{"id":431,"date":"2014-07-15T14:53:12","date_gmt":"2014-07-15T06:53:12","guid":{"rendered":"http:\/\/www.royalwzy.com\/?p=431"},"modified":"2014-08-15T14:59:17","modified_gmt":"2014-08-15T06:59:17","slug":"%e6%80%a7%e8%83%bd%e8%b0%83%e4%bc%98%e5%b7%a5%e5%85%b704-sqlt-diagnostic-tool","status":"publish","type":"post","link":"http:\/\/www.royalwzy.com\/?p=431","title":{"rendered":"\u6027\u80fd\u8c03\u4f18\u5de5\u517704–SQLT Diagnostic Tool"},"content":{"rendered":"
\n
SQLT Diagnostic Tool<\/div>\n
1.SQLT\u4ecb\u7ecd:SQLTXPLAIN, also known as SQLT, is a tool provided by Oracle Server Technologies Center of Expertise – ST CoE. SQLT inputs one SQL statement and outputs a set of diagnostics files. These files are commonly used to diagnose SQL statements performing poorly. SQLT connects to the database and collects execution plans, Cost-based Optimizer CBO statistics, schema objects metadata, performance statistics, configuration parameters, and similar elements that influence the performance of the SQL being analyzed.<\/div>\n
2.\u5b89\u5168\u6a21\u5f0f:SQLT\u5728\u5b89\u88c5\u7684\u8fc7\u7a0b\u4e2d\u4f1a\u521b\u5efa\u4e24\u4e2a\u7528\u6237\u548c\u4e00\u4e2a\u89d2\u8272,\u8fd9\u4e9b\u7528\u6237\u548c\u89d2\u8272\u7684\u540d\u5b57\u90fd\u662f\u56fa\u5b9a\u7684;<\/div>\n
\n
\u00a0 \u00a0 \u00a01.SQLTXPLAIN\u7528\u6237:\u7528\u6765\u7ba1\u7406SQLT repository,SQLT\u7684\u4f7f\u7528\u8005\u6bcf\u6b21\u4f7f\u7528SQLT\u63d0\u4f9b\u7684\u4e3b\u8981\u65b9\u6cd5\u65f6\u90fd\u8981\u63d0\u4f9bSQLTXPLAIN\u7684\u5bc6\u7801;SQLTXPLAIN\u7528\u6237\u88ab\u8d4b\u4e88\u4e86CREATE SESSION,CREATE TABLE\u7cfb\u7edf\u6743\u9650;
\n2.SQLTXADMIN\u7528\u6237:\u7528\u6765\u7ba1\u7406SQLT\u5305\u542b\u7684PL\/SQL\u7a0b\u5e8f\u5305\u4ee5\u53ca\u89c6\u56fe,SQLTXADMIN\u7528\u6237\u5904\u4e8e\u9501\u5b9a\u72b6\u6001\u5e76\u4e14\u7531\u4e00\u4e2a\u968f\u673a\u4ea7\u751f\u7684\u5bc6\u7801\u4fdd\u62a4;SQLTXADMIN\u7528\u6237\u88ab\u8d4b\u4e88\u4e86ADMINISTER SQL MANAGEMENT OBJECT,ADMINISTER SQL TUNING SET,ADVISOR,ALTER SESSION,ANALYZE ANY,SELECT ANY DICTIONARY,SELECT_CATALOG_ROLE\u7cfb\u7edf\u6743\u9650;
\n3.SQLT_USER_ROLE\u89d2\u8272:\u6240\u6709SQLT\u7684\u4f7f\u7528\u8005\u5728\u4f7f\u7528SQLT\u63d0\u4f9b\u7684\u4e3b\u8981\u65b9\u6cd5\u4e4b\u524d\u5fc5\u987b\u88ab\u8d4b\u4e88\u8fd9\u4e2a\u89d2\u8272;SQLT_USER_ROLE\u89d2\u8272\u88ab\u8d4b\u4e88\u4e86ADVISOR,SELECT_CATALOG_ROLE\u7cfb\u7edf\u6743\u9650;<\/div>\n
