ORA-7445(qerixGetKey)錯誤
執行並行查詢時碰到的問題。
錯誤資訊如下：
Wed Sep 28 18:03:47 2011
Errors in file /home/oracle/admin/ARIC/bdump/aric_p001_8093.trc:
ORA-07445: exception encountered: core dump [SIGSEGV] [Address not mapped to
object] [21] [] [] []
Wed Sep 28 18:03:47 2011
Errors in file /home/oracle/admin/ARIC/bdump/aric_p000_8091.trc:
ORA-07445: exception encountered: core dump [SIGSEGV] [Address not mapped to
object] [21] [] [] []
對應的TRACE檔案資訊如下：
*** 2011-09-28 18:03:47.537
*** SERVICE NAME:(SYS$USERS) 2011-09-28 18:03:47.530
*** SESSION ID:(82.818) 2011-09-28 18:03:47.530
Exception signal: 11 (SIGSEGV), code: 1 (Address not mapped to object), addr:
0x15
*** 2011-09-28 18:03:47.537
ksedmp: internal or fatal error
ORA-07445: exception encountered: core dump [SIGSEGV] [Address not mapped to
object] [21] [] [] []
Current SQL statement for this session:
SELECT /*+parallel (D_ITEMS_SCD,2)*/
( D_STR.ID_STR )||' / '||( D_STR.DS_STR_CN
),
.
.
.
D_STR_ITEMS_CUR.LAST_RECPT_DATE
FROM
D_STR,
D_DIV_SCD,
D_SEC_SCD,
D_GRP_SCD,
D_SGR_SCD,
D_ITEMS_SCD,
D_STR_ITEMS_CUR
WHERE
(
D_DIV_SCD.SID_DIV_H=D_SEC_SCD.SID_DIV_H
)
.
.
.
)
----- Call Stack Trace -----
calling call entry argument values in hex
location type point
(? means dubious
value)
-------------------- -------- -------------------- ----------------------------
ksedst()+23 ? 0000000000000001 0017B341C 000000000 0062E5A60
000000000
ksedmp()+636 ? 0000000000000001 0017B1EB1 000000000 00000000B
000000000
ssexhd()+729 ? 0000000000000001 000E90E7E 000000000 0062E5B90
000000000
sigsetjmp()+25 ? 0000000000000001 0FC7C00B6 0FFFFFD7F 0062E5B50
000000000
call_user_handler() ? 0000000000000001 0FC7B53A2 0FFFFFD7F 0062E5EF0
+589
000000000
sigacthandler()+163 ? 0000000000000001 0FC7B5588 0FFFFFD7F 0FDDFB2F0
0FFFFFD7F
qerixGetKey()+922 ? 0000000000000001 0FFFFFFFF 0FFFFFFFF 00000000B
000000000
qerbxStart()+1858 ? 0000000000000001 0033E49D7 000000000 0FC5A2930
0FFFFFD7F
qerbtStart()+800 ? 0000000000000001 0033DE2BD 000000000 005414760
000000000
qergiStart()+833 ? 0000000000000001 00347718E 000000000 0060B9478
000000000
qerjoFetch()+668 ? 0000000000000001 0033BE169 000000000 000007FFF
000000000
qerpfFetch()+484 ? 0000000000000001 00347F491 000000000 088439128
000000003
qertbFetchByRowID() ? 0000000000000001 0033C4451 000000000 088439128
+660
000000003
.
.
.
============
Plan Table
============
---------------------------------------------------------------------------+----------------
| Id | Operation | Name | Rows | Cost
|
---------------------------------------------------------------------------+----------------
| 0 | SELECT STATEMENT | | |
68K |
| 1 |
PX COORDINATOR
| |
| |
| 2 |
PX SEND QC (RANDOM)
| :TQ10003 | 2497 |
68K |
| 3 |
HASH JOIN
| | 2497 |
68K |
| 4 | BUFFER SORT | | |
|
| 5 | PX RECEIVE | | 1 |
4 |
| 6 | PX SEND BROADCAST | :TQ10000 | 1 |
4 |
| 7 | TABLE ACCESS FULL | D_STR | 1 |
4 |
| 8 | HASH JOIN | | 236K |
68K |
| 9 | TABLE ACCESS BY INDEX ROWID | D_ITEMS_SCD |
1377 | 10K |
| 10 | NESTED LOOPS | | 42K |
10K |
| 11 | BUFFER SORT | | |
|
| 12 | PX RECEIVE | | |
|
| 13 | PX SEND BROADCAST | :TQ10001 | |
|
| 14 | HASH JOIN | | 32 |
20 |
| 15 | HASH JOIN | | 4 |
10 |
| 16 | MERGE JOIN | | 1 |
6 |
| 17 | TABLE ACCESS BY INDEX ROWID |
D_DIV_SCD | 1 |
2 |
| 18 | INDEX FULL SCAN | PK_D_DIV_SCD | 8 |
1 |
| 19 | SORT JOIN | | 52 |
4 |
| 20 | TABLE ACCESS FULL | D_SEC_SCD | 52
| 3 |
| 21 | TABLE ACCESS FULL | D_GRP_SCD | 489 |
3 |
| 22 | TABLE ACCESS FULL | D_SGR_SCD | 3752 |
10 |
| 23 | PX BLOCK ITERATOR | | |
|
| 24 | BITMAP CONVERSION TO ROWIDS | | |
|
| 25 | BITMAP INDEX SINGLE VALUE | BIX_D_ITEMS_SCD_SID_SGR_H| |
|
| 26 | BUFFER SORT | | |
|
| 27 | PX RECEIVE | | 9548K | 58K |
| 28 | PX SEND BROADCAST | :TQ10002 | 9548K | 58K |
| 29 | TABLE ACCESS FULL | D_STR_ITEMS_CUR | 9548K | 58K |
---------------------------------------------------------------------------+----------------
這裡去掉了一些不必要的內容。從SQL語句中的HINT以及執行計劃都可以看到，這是一個平行SQL，當然報錯程式p000和p001也說明了這一點。
查詢MOS發現是Bug 5113934 - PQ slave dump in qerixGetKey() when using bitmap index access [ID 5113934.8]，而當前的執行計劃中確實出現了BITMAP索引。
這個bug確認影響10.2.0.3，而這正是當前的版本。這個bug在10.2.0.4和11.1.0.6中被fixed。除了打補丁外，禁止並行或星形查詢同樣可以避免這個錯誤，不過無論禁止並行還是星形查詢，都會犧牲一定的效能。
來自 “ ITPUB部落格 ” ，連結：http://blog.itpub.net/4227/viewspace-712841/，如需轉載，請註明出處，否則將追究法律責任。
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