mysql - /tmp dir でより多くのスペースを消費するクエリと、実行中の負荷と時間の増加

Question

/tmp/ディレクトリでより多くの時間、負荷、およびスペースを取っている以下のクエリを見つけてください

SELECT DISTINCT pil.pilsellersku,
  pil.pilname,
  pbi.pbicode,
  '',
  group_concat(DISTINCT ppt.pptcmtrfnum SEPARATOR ','),
  pbi.pbibrand,
  '',
  '',
  '',
  '',
  pil.pilicmdisplaycolor,
  pbi.pbidesc,
  pbi.pbiattrlabel1,
  pil.pilattrvalue1,
  pbi.pbiattrlabel2,
  pil.pilattrvalue2,
  pbi.pbiattrlabel3,
  pil.pilattrvalue3,
  '',
  pod.PODISBESTSELLER,
  pod.PODISNEWARRIVAL,
  pod.PODISCHOSEN,
  pit.pitzoomimage,
  pit.pitimage,
  pil.pilimage,
  pit.pitthumbnailimage,
  pit.pitthumbnailimage,
  pil.pilmrp,
  pod.PODMARGIN,
  pod.PODRETCOST,
  pbi.pbidiscvalue,
  pbi.pbidiscinvalue,
  pil.pilvat,
  pil.pilstockqty,
  pil.PILASRTGRP,
  sot.sotsomrfnum,
  group_concat(DISTINCT ppm.PPMPMTRFNUM SEPARATOR ','),
  ccg.ccgrfnum,
  pil.pilactive,
  pbi.pbiisgiftwrap,
  pbi.pbigiftwrapcharge,
  pbi.pbiispreffdate,
  pbi.pbissirfnum,
  pod.PODSTSL,
  '',
  '',
  pod.PODPVC,
  pod.PODWSPRICE,
  pod.PODODV,
  pod.PODSEQ,
  pod.PODSTCODE,
  pod.PODTAXATTRI,
  pod.PODPRODUNIT,
  pod.PODSTDCOST,
  pod.PODMATCODE,
  pod.PODWEEK,
  pod.PODYEAR,
  pod.PODDYRWK,
  pod.PODISBESTBUY,
  pbi.isonline,
  pbi.pbiseqnum,
  scm.scmcode
FROM Ismpbi pbi
LEFT JOIN ISMPIL pil
  ON pbi.pbirfnum = pil.pilpbirfnum
LEFT JOIN ISMPIT pit
  ON pbi.pbirfnum = pit.pitpbirfnum
    AND pit.pitviewseq = 1
LEFT JOIN ISMSOT sot
  ON sot.sotpbirfnum = pbi.pbirfnum
LEFT JOIN OTHPOD pod
  ON pod.podpbirfnum = pbi.pbirfnum
LEFT JOIN ISMPPM ppm
  ON ppm.ppmpbirfnum = pbi.pbirfnum
LEFT JOIN ISMPPT ppt
  ON ppt.pptpbirfnum = pbi.pbirfnum
LEFT JOIN ISMCCG ccg
  ON pbi.pbiccgrfnum = ccg.ccgrfnum
LEFT JOIN OCTSCM scm
  ON pbi.pbiscmrfnum = scm.scmrfnum
WHERE pbi.PBIBRAND = 35
GROUP BY pil.pilsellersku;

上記のクエリでは、結合されたすべての列 & where 条件列 (つまりpbi.PBIBRAND& pit.pitviewseq) にインデックスが付けられます。

そして、ステートメントを次のように説明します。

 +----+-------------+-------+--------+-------------------------------------------+--------------+---------+-------------------------+------+----------------------------------------------+ 
 | id | select_type | table | type   | possible_keys                             | key          | key_len | ref                     | rows | Extra                                        |
 +----+-------------+-------+--------+-------------------------------------------+--------------+---------+-------------------------+------+----------------------------------------------+ 
 |  1 | SIMPLE      | pbi   | ref    | IDX_PBIBRAND                              | IDX_PBIBRAND | 9       | const                   | 4420 | Usingwhere; Using temporary; Using filesort  |  
 |  1 | SIMPLE      | pil   | ref    | IDX_PILPBI                                | IDX_PILPBI   | 8       | apparel.pbi.PBIRFNUM    |    3 |                                              | 
 |  1 | SIMPLE      | pit   | ref    | IDX_PITPBI                                | IDX_PITPBI   | 8       | apparel.pbi.PBIRFNUM    |    9 |                                              |  
 |  1 | SIMPLE      | sot   | ref    | PRIMARY,SOTPBIRFNUM,IDX_SOTPBI            | PRIMARY      | 8       | apparel.pbi.PBIRFNUM    |    1 | Using index                                  |
 |  1 | SIMPLE      | pod   | ref    | PODPBIRFNUM,FK_POD_PBI,FK8B908042468F70B6 | PODPBIRFNUM  | 9       | apparel.pbi.PBIRFNUM    |    1 |                                              |
 |  1 | SIMPLE      | ppm   | ref    | IDX_PPMPBI                                | IDX_PPMPBI   | 8       | apparel.pbi.PBIRFNUM    |    1 |                                              |  
 |  1 | SIMPLE      | ppt   | ref    | PRIMARY,PPTPBIRFNUM,IDX_PPTPBI            | PRIMARY      | 8       | apparel.pbi.PBIRFNUM    |    1 | Using index                                  |  
 |  1 | SIMPLE      | ccg   | eq_ref | PRIMARY,CCGRFNUM                          | PRIMARY      | 8       | apparel.pbi.PBICCGRFNUM |    1 | Using index                                  | 
 |  1 | SIMPLE      | scm   | eq_ref | PRIMARY,SCMRFNUM                          | PRIMARY      | 8       | apparel.pbi.PBISCMRFNUM |    1 |                                              | 
 +----+-------------+-------+--------+-------------------------------------------+--------------+---------+-------------------------+------+----------------------------------------------+
 9 rows in set (0.00 sec)

上記のクエリには約 17 分かかります。サーバーの負荷は 15 を超えており/tmp/、ディスク レベルの方向は 21 GB を消費しています。

結果を得るためにクエリを最適化および変更することを提案できますか。