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Explication détaillée de MySQL utilisant un profil pour analyser des exemples de code SQL lent
- 黄舟original
- 2017-03-16 13:36:051448parcourir
Récemment, une requête d'instruction SQL utilisant le sous-enfant query est très lente et affecte sérieusement les performances, elle doit donc être optimisée. L'article suivant présente principalement vous à propos de MySQLUtilisez profichier pour analyser les informations pertinentes de Slow SQL. L'article le présente en détail. Les amis qui en ont besoin peuvent s'y référer ci-dessous.
Utiliser le profil pour analyser SQL lent
L'objectif principal de l'analyseur de performances SQL de MySQL est d'afficher l'utilisation de diverses ressources pendant tout le processus d'exécution SQL. Cela montre mieux les problèmes de performances d'un mauvais SQL. Récemment, j'ai rencontré une instruction SQL avec une requête relativement lente. Cela a pris environ 0,8 seconde et a sérieusement affecté les performances, elle a donc dû être optimisée. . L'interrogation d'une seule table ou la sous-requête d'enregistrements est très rapide. Jetons un coup d'œil à l'introduction détaillée ci-dessous
Ouvrir le profil. <.>
mysql> show profiles; -- 查看是否开启 Empty set, 1 warning (0.00 sec) mysql> set profiling=1; -- 开启profile Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> show profiles; Empty set, 1 warning (0.00 sec) mysql>
Exécuter des requêtes pour faciliter les enregistrements de suivi de profil
mysql> SELECT SQL_NO_CACHE -> t1.amount, -> t1.count, -> t1.date , -> (SELECT (CONCAT(t2.APPROVE_ID,'|' ,t2.PATH)) AS RECEIPT FROM TB_BIS_MERCHANT_SETTLEMENT t2 WHERE t2.`MERCHANT_ID` = t1.`MERCHANT_ID` AND t2.`DATE`=t1.DATE AND t2.APPROVE_STATUS=5) AS receipts -> FROM -> TB_BIS_MERCHANT_TURNOVER t1 -> WHERE t1.MERCHANT_ID='64884DE062BC11E682B00017FA000202' -> ORDER BY t1.date DESC -> -> LIMIT 0,100; +-----------+-------+----------+------------------------------------------------------------------------------------------------------------+ | amount | count | date | receipts | +-----------+-------+----------+------------------------------------------------------------------------------------------------------------+ | 15800.00 | 1 | 20170105 | 0DDFD555F93B45BEB0905B1E6DE89D29|http://testxxx.cn/group1/M00/00/49/CvkBIlhu-yqABqmAABYR7dHOmno819.jpg | | 1245.00 | 1 | 20170104 | 0DDFD555F93B45BEB0905B1E6DE89D29|http://testxxx.cn/group1/M00/00/4F/CvkBIVhtpSeAI_YHAADNjq7TPq8244.jpg | | 14766.00 | 4 | 20170103 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/45/CvkBIlhrrf6AQ5uIAAEobJv68FU398.jpg | | 32449.00 | 2 | 20170102 | 0DDFD555F93B45BEB0905B1E6DE89D29|http://testxxx.cn/group1/M00/00/4C/CvkBIVhrDguAfaMIABjKB9uvu04477.jpg | | 37246.00 | 5 | 20170101 | 0DDFD555F93B45BEB0905B1E6DE89D29|http://testxxx.cn/group1/M00/00/4A/CvkBIVhpCnGASEyLAAEu6l9SI0o812.jpg | | 105094.00 | 2 | 20161231 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/49/CvkBIVhnwp-ALIvWAAEAaGPayjg732.jpg | | 88032.00 | 3 | 20161230 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/47/CvkBIVhmaqSAHcEZAAFAyS8Zx8Q067.jpg | | 3845.00 | 1 | 20161229 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/3F/CvkBIlhl206AaS-FAAFMhvX8PYY578.jpg | | 2118.00 | 4 | 20161228 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/3D/CvkBIlhjxhyAMOfhAAD8wUzTUUY855.jpg | | 2980.00 | 1 | 20161227 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/3B/CvkBIlhicfCAFmwgAAE9ULPqEJ4030.jpg | | 1080.00 | 1 | 20161226 | 667E240C44B4469892C261CE9243A8C3|http://testxxx.cn/group1/M00/00/42/CvkBIVhhy6iAMm8tAAFHOT5zBiM875.jpg | | 2980.00 | 1 | 20161225 | 0DDFD555F93B45BEB0905B1E6DE89D29|http://testxxx.cn/group1/M00/00/40/CvkBIVhfzCWAdw2LAAFpDXmwio4327.jpg | | 10201.00 | 1 | 20161224 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/38/CvkBIlhfJfKAIoBiAADqgbF1pBo054.jpg | | 3003.00 | 4 | 20161223 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/3D/CvkBIVhdMHeAQi8cAAGAOQTgxLo422.jpg | | 2698.00 | 1 | 20161222 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/3C/CvkBIVhb2U2AXWRuAAEc4LIr2nc172.jpg | | 990.00 | 1 | 20161221 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/3B/CvkBIVhbM6aAGMQAAAEQ9ptn0FU333.jpg | | 1427.00 | 1 | 20161220 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/31/CvkBIlhZNJqAAsvWAAGuJ6g1pyU541.jpg | | 2465.00 | 1 | 20161219 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/30/CvkBIlhX4_mAfn-SAAEptH1Fyp8152.jpg | | 2360.00 | 1 | 20161218 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/2F/CvkBIlhWl_-AclhbAAGLv79hoh8428.jpg | | 3998.00 | 1 | 20161217 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/35/CvkBIVhVSLGAFct_AAFQRetyWnc285.jpg | | 0.00 | 0 | 20161216 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/2D/CvkBIlhU8g-AXywcAAGn1gdsQQc959.jpg | | 0.00 | 0 | 20161215 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/2A/CvkBIlhSmryAZXITAG-zN3WQv4c789.jpg | | 9900.00 | 1 | 20161214 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/31/CvkBIVhRTrOALwG6AAE_csC3lvk695.jpg | | 4320.00 | 1 | 20161213 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/28/CvkBIlhQrzCAfApEAAFKbHqkH3w634.jpg | | 8760.00 | 2 | 20161212 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/26/CvkBIlhOqjeAO1BdAAGHdajOU2E697.jpg | | 213335.00 | 4 | 20161211 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/2D/CvkBIVhNYQSAfxXgAAHZL9a8Nrs596.jpg | | 47104.00 | 5 | 20161210 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/2C/CvkBIVhMsPSAAnrAAAETxX9fCuw946.jpg | | 6100.00 | 1 | 20161209 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/23/CvkBIlhLfXOAClJVAAFmuoqBI5o264.jpg | | 13515.00 | 2 | 20161208 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/21/CvkBIlhJZ06AbuaNAAGg7Bz3OsA569.jpg | | 26769.00 | 4 | 20161207 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/20/CvkBIlhIGgeAdNxuAAETxX9fCuw408.jpg | | 0.00 | 0 | 20161206 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/1E/CvkBIlhGxAuAfQr8AAFatVZ2sFk337.jpg | | 0.00 | 0 | 20161205 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/1D/CvkBIlhGKy-AU9guAAGm4jFhmoU601.jpg | | 20000.00 | 3 | 20161204 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/23/CvkBIVhEIDGAMPuIAAH6chL6Wo8684.jpg | | 20275.00 | 4 | 20161203 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/21/CvkBIVhCyrSAE-uGAAGf0CWFbZM991.jpg | | 3988.00 | 1 | 20161202 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/19/CvkBIlhCI7mAUN_9AAIsSLMhcns351.jpg | | 4460.00 | 1 | 20161201 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/17/CvkBIlhAKwmACroNAAGpJUqVqIA247.jpg | | 10498.00 | 2 | 20161130 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/16/CvkBIlg-3euAbsd5AAGr-r7GCH0254.jpg | | 11080.00 | 2 | 20161129 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/1C/CvkBIVg9i6WAD4Z0AAHLB1yISaQ864.jpg | | 6100.00 | 1 | 20161128 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/1B/CvkBIVg8OHGABTZOAAG1ZWoLoXY932.jpg | | 5580.00 | 1 | 20161127 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/19/CvkBIVg65aKAcRWWAAFnaqaodKs660.jpg | | 32630.00 | 2 | 20161126 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/18/CvkBIVg5kveALns0AAHLB1yISaQ850.jpg | | 9800.00 | 1 | 20161125 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/17/CvkBIVg4Qg2AMqoNAAH--He3hsg726.jpg | | 32500.00 | 2 | 20161124 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/16/CvkBIVg27_OAAV5OAAE8vRiZWHs684.jpg | | 2700.00 | 1 | 20161123 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/0E/CvkBIlg2T4OAL3t5AAFsAWaUI98731.jpg | | 4580.00 | 1 | 20161122 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/14/CvkBIVg0-UeAFDr_AAIBY_LNIxs656.jpg | | 14120.00 | 1 | 20161121 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/0B/CvkBIlgy_EeAaPdBAAHeyO5nxeo952.jpg | | 41510.00 | 2 | 20161120 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/12/CvkBIVgyYRKAZKi3AAGEp_IGjVM389.jpg | | 7800.00 | 2 | 20161118 | C91D5E7905BA44C8A14045C9C228157F|http://testxxx.cn/group1/M00/00/09/CvkBIlgw_viAFHiPAAH0MZwoiCE530.jpg | +-----------+-------+----------+------------------------------------------------------------------------------------------------------------+ 48 rows in set (0.75 sec) mysql>
Afficher les enregistrements de profil actuels, principalement pour obtenir la valeur Query_ID
mysql> show profiles; +----------+------------+------------------------------------------------------------------ -------------------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------+ | Query_ID | Duration | Query | +----------+------------+------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------ -------------------------------------------------------------------------------------------------------+ | 1 | 0.00009250 | show warning | | 2 | 0.00013125 | show warnings | | 3 | 0.00014375 | set profiling=1 | | 4 | 0.75458525 | SELECT SQL_NO_CACHE t1.amount, t1.count, t1.date , (SELECT (CONCAT(t2.APPROVE_ID,'|' ,t2.PATH)) AS RECEIPT FROM TB_BIS_MERCHANT_SETTLEMENT t2 WHERE t2.`MERCHANT_ID` = t1.`MERCHANT_ID` AND t2.`DATE`=t1.DATE AND t2.APPROVE_STATUS=5) AS r | +----------+------------+---------------------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------+ 4 rows in set, 1 warning (0.00 sec) mysql>
Afficher l'enregistrement de suivi du Query_ID 4 qui vient d'être exécuté
Vous peut le voir sur la base des résultats de l'analyse. Il s'avère qu'une grande quantité de données d'envoi est consommée et qu'elle est continue. Cela peut être considéré comme dû à une sous-requête, donc dans ce cas, la sous-requête n'est pas appropriée et l'efficacité est. trop faible. Alors, que faut-il utiliser pour l'éviter ?mysql> show profile for query 4; +--------------------+----------+ | Status | Duration | +--------------------+----------+ | executing | 0.000017 | | Sending data | 0.018048 | | executing | 0.000028 | | Sending data | 0.018125 | | executing | 0.000022 | | Sending data | 0.015749 | | executing | 0.000017 | | Sending data | 0.015633 | | executing | 0.000017 | | Sending data | 0.015382 | | executing | 0.000015 | | Sending data | 0.015707 | | executing | 0.000023 | | Sending data | 0.015890 | | executing | 0.000022 | | Sending data | 0.015908 | | executing | 0.000017 | | Sending data | 0.015761 | | executing | 0.000022 | | Sending data | 0.015542 | | executing | 0.000014 | | Sending data | 0.015561 | | executing | 0.000016 | | Sending data | 0.015546 | | executing | 0.000037 | | Sending data | 0.015555 | | executing | 0.000015 | | Sending data | 0.015779 | | executing | 0.000026 | | Sending data | 0.015815 | | executing | 0.000015 | | Sending data | 0.015468 | | executing | 0.000015 | | Sending data | 0.015457 | | executing | 0.000015 | | Sending data | 0.015457 | | executing | 0.000014 | | Sending data | 0.015500 | | executing | 0.000014 | | Sending data | 0.015557 | | executing | 0.000015 | | Sending data | 0.015537 | | executing | 0.000014 | | Sending data | 0.015395 | | executing | 0.000021 | | Sending data | 0.015416 | | executing | 0.000014 | | Sending data | 0.015416 | | executing | 0.000014 | | Sending data | 