mysql - mysql クエリのデータ送信が遅い理由

Question

私の質問

      SELECT Info.InfoID,
      SessionInfo.SessionInfoID,
      SessionInfo.ANI,
      ANumber.ANumber,
      tmfInfo.PTime,
      tmfInfo.PTry,
      SessionInfo.CardID,
      tmfInfo.Status
 FROM tmfInfo,
      SessionInfo,
      ANumber ,
      ANumberLog,
      ANumberGroup,
      ANumberGroupLog
WHERE (tmfInfo.IVRSessionInfoID = SessionInfo.IVRSessionInfoID)
  AND (SessionInfo.ANumberLogID = ANumber.ANumberLogID)
  AND (ANumber.AccessNumberLogID = ANumberLog.ANumberLogID)
  AND (ANumberrLog.ANumberGroupID = ANumberGroup.ANumberGroupID)
  AND (ANumberGroup.ANumberGroupLogID = ANumberGroupLog.ANumberGroupLogID)
  AND (SessionInfo.SessionCallTime >= '2013-08-01 00:00:00'
  AND (SessionInfo.SessionCallTime <= '2013-08-01 23:59:59')
  AND (ANumberLog.IsDeleted = '0')
  AND (ANumberLog.IsActive = '1')
  AND (ANumberGroupLog.IsDeleted = '0')
  AND (ANumberGroupLog.IsActive = '1')
 ORDER BY SessionInfo.SessionCallTime,tmfInfo.PTime DESC;

---

その結果、1237行（10秒）が得られます

IAMが説明コマンドを実行するとき

  id    select_type table   type    possible_keys   key key_len ref rows    Extra
   1    SIMPLE  SessionInfo range   PRIMARY,SessionCallTime,ANumberLogID    SessionCallTime 4       57536   Using where; Using temporary; Using filesort
  1       SIMPLE    Anumber ref AnumberLogID    AnumberLogID    5               SessionInfo.ANumberLogID    1   Using where
  1     SIMPLE  AnumberLog  eq_ref  PRIMARY,ANumberGroupID,IsActive,IsDeleted   PRIMARY 4   SessionInfo.ANumberLogID    1   Using where
  1 SIMPLE  AnumberGroup    eq_ref  PRIMARY,ANumberGroupLogID   PRIMARY 4   AnumberLog.ANumberGroupID   1   
  1 SIMPLE  AnumberGroupLog eq_ref  PRIMARY,IsActive,IsDeleted  PRIMARY 4   AnumberGroup.ANumberGroupLogID  1   Using where
 1  SIMPLE  tmfInfo ref IVRSessionInfoID    IVRSessionInfoID    8   SessionInfo.IVRSessionInfoID    1   

ここで 57536 行を超えるクエリを検索すると、実行に時間がかかります

データの送信 sow:__

                      Status    Duration
                     starting   0.000009
 Waiting for query cache lock   0.000003
  checking query cache for query    0.000087
          checking permissions  0.000003
         checking permissions   0.000002
         checking permissions   0.000002
         checking permissions   0.000002
         checking permissions   0.000002
         checking permissions   0.000003
                 Opening tables 0.000037
                 System lock    0.000007
 Waiting for query cache lock   0.000053
                        init    0.000039
                  optimizing    0.000018
                  statistics    0.000156
                          preparing 0.000033
           Creating tmp table   0.000029
                   executing    0.000002
          Copying to tmp table  0.353
              Sorting result    0.000238
                Sending data    7.763123
                          end   0.000009
            removing tmp table  0.000011
                           end  0.000004
                       query end    0.000004
                closing tables  0.000014
                freeing items   0.000018
            logging slow query  0.000003
          logging slow query    0.000025
                 cleaning up    0.000005