\u00a0 \u00a0 \u00a04.TIPS:12c\u5728\u7f3a\u7701\u60c5\u51b5\u4e0bSYS\u7528\u6237\u4e0d\u80fd\u4f5c\u4e3aSQLT\u7684\u7528\u6237,\u56e0\u4e3aPL\/SQL\u5b89\u5168\u6a21\u578b\u6539\u53d8\u7684\u539f\u56e0,\u9700\u8981\u5355\u72ec\u5bf9SQLTADMIN\u6388\u6743(GRANT INHERIT PRIVILEGES ON USER SYS TO SQLTXADMIN);<\/div>\n
3.\u5b89\u88c5:<\/div>\n
\u00a0 \u00a0 \u00a01.\u4e0b\u8f7d\u5e76\u89e3\u538b\u5230\u76f8\u5e94\u7684\u76ee\u5f55;(\u53ef\u4ee5\u67e5\u770b\u76ee\u5f55\u4e0b\u7684sqlt_instructions.html\u5b89\u88c5\u6587\u6863)<\/div>\n
\u00a0 \u00a0 \u00a02.\u5b89\u88c5:conn \/ as sysdba;\u00a0SQL> @\/tools\/sqlt\/install\/sqcreate.sql;\u9700\u8981\u63d0\u4f9b\u4ee5\u4e0b\u4fe1\u606f:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1.\u8fde\u63a5\u6807\u8bc6\u7b26(\u53ef\u9009,\u5f53\u5b89\u88c5\u5728\u4e00\u4e2aPDB\u4e0a\u65f6\u662f\u5fc5\u987b\u7684):\u4e00\u822c\u4e0d\u8f93\u5165\u76f4\u63a5\u56de\u8f66;<\/div>\n

2.SQLTXPLAIN\u5bc6\u7801;
\n3.SQLTXPLAIN\u9ed8\u8ba4\u8868\u7a7a\u95f4:\u5b83\u5fc5\u987b\u5177\u670950MB\u4ee5\u4e0a\u7684\u53ef\u7528\u7a7a\u95f4;
\n4.SQLTXPLAIN\u4e34\u65f6\u8868\u7a7a\u95f4;
\n5.\u5e94\u7528\u7a0b\u5e8f\u7528\u6237(\u53ef\u9009):\u6307\u5b9a\u53d1\u51fa\u8981\u5206\u6790SQL\u8bed\u53e5\u7684\u7528\u6237(EBS\u4e2d\u4e3aAPPS,Siebel\u4e2d\u4e3aSIEBEL,PeopleSoft\u4e2d\u4e3aSYSADM),\u4e5f\u53ef\u4ee5\u5b89\u88c5\u4e4b\u540e\u518d\u6dfb\u52a0\u7528\u6237,\u5fc5\u987b\u6388\u4e88\u5176SQLT_USER_ROLE\u89d2\u8272;
\n6.\u6388\u6743\u7684Oracle Pack(T,D,N):T\u8868\u793aOracle Tuning,D\u8868\u793aOracle Diagnostic,\u6216N\u8868\u793aNone;\u5982\u679c\u9009\u62e9T\u6216D,SQLT\u53ef\u4ee5\u5728\u5b83\u751f\u6210\u7684\u8bca\u65ad\u6587\u4ef6\u4e2d\u5305\u542b\u6388\u6743\u7684\u5185\u5bb9;\u9ed8\u8ba4\u503c\u4e3aT,\u5982\u679c\u9009\u62e9N,SQLT\u5c06\u53ea\u5b89\u88c5\u9650\u5b9a\u7684\u529f\u80fd;<\/p>\n

\u00a0 \u00a0 \u00a03.\u5378\u8f7d:conn \/ as sysdba;\u00a0SQL>\u00a0@\/path\/sqlt\/install\/sqdrop.sql;<\/a><\/div>\n
\u00a0 \u00a0 \u00a04.\u5347\u7ea7:\u53ea\u9700\u8981\u6267\u884c\u5b89\u88c5\u7684\u8fc7\u7a0b\u5373\u53ef,\u5982\u679c\u5347\u7ea7\u5931\u8d25,\u5219\u9700\u8981\u6267\u884c\u5378\u8f7d\u7136\u540e\u5b89\u88c5;<\/div>\n