0.015399 | | executing | 0.000023 | | Sending data | 0.015407 | | executing | 0.000014 | | Sending data | 0.015585 | | executing | 0.000014 | | Sending data | 0.015385 | | executing | 0.000014 | | Sending data | 0.015412 | | executing | 0.000014 | | Sending data | 0.015408 | | executing | 0.000014 | | Sending data | 0.015753 | | executing | 0.000014 | | Sending data | 0.015376 | | executing | 0.000014 | | Sending data | 0.015416 | | executing | 0.000019 | | Sending data | 0.015368 | | executing | 0.000014 | | Sending data | 0.015481 | | executing | 0.000015 | | Sending data | 0.015619 | | executing | 0.000015 | | Sending data | 0.015662 | | executing | 0.000016 | | Sending data | 0.015574 | | executing | 0.000015 | | Sending data | 0.015566 | | executing | 0.000015 | | Sending data | 0.015488 | | executing | 0.000013 | | Sending data | 0.015493 | | executing | 0.000015 | | Sending data | 0.015386 | | executing | 0.000015 | | Sending data | 0.015485 | | executing | 0.000018 | | Sending data | 0.015760 | | executing | 0.000014 | | Sending data | 0.015386 | | executing | 0.000015 | | Sending data | 0.015418 | | executing | 0.000014 | | Sending data | 0.015458 | | end | 0.000016 | | query end | 0.000019 | | closing tables | 0.000018 | | freeing items | 0.000825 | | logging slow query | 0.000067 | | cleaning up | 0.000025 | +--------------------+----------+ 100 rows in set, 1 warning (0.00 sec) mysql>
Utilisez le groupe par jointure à gauche pour réécrire
Vous pouvez voir. que le temps d'exécution devient 0,15 seconde, ce qui améliore l'efficacité de 5 fois . En regardant l'analyse du suivi du profil, nous pouvons voir qu'il n'y a qu'une seule consommation de | Envoi de données | 0,148283 |, donc l'efficacité s'améliore très rapidement.mysql> SELECT SQL_NO_CACHE DISTINCT -> t1.amount, -> t1.count, -> t1.date, GROUP_CONCAT(CONCAT(t2.APPROVE_ID,'|' ,t2.PATH)) AS RECEIPT -> FROM -> TB_BIS_MERCHANT_TURNOVER t1 LEFT JOIN TB_BIS_MERCHANT_SETTLEMENT t2 ON t2. `MERCHANT_ID` = t1.`MERCHANT_ID` AND t2.`DATE`=t1.DATE AND t2.APPROVE_STATUS=5 -> WHERE t1.MERCHANT_ID='64884DE062BC11E682B00017FA000202' -> GROUP BY t1.amount, -> t1.count, -> t1.date -> ORDER BY t1.date DESC -> -> LIMIT 0,100; +-----------+-------+----------+------------------------------------------------------------------------------------------------------------+ | amount | count | date | RECEIPT | +-----------+-------+----------+------------------------------------------------------------------------------------------------------------+ | 15800.00 | 1 | 20170105 | 0DDFD555F93B45BEB0905B1E6DE89D29|http://testxxx.cn/group1/M00/00/49/CvkBIlhu-yqABqmAABYR7dHOmno819.jpg | | 1245.00 | 1 | 20170104 | 0DDFD555F93B45BEB0905B1E6DE89D29|http://testxxx.cn/group1/M00/00/4F/CvkBIVhtpSeAI_YHAADNjq7TPq8244.jpg | | 14766.00 | 4 | 20170103 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/45/CvkBIlhrrf6AQ5uIAAEobJv68FU398.jpg | | 32449.00 | 2 | 20170102 | 0DDFD555F93B45BEB0905B1E6DE89D29|http://testxxx.cn/group1/M00/00/4C/CvkBIVhrDguAfaMIABjKB9uvu04477.jpg | | 37246.00 | 5 | 20170101 | 0DDFD555F93B45BEB0905B1E6DE89D29|http://testxxx.cn/group1/M00/00/4A/CvkBIVhpCnGASEyLAAEu6l9SI0o812.jpg | | 105094.00 | 2 | 20161231 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/49/CvkBIVhnwp-ALIvWAAEAaGPayjg732.jpg | | 88032.00 | 3 | 20161230 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/47/CvkBIVhmaqSAHcEZAAFAyS8Zx8Q067.jpg | | 3845.00 | 1 | 20161229 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/3F/CvkBIlhl206AaS-FAAFMhvX8PYY578.jpg | | 2118.00 | 4 | 20161228 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/3D/CvkBIlhjxhyAMOfhAAD8wUzTUUY855.jpg | | 2980.00 | 1 | 20161227 