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当 Oracle 检测到死锁时，会写入如下跟踪文件：

*** SESSION ID:(56.27081) 2012-05-14 08:16:28.013
DEADLOCK DETECTED ( ORA-00060 )
[Transaction Deadlock]
The following deadlock is not an ORACLE error. It is a
deadlock due to user error in the design of an application
or from issuing incorrect ad-hoc SQL. The following
information may aid in determining the deadlock: Deadlock graph:
                       ---------Blocker(s)--------  ---------Waiter(s)---------
Resource Name          process session holds waits  process session holds waits
TX-0010002c-002719b5       146      56     X            164      44           X
TX-000f002a-002edd1e       164      44     X            146      56           X
session 56: DID 0001-0092-00050D0D       session 44: DID 0001-00A4-0002E3C2
session 44: DID 0001-00A4-0002E3C2       session 56: DID 0001-0092-00050D0D
Rows waited on:
Session 44: obj - rowid = 00035157 - AAA1FXAAxAAASfLAAn
  (dictionary objn - 217431, file - 49, block - 75723, slot - 39)
Session 56: obj - rowid = 00035157 - AAA1FXAAsAACjuiAAP
  (dictionary objn - 217431, file - 44, block - 670626, slot - 15)

如何根据以上信息确定涉及的行，以协助调试应用程序？

4

1 回答 1

12

我找到了答案：

  1. 后面的数字dictionary objn可用于从 DBA_objects 中进行选择。

    SELECT owner, object_name, object_type 
FROM dba_objects 
WHERE object_id = 217431;

  2. 识别表后，可以使用 rowid 找到该行：

    SELECT * 
FROM table_found_above 
WHERE rowid = 'AAA1FXAAxAAASfLAAn';

如果跟踪文件显示没有“等待的行”，则此技术将不起作用。该问题可能是由于未编制索引的外键造成的。

于 2012-05-14T03:44:10.553 回答