What does the time look like if you run your query twice in the same JVM,
as I suspect you may be hitting a one-time cost:
for (int i =0; i < 2; i++) {
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));
}
On Tue, Mar 11, 2014 at 12:57 PM, alex kamil <[email protected]> wrote:
> 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));
>>
>>
>>
>>
>
