[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