\u00a0 \u00a0 \u00a05.tips:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1.\u5982\u679c\u5b89\u88c5\u65f6\u6ca1\u6709\u8bbe\u7f6e\u8fde\u63a5\u6807\u793a\u7b26,\u90a3\u4e48\u53ef\u4ee5\u4e4b\u540e\u81ea\u5df1\u8bbe\u7f6e:EXEC sqltxadmin.sqlt$a.set_sess_param(‘connect_identifier’, ‘@network_name’);<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 2.\u5982\u679c\u5b89\u88c5\u65f6\u6ca1\u6709\u6307\u5b9a\u6dfb\u52a0\u7528\u6237,\u90a3\u4e48\u53ef\u4ee5CREATE USER sqlt;GRANT sqlt_user_role TO sqlt;<\/div>\n
4.\u4e3b\u8981\u65b9\u6cd5:<\/div>\n
\u00a0 \u00a0 \u00a01.XTRACT\u65b9\u6cd5:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1.\u5982\u679c\u77e5\u9053\u5f85\u5206\u6790SQL\u7684SQL_ID\u6216HASH_VALUE,\u53ef\u4ee5\u4f7f\u7528\u6b64\u65b9\u6cd5,\u5426\u5219\u4f7f\u7528XECUTE;\u53ef\u4ee5\u5728AWR report\u4e2d\u627e\u5230SQL_ID,\u5728SQL trace\u4e2d\u627e\u5230HASH_VALUE(\u5728SQL\u6587\u672c\u4e0a\u9762,\u901a\u8fc7”hv=”\u6807\u8bb0\u8fdb\u884c\u6807\u8bc6);
\n2.\u5982\u679c\u5bf9SQL\u8fdb\u884c\u786c\u5206\u6790\u65f6\u5c06\u53c2\u6570STATISTICS_LEVEL\u8bbe\u7f6e\u4e3aALL,\u5c06\u53ef\u4ee5\u5f97\u5230\u91cd\u8981\u7684\u6027\u80fd\u7edf\u8ba1\u4fe1\u606f(\u5982\u6bcf\u6b65\u64cd\u4f5c\u7684\u5b9e\u9645\u884c\u6570);\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5728SQL\u4e2d\u5305\u62ec\u4ee5\u4e0bCBO\u63d0\u793a\u6765\u751f\u6210\u540c\u6837\u6709\u7528\u7684\u6027\u80fd\u7edf\u8ba1\u4fe1\u606f:\/*+ GATHER_PLAN_STATISTICS *\/;\u572811g\u4e2d,\u60a8\u53ef\u4ee5\u5728SQL\u4e2d\u5305\u542b\u4ee5\u4e0bCBO\u63d0\u793a\u4ee5\u83b7\u5f97\u589e\u5f3a\u7684\u8bca\u65ad\u4fe1\u606f:\/*+ GATHER_PLAN_STATISTICS MONITOR *\/;
\n3.\u4f7f\u7528\u65b9\u6cd5:SQL> @\/path\/sqlt\/run\/sqltxtract.sql [SQL_ID]|[HASH_VALUE] [sqltxplain_password];<\/div>\n
\u00a0 \u00a0 \u00a02.XECUTE\u65b9\u6cd5:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1.\u4e0eXTRACT\u65b9\u6cd5\u76f8\u6bd4,\u6b64\u65b9\u6cd5\u63d0\u4f9b\u7684\u4fe1\u606f\u66f4\u4e3a\u8be6\u7ec6;\u6b63\u5982\u540d\u79f0XECUTE\u6240\u6307\u793a\u7684,\u5b83\u5c06\u6267\u884c\u6b63\u5728\u5206\u6790\u7684SQL,\u7136\u540e\u751f\u6210\u4e00\u7ec4\u8bca\u65ad\u6587\u4ef6;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 2.\u5b83\u7684\u4e3b\u8981\u7f3a\u70b9\u662f\u5982\u679c\u6b63\u5728\u5206\u6790\u7684SQL\u9700\u8981\u5f88\u957f\u65f6\u95f4\u6765\u6267\u884c,\u90a3\u4e48\u8be5\u65b9\u6cd5\u4e5f\u8981\u82b1\u8d39\u5f88\u957f\u7684\u65f6\u95f4;\u6839\u636e\u7ecf\u9a8c\u6cd5\u5219,\u4ec5\u5f53SQL\u6267\u884c\u5c11\u4e8e1\u5c0f\u65f6\u7684\u60c5\u51b5\u4e0b,\u624d\u8003\u8651\u4f7f\u7528\u6b64\u65b9\u6cd5,\u5426\u5219\u8bf7\u4f7f\u7528XTRACT;
