최근 하위 쿼리를 이용한 SQL 문 쿼리는 속도가 매우 느리고 성능에 심각한 영향을 미치므로 최적화가 필요합니다. 다음 글에서는 주로 다음 글을 소개합니다. MySQL프로파일을 이용해 슬로우 SQL 관련 정보를 분석해 보세요. 기사에 아주 자세하게 소개되어 있으니 필요하신 분들은 참고해보세요.
프로파일을 사용하여 느린 SQL 분석
mysql의 SQL 성능 분석기의 주요 목적은 전체 프로세스 동안 다양한 리소스의 사용량을 표시하는 것입니다. 잘못된 SQL의 성능 문제를 더 잘 보여줍니다. 최근에는 쿼리가 상대적으로 느린 SQL 문이 발생했는데 시간이 오래 걸리고 성능에 심각한 영향을 미치기 때문에 최적화가 필요했습니다. . 단일 테이블 쿼리 또는 레코드 하위 쿼리는 매우 빠릅니다.
프로필 열기
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>
프로필 추적 기록을 용이하게 하는 쿼리 실행
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>
주로 Query_ID 값을 얻기 위해 현재 프로필 기록 보기
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>
방금 실행한 Query_ID 4의 추적 기록을 보면
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>
그룹별 + 왼쪽 조인을 사용하여
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 | 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 (0.15 sec)
mysql>
확장 부분
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>
요약
위 내용은 느린 SQL 코드 예제를 분석하기 위해 프로필을 사용하는 MySQL에 대한 자세한 설명의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!