc.PhoenixDriver"); > > DriverManager.getConnection(JDBC_DRIVER); > > Connection con = DriverManager.getConnection(JDBC_DRIVER); > > Statement stmt = con.createStatement(); > > ResultSet resultSet =stmt.executeQuery(query); > > Object o = null; int i=0;boolean isFirst = true; > > long start = System.currentTimeMillis(); > > * while(resultSet.next())*{ > > if (isFirst){ > > System.out.println("*Time taken for first getNext() *: " + > (System.currentTimeMillis() - start)); > > isFirst = false; > > } > > for (i = 0; i < colmax; ++i) > > { > > o = resultSet.getObject(i + 1); > > if (o != null){ > > //rowKeys.add(o.toString()); > > } > > } > > } > > System.out.println("Time taken to loop through : " + > (System.currentTimeMillis() - start)); > > > >