\n3.\u4f7f\u7528\u6b64XECUTE\u65b9\u6cd5\u4e4b\u524d,\u5fc5\u987b\u521b\u5efa\u4e00\u4e2a\u5305\u542bSQL\u6587\u672c\u7684\u6587\u672c\u6587\u4ef6;\u5982\u679cSQL\u5305\u62ec\u7ed1\u5b9a\u53d8\u91cf,\u5219\u60a8\u7684\u6587\u4ef6\u5fc5\u987b\u5305\u542b\u7ed1\u5b9a\u53d8\u91cf\u58f0\u660e\u548c\u8d4b\u503c;\u4ee5sqlt\/input\/sample\/script1.sql\u4e3a\u4f8b;\u60a8\u7684SQL\u5e94\u8be5\u5305\u542b\u6807\u8bb0\/* ^^unique_id *\/;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 4.\u4f7f\u7528\u65b9\u6cd5:SQL> @\/path\/sqlt\/run\/sqltxecute.sql \/path\/scriptname [sqltxplain_password];<\/div>\n
\u00a0 \u00a0 \u00a03.XTRXEC\u65b9\u6cd5:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1.\u8be5\u65b9\u6cd5\u5408\u5e76\u4e86XTRACT\u548cXECUTE\u7684\u529f\u80fd;\u5b9e\u9645\u4e0a,XTRXEC\u8fde\u7eed\u6267\u884c\u4e86\u8fd9\u4e24\u79cd\u65b9\u6cd5;\u9488\u5bf9\u6240\u8bf7\u6c42SQL\u8bed\u53e5\u627e\u5230\u7684\u5f00\u9500\u8f83\u5927\u7684\u8ba1\u5212,XTRACT\u9636\u6bb5\u5c06\u751f\u6210\u4e00\u4e2a\u5305\u542b\u63d0\u53d6\u7684SQL\u4ee5\u53ca\u7ed1\u5b9a\u58f0\u660e\u548c\u8d4b\u503c\u7684\u811a\u672c;\u7136\u540e,XTRXEC\u4f7f\u7528\u7b2c\u4e00\u9636\u6bb5\u521b\u5efa\u7684\u811a\u672c\u6267\u884cXECUTE\u9636\u6bb5;
\n2.SQLT\u6839\u636e\u5728\u5185\u5b58\u4e2d\u751f\u6210\u5f00\u9500\u6700\u5927\u7684\u6267\u884c\u8ba1\u5212\u65f6\u7aa5\u89c6\u5230\u7684\u503c,\u521b\u5efa\u811a\u672c\u7684\u7ed1\u5b9a\u53d8\u91cf\u7684\u4ee5\u4f9bXTRACT\u4f7f\u7528;\u5224\u65ad\u8ba1\u5212\u7684\u5f00\u9500\u5927\u5c0f\u7684\u6807\u51c6\u662f\u57fa\u4e8e\u8fd9\u4e2a\u8ba1\u5212\u7684\u5e73\u5747\u6267\u884c\u65f6\u95f4;
\n3.\u5982\u679cXTRXEC\u4ec5\u6267\u884c\u4e86\u7b2c\u4e00\u4e2a\u9636\u6bb5(XTRACT)\u540e\u5c31\u8f93\u51fa\u9519\u8bef,\u60a8\u53ef\u80fd\u9700\u8981\u68c0\u67e5\u5728\u7b2c\u4e8c\u9636\u6bb5(XECUTE)\u4f7f\u7528\u7684\u811a\u672c\u5e76\u76f8\u5e94\u8c03\u6574\u7ed1\u5b9a\u53d8\u91cf;\u4f7f\u7528\u4e0d\u5e38\u7528\u6570\u636e\u7c7b\u578b\u65f6\u5c24\u5176\u9700\u8981\u8fdb\u884c\u8c03\u6574;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 4.\u4f7f\u7528\u65b9\u6cd5:SQL> @\/path\/sqlt\/run\/sqltxtrxec.sql [SQL_ID]|[HASH_VALUE] [sqltxplain_password];<\/div>\n
\u00a0 \u00a0 \u00a04.XTRSBY\u65b9\u6cd5:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1.\u5982\u679c\u9700\u8981\u5206\u6790\u5728DataGuard\u6216\u5907\u7528\u53ea\u8bfb\u6570\u636e\u5e93\u4e0a\u6267\u884c\u7684SQL,\u8bf7\u4f7f\u7528\u8be5\u65b9\u6cd5;\u60a8\u9700\u8981\u77e5\u9053\u8981\u5206\u6790\u7684SQL\u7684SQL_ID\u6216HASH_VALUE;
