Deadlock inserting into same rowid (different block)

From: Patterson, Joel <jpatterson_at_entint.com>
Date: Wed, 20 Mar 2013 10:49:01 -0400
Message-ID: <C1117B1AA0340645894671E09A7891F714F883380F_at_EIHQEXVM2.ei.local>

Object rowed 199909 is a FK on child table. The foreign_key is indexed (one column to one column PK in parent)

What scenario might cause this deadlock? I am googling around but not finding this scenario - most discussions in insert revolve around indexing FKs.

SQL for both sessions is:
Insert into child_table (cola,colb,...) values (:1,:2,...);

Deadlock graph:

                       ---------Blocker(s)--------  ---------Waiter(s)---------
Resource Name          process session holds waits  process session holds waits
TX-001a0015-00014787        34      90     X             32       3           S
TX-00190008-0000601b        32       3     X             34      90           S

session 90: DID 0001-0022-00000327      session 3: DID 0001-0020-000009E9
session 3: DID 0001-0020-000009E9       session 90: DID 0001-0022-00000327

Rows waited on:
  Session 90: obj - rowid = 00030CE5 - AAAwzlAAGAABDiuAAA   (dictionary objn - 199909, file - 6, block - 276654, slot - 0)   Session 3: obj - rowid = 00030CE5 - AAAwzlAAGAABp8gAAA   (dictionary objn - 199909, file - 6, block - 433952, slot - 0)

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Joel Patterson
Sr. Database Administrator | Enterprise Integration
Phone: 904-928-2790 | Fax: 904-733-4916
www.entint.com<http://www.entint.com/>



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Received on Wed Mar 20 2013 - 15:49:01 CET