Memory leak or client side caching?

Hi,

Executing the following code results in an increase of 1GB in memory
usage by the process.

String sql = "SELECT

cd_id,cd_fp1,cd_fp2,cd_fp3,cd_fp4,cd_fp5,cd_fp6,cd_fp7,cd_fp8,cd_fp9,cd_fp10,cd_fp11,cd_fp12,cd_fp13,cd_fp14,cd_fp15,cd_fp16,cd_smiles

FROM editexample1";
PreparedStatement ps = conn.prepareStatement(sql);
try {
    ResultSet rs = ps.executeQuery();
    try {
        while (rs.next()) {
            int cdId = rs.getInt(1);
            for (int i = 0; i < 16; i++) {
                int fp = rs.getInt(i+2);
            }
            String cdSmiles = rs.getString(18);
        }
    } finally {
        rs.close();
    }
} finally {
    ps.close();
}

The result set contains 1 250 000 rows.

I am not sure if this is a memory leak or the driver just caches the
result set on the client side. If this is the latter, is there a way to
turn off client side caching? If the former, how should I proceed to
find the problem?

Thank you!

Peter