\n2.\u5728\u4e3b\u5e93\u4e0a\u521b\u5efa\u4e00\u4e2a\u5230\u5907\u5e93\u7684database link,\u8fde\u63a5\u5230\u7684\u7528\u6237\u9700\u8981\u6709\u8bbf\u95ee\u6570\u636e\u5b57\u5178\u7684\u6743\u9650,\u901a\u5e38\u90fd\u662f\u4f7f\u7528\u6709DBA\u6743\u9650\u7684\u7528\u6237;
\n3.\u5982\u679c\u5bf9\u53ea\u8bfb\u6570\u636e\u5e93\u4e2d\u7684SQL\u8fdb\u884c\u786c\u5206\u6790\u65f6\u5c06\u53c2\u6570STATISTICS_LEVEL\u8bbe\u7f6e\u4e3aALL,\u5c06\u53ef\u4ee5\u5f97\u5230\u91cd\u8981\u7684\u6027\u80fd\u7edf\u8ba1\u4fe1\u606f(\u5982\u6bcf\u4e2a\u6267\u884c\u8ba1\u5212\u64cd\u4f5c\u7684\u5b9e\u9645\u884c\u6570);\u60a8\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5728SQL\u4e2d\u5305\u62ec\u4ee5\u4e0bCBO\u63d0\u793a\u6765\u751f\u6210\u540c\u6837\u6709\u7528\u7684\u6027\u80fd\u7edf\u8ba1\u4fe1\u606f:\/*+ GATHER_PLAN_STATISTICS *\/;\u572811g\u4e2d,\u60a8\u53ef\u4ee5\u5728SQL\u4e2d\u5305\u542b\u4ee5\u4e0bCBO\u63d0\u793a\u4ee5\u83b7\u5f97\u6539\u8fdb\u7684\u8bca\u65ad\u4fe1\u606f:\/*+ GATHER_PLAN_STATISTICS MONITOR *\/;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 4.\u4f7f\u7528\u65b9\u6cd5:SQL> @\/path\/sqlt\/run\/sqltxtrsby.sql [SQL_ID]|[HASH_VALUE] [sqltxplain_password] [DB_LINK];<\/div>\n
\u00a0 \u00a0 \u00a05.XPLAIN\u65b9\u6cd5:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1.\u8be5\u65b9\u6cd5\u662f\u57fa\u4e8eEXPLAIN PLAN FOR\u547d\u4ee4\u6267\u884c\u7684,\u56e0\u6b64\u5b83\u5c06\u65e0\u89c6\u60a8\u7684SQL\u8bed\u53e5\u5f15\u7528\u7684\u7ed1\u5b9a\u53d8\u91cf;\u4ec5\u5f53\u65e0\u6cd5\u4f7f\u7528XTRACT\u6216XECUTE\u65f6\u624d\u4f7f\u7528\u8be5\u65b9\u6cd5;
\n2.\u4f7f\u7528\u6b64XPLAIN\u65b9\u6cd5\u4e4b\u524d,\u5fc5\u987b\u521b\u5efa\u4e00\u4e2a\u5305\u542bSQL\u6587\u672c\u7684\u6587\u672c\u6587\u4ef6;\u5982\u679cSQL\u5305\u62ec\u7ed1\u5b9a\u53d8\u91cf,\u60a8\u6709\u4e24\u4e2a\u9009\u62e9:\u4fdd\u6301SQL\u6587\u672c”\u4e0d\u53d8”,\u6216\u8c28\u614e\u4f7f\u7528\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u5b57\u9762\u503c\u66ff\u6362\u8be5\u7ed1\u5b9a;\u4ee5sqlt\/input\/sample\/sql1.sql\u4e3a\u4f8b;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 3.\u4f7f\u7528\u65b9\u6cd5:SQL> @\/path\/sqlt\/run\/sqltxplain.sql \/path\/scriptname [sqltxplain_password];<\/div>\n