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/3B/CvkBIlhicfCAFmwgAAE9ULPqEJ4030.jpg | | 1080.00 | 1 | 20161226 | 667E240C44B4469892C261CE9243A8C3|http://testxxx.cn/group1/M00/00/42/CvkBIVhhy6iAMm8tAAFHOT5zBiM875.jpg | | 2980.00 | 1 | 20161225 | 0DDFD555F93B45BEB0905B1E6DE89D29|http://testxxx.cn/group1/M00/00/40/CvkBIVhfzCWAdw2LAAFpDXmwio4327.jpg | | 10201.00 | 1 | 20161224 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/38/CvkBIlhfJfKAIoBiAADqgbF1pBo054.jpg | | 3003.00 | 4 | 20161223 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/3D/CvkBIVhdMHeAQi8cAAGAOQTgxLo422.jpg | | 2698.00 | 1 | 20161222 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/3C/CvkBIVhb2U2AXWRuAAEc4LIr2nc172.jpg | | 990.00 | 1 | 20161221 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/3B/CvkBIVhbM6aAGMQAAAEQ9ptn0FU333.jpg | | 1427.00 | 1 | 20161220 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/31/CvkBIlhZNJqAAsvWAAGuJ6g1pyU541.jpg | | 2465.00 | 1 | 20161219 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/30/CvkBIlhX4_mAfn-SAAEptH1Fyp8152.jpg | | 2360.00 | 1 | 20161218 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/2F/CvkBIlhWl_-AclhbAAGLv79hoh8428.jpg | | 3998.00 | 1 | 20161217 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/35/CvkBIVhVSLGAFct_AAFQRetyWnc285.jpg | | 0.00 | 0 | 20161216 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/2D/CvkBIlhU8g-AXywcAAGn1gdsQQc959.jpg | | 0.00 | 0 | 20161215 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/2A/CvkBIlhSmryAZXITAG-zN3WQv4c789.jpg | | 9900.00 | 1 | 20161214 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/31/CvkBIVhRTrOALwG6AAE_csC3lvk695.jpg | | 4320.00 | 1 | 20161213 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/28/CvkBIlhQrzCAfApEAAFKbHqkH3w634.jpg | | 8760.00 | 2 | 20161212 | EC481757CFDB445092D16D6B616350C8|http://testxxx.cn/group1/M00/00/26/CvkBIlhOqjeAO1BdAAGHdajOU2E697.jpg | | 213335.00 | 4 | 20161211 | 2154FDCDA51A4257811F1EA886AACD14|http://testxxx.cn/group1/M00/00/2D/CvkBIVhNYQSAfxXgAAHZL9a8Nrs596.jpg | | 47104.00 | 5 | 20161210 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/2C/CvkBIVhMsPSAAnrAAAETxX9fCuw946.jpg | | 6100.00 | 1 | 20161209 | 98FDB31FE4B04C21BC7EBE8A22981DA0|http://testxxx.cn/group1/M00/00/23/CvkBIlhLfXOAClJVAAFmuoqBI5o264.jpg | | 13515.00 | 2 | 20161208 | 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mysql> show profile for query 8; +-------------------------------+----------+ | Status | Duration | +-------------------------------+----------+ | starting | 0.000125 | | checking permissions | 0.000015 | | checking permissions | 0.000014 | | Opening tables | 0.000029 | | init | 0.000055 | | System lock | 0.000020 | | Waiting for query cache lock | 0.000013 | | System lock | 0.000050 | | optimizing | 0.000023 | | statistics | 0.000087 | | preparing | 0.000066 | | Creating tmp table | 0.000062 | | Creating tmp table | 0.000028 | | Sorting result | 0.000016 | | executing | 0.000012 | | Sending data | 0.148283 | | Creating sort index | 0.000342 | | Creating sort index | 0.000223 | | end | 0.000015 | | query end | 0.000046 | | removing tmp table | 0.000017 | | query end | 0.000012 | | removing tmp table | 0.000062 | | query end | 0.000015 | | closing tables | 0.000017 | | freeing items | 0.000019 | | removing tmp table | 0.000025 | | freeing items | 0.000016 | | Waiting for query cache lock | 0.000012 | | freeing items | 0.000915 | | Waiting for query cache lock | 0.000015 | | freeing items | 0.000011 | | storing result in query cache | 0.000013 | | cleaning up | 0.000024 | +-------------------------------+----------+ 34 rows in set, 1 warning (0.00 sec) mysql>
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