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  • [20170904]11Gr2 查询光标为什么不共享脚本.txt

    [20170904]11Gr2 查询光标为什么不共享脚本.txt

    --//参考链接下面的注解脚本:
    https://carlos-sierra.net/2017/09/01/poors-man-script-to-summarize-reasons-why-cursors-are-not-shared/

    --//做一个记录.

    SCOTT@book> @ &r/ver1
    PORT_STRING                    VERSION        BANNER
    ------------------------------ -------------- --------------------------------------------------------------------------------
    x86_64/Linux 2.4.xx            11.2.0.4.0     Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

    /* Formatted on 2017/9/4 9:54:31 (QP5 v5.252.13127.32867) */
      SELECT    'select reason_not_shared, count(*) cursors, count(distinct sql_id) sql_ids
    from v$sql_shared_cursor
    unpivot(val for reason_not_shared in(
    '
             || LISTAGG
                (
                      '  '
                   || LISTAGG (column_name, ',') WITHIN GROUP (ORDER BY column_id)
                  ,',
    '
                )
                WITHIN GROUP (ORDER BY line_no)
             || '
    ))
    where val = ''Y''
    group by reason_not_shared
    order by 2 desc, 3, 1;'
                sql_text
        FROM (SELECT column_name
                    ,column_id
                    ,CEIL (ROW_NUMBER () OVER (ORDER BY column_id) / 4) line_no
                FROM dba_tab_columns
               WHERE     owner = 'SYS'
                     AND table_name = 'V_$SQL_SHARED_CURSOR'
                     AND data_length = 1)
    GROUP BY line_no;

    --//生成的脚本如下:
    select reason_not_shared, count(*) cursors, count(distinct sql_id) sql_ids
    from v$sql_shared_cursor
    unpivot(val for reason_not_shared in(
      UNBOUND_CURSOR,SQL_TYPE_MISMATCH,OPTIMIZER_MISMATCH,OUTLINE_MISMATCH,
      STATS_ROW_MISMATCH,LITERAL_MISMATCH,FORCE_HARD_PARSE,EXPLAIN_PLAN_CURSOR,
      BUFFERED_DML_MISMATCH,PDML_ENV_MISMATCH,INST_DRTLD_MISMATCH,SLAVE_QC_MISMATCH,
      TYPECHECK_MISMATCH,AUTH_CHECK_MISMATCH,BIND_MISMATCH,DESCRIBE_MISMATCH,
      LANGUAGE_MISMATCH,TRANSLATION_MISMATCH,BIND_EQUIV_FAILURE,INSUFF_PRIVS,
      INSUFF_PRIVS_REM,REMOTE_TRANS_MISMATCH,LOGMINER_SESSION_MISMATCH,INCOMP_LTRL_MISMATCH,
      OVERLAP_TIME_MISMATCH,EDITION_MISMATCH,MV_QUERY_GEN_MISMATCH,USER_BIND_PEEK_MISMATCH,
      TYPCHK_DEP_MISMATCH,NO_TRIGGER_MISMATCH,FLASHBACK_CURSOR,ANYDATA_TRANSFORMATION,
      PDDL_ENV_MISMATCH,TOP_LEVEL_RPI_CURSOR,DIFFERENT_LONG_LENGTH,LOGICAL_STANDBY_APPLY,
      DIFF_CALL_DURN,BIND_UACS_DIFF,PLSQL_CMP_SWITCHS_DIFF,CURSOR_PARTS_MISMATCH,
      STB_OBJECT_MISMATCH,CROSSEDITION_TRIGGER_MISMATCH,PQ_SLAVE_MISMATCH,TOP_LEVEL_DDL_MISMATCH,
      MULTI_PX_MISMATCH,BIND_PEEKED_PQ_MISMATCH,MV_REWRITE_MISMATCH,ROLL_INVALID_MISMATCH,
      OPTIMIZER_MODE_MISMATCH,PX_MISMATCH,MV_STALEOBJ_MISMATCH,FLASHBACK_TABLE_MISMATCH,
      LITREP_COMP_MISMATCH,PLSQL_DEBUG,LOAD_OPTIMIZER_STATS,ACL_MISMATCH,
      FLASHBACK_ARCHIVE_MISMATCH,LOCK_USER_SCHEMA_FAILED,REMOTE_MAPPING_MISMATCH,LOAD_RUNTIME_HEAP_FAILED,
      HASH_MATCH_FAILED,PURGED_CURSOR,BIND_LENGTH_UPGRADEABLE,USE_FEEDBACK_STATS
    ))
    where val = 'Y'
    group by reason_not_shared
    order by 2 desc, 3, 1;

    --//输出例子:
    REASON_NOT_SHARED             CURSORS   SQL_IDS                               
    --------------------------------------------------
    LANGUAGE_MISMATCH             5928      3733                                  
    USE_FEEDBACK_STATS            3923      3305                                  
    BIND_LENGTH_UPGRADEABLE       1161      855                                   
    BIND_MISMATCH                 376       352                                   
    PURGED_CURSOR                 248       177                                   
    BIND_EQUIV_FAILURE            207       150                                   
    BIND_UACS_DIFF                120       120                                   
    LOAD_OPTIMIZER_STATS          88        78                                    
    USER_BIND_PEEK_MISMATCH       30        18                                    
    OPTIMIZER_MISMATCH            26        13                                    
    HASH_MATCH_FAILED             25        25                                    
    AUTH_CHECK_MISMATCH           23        15                                    
    OPTIMIZER_MODE_MISMATCH       18        14                                    
    TRANSLATION_MISMATCH          16        11                                    
    TOP_LEVEL_RPI_CURSOR          11        9                                     
    INSUFF_PRIVS_REM              7         4                                     
    INCOMP_LTRL_MISMATCH          4         4                                     
    PLSQL_CMP_SWITCHS_DIFF        4         4                                     
    INST_DRTLD_MISMATCH           3         3                                     
    INSUFF_PRIVS                  2         2                                     
    TOP_LEVEL_DDL_MISMATCH        2         2                                     
    MULTI_PX_MISMATCH             1         1                                     
    PQ_SLAVE_MISMATCH             1         1                                     
    ROLL_INVALID_MISMATCH         1         1                                     

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  • 原文地址:https://www.cnblogs.com/lfree/p/7472323.html
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