\u00a0 \u00a0 \u00a06.XPREXT\u65b9\u6cd5:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1.\u5047\u5982\u60a8\u60f3\u4f7f\u7528XTRACT\u540c\u65f6\u5e0c\u671b\u7981\u7528\u4e00\u4e9bSQLT\u7684\u7279\u6027\u4f7f\u4e4b\u6267\u884c\u66f4\u5feb,\u8bf7\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5;\u811a\u672csqlt\/run\/sqltcommon11.sql\u663e\u793a\u4e86\u54ea\u4e9b\u7279\u6027\u88ab\u7981\u7528;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 2.\u4f7f\u7528\u65b9\u6cd5:SQL> @\/path\/sqlt\/run\/sqltxprext.sql [SQL_ID]|[HASH_VALUE] [sqltxplain_password];<\/div>\n
\u00a0 \u00a0 \u00a07.XPREXC\u65b9\u6cd5:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1.\u5047\u5982\u60a8\u60f3\u4f7f\u7528XECUTE\u540c\u65f6\u5e0c\u671b\u7981\u7528\u4e00\u4e9bSQLT\u7684\u7279\u6027\u4f7f\u4e4b\u6267\u884c\u66f4\u5feb,\u8bf7\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5;\u811a\u672csqlt\/run\/sqltcommon11.sql\u663e\u793a\u4e86\u54ea\u4e9b\u7279\u6027\u88ab\u7981\u7528;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 2.\u4f7f\u7528\u65b9\u6cd5:SQL> @\/path\/sqlt\/run\/sqltxprexc.sql \/path\/scriptname [sqltxplain_password];<\/div>\n
\u00a0 \u00a0 \u00a08.TIPS:<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 1.XTRACT,XECUTE,XTRXEC,XTRSBY,XPREXT\u548cXPREXC\u5904\u7406\u7ed1\u5b9a\u53d8\u91cf\u548c\u4f1a\u505abind peeking(\u7ed1\u5b9a\u53d8\u91cf\u7aa5\u89c6),\u4f46\u662fXPLAIN\u4e0d\u4f1a;\u8fd9\u662f\u56e0\u4e3aXPLAIN\u662f\u57fa\u4e8eEXPLAIN PLAN FOR\u547d\u4ee4\u6267\u884c\u7684,\u8be5\u547d\u4ee4\u4e0d\u505abind peeking;\u56e0\u6b64,\u5982\u679c\u53ef\u80fd\u8bf7\u907f\u514d\u4f7f\u7528XPLAIN;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 2.\u9664\u4e86XPLAIN\u7684bind peeking\u9650\u5236\u5916,\u6240\u6709\u8fd97\u79cd\u4e3b\u8981\u65b9\u6cd5\u90fd\u53ef\u4ee5\u63d0\u4f9b\u8db3\u591f\u7684\u8bca\u65ad\u8be6\u7ec6\u4fe1\u606f,\u5bf9\u6027\u80fd\u8f83\u5dee\u6216\u4ea7\u751f\u9519\u8bef\u7ed3\u679c\u96c6\u7684SQL\u8fdb\u884c\u521d\u6b65\u8bc4\u4f30;\u5982\u679c\u8be5SQL\u4ecd\u4f4d\u4e8e\u5185\u5b58\u4e2d\u6216\u8005AWR\u4e2d,\u8bf7\u4f7f\u7528XTRACT\u6216XTRXEC,\u5176\u4ed6\u60c5\u51b5\u8bf7\u4f7f\u7528XECUTE;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 3.\u5bf9\u4e8eDataGuard\u6216\u5907\u7528\u53ea\u8bfb\u6570\u636e\u5e93,\u8bf7\u4f7f\u7528XTRSBY;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 4.\u4ec5\u5f53\u5176\u4ed6\u65b9\u6cd5\u90fd\u4e0d\u53ef\u884c\u65f6,\u518d\u8003\u8651\u4f7f\u7528XPLAIN;<\/div>\n
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 5.XPREXT\u548cXPREXC\u662f\u7c7b\u4f3c\u4e8eXTRACT\u548cXECUTE,\u4f46\u4e3a\u4e86\u63d0\u9ad8SQLT\u7684\u6027\u80fd\u5b83\u4eec\u7981\u4e86\u4e00\u4e9bSQLT\u7684\u7279\u6027;<\/div>\n
5.PROFILE\u65b9\u6cd5:<\/div>\n
\u00a0 \u00a0 \u00a01.\u5f53\u6027\u80fd\u8f83\u5dee\u7684SQL\u8bed\u53e5\u6b63\u597d\u6709\u5df2\u77e5\u7684\u66f4\u597d\u7684\u6267\u884c\u8ba1\u5212\u65f6,\u572810g\u4f7f\u7528\u8be5PROFILE\u65b9\u6cd5\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u5feb\u901f\u4fee\u590d;<\/div>\n
\u00a0 \u00a0 \u00a02.\u8fd9\u4e2a\u66f4\u597d\u7684\u6267\u884c\u8ba1\u5212\u53ef\u4ee5\u4f4d\u4e8e\u76f8\u540c\u6216\u4e0d\u540c\u7cfb\u7edf\u4e2d\u7684\u5185\u5b58\u4e2d,\u6216\u8005\u4f4d\u4e8e\u76f8\u540c\u6216\u4e0d\u540c\u7cfb\u7edf\u7684AWR\u4e2d;\u6362\u53e5\u8bdd\u8bf4,\u5982\u679c\u6709\u66f4\u597d\u7684\u8ba1\u5212,\u8be5\u65b9\u6cd5\u5141\u8bb8\u4f7f\u7528\u81ea\u5b9a\u4e49SQL Profile “\u56fa\u5b9a”\u8be5\u8ba1\u5212;\u4f7f\u7528\u8be5\u65b9\u6cd5\u4e4b\u524d,\u5fc5\u987b\u5bf9\u60a8\u8981\u4e3a\u5176\u63d0\u53d6\u548c\u56fa\u5b9a\u6b64\u8ba1\u5212\u7684SQL\u4f7f\u7528\u4e3b\u8981\u65b9\u6cd5\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a;<\/div>\n
\u00a0 \u00a0 \u00a03.\u572811g\u6216\u66f4\u9ad8\u7684\u7248\u672c\u4f60\u53ef\u4ee5\u4f7f\u7528SQL Plan Management(SPM)\u6765\u4ee3\u66ff\u8fd9\u4e2a\u65b9\u6cd5;<\/div>\n
6.\u53ef\u4ee5\u67e5\u770b\u751f\u6210\u6587\u4ef6\u4e2d\u7684html\u62a5\u544a;<\/div>\n
7.\u76f8\u5173\u6587\u6863:SQLT Diagnostic Tool (Doc ID 215187.1),SQLT \u4f7f\u7528\u6307\u5357 (Doc ID 1677588.1(CHN),Doc ID 1614107.1(EN));<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

SQLT Diagnostic Tool 1.SQLT\u4ecb\u7ecd:SQLTXPLAIN, also known as […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[34,8],"class_list":["post-431","post","type-post","status-publish","format-standard","hentry","category-oracle","tag-oracle","tag-performance"],"_links":{"self":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts\/431","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=431"}],"version-history":[{"count":0,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=\/wp\/v2\/posts\/431\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=431"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=431"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.royalwzy.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=431"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}