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deadlocks analysis (ORA-00060)

DBA092012Nov 9 2015 — edited Nov 9 2015

Hello everyone.

I've been analyzing a trace related to the recent ORA-00060

Deadlock graph:

                       ---------Blocker(s)--------  ---------Waiter(s)---------

Resource Name          process session holds waits  process session holds waits

TX-00060013-000cae80       166     180     X            100     122           S

TX-0028000e-0000cd68       100     122     X            166     180           S

session 180: DID 0001-00A6-00000064     session 122: DID 0001-0064-00000002

session 122: DID 0001-0064-00000002     session 180: DID 0001-00A6-00000064

Rows waited on:

  Session 180: obj - rowid = 00017A3A - AAAXo6AAAAAAAAAAAA

  (dictionary objn - 96826, file - 0, block - 0, slot - 0)

  Session 122: obj - rowid = 00017A3A - AAAXo6AAAAAAAAAAAA

  (dictionary objn - 96826, file - 0, block - 0, slot - 0)

As you can see here we have objn which corresponds to the OBJECT_ID in the dba_objects table:

select owner, object_name, OBJECT_TYPE from dba_objects where OBJECT_ID=96826;

PAYNET    IDX$PAY_OPER#STATUS    INDEX

select table_name from dba_indexes where INDEX_NAME in (select object_name from dba_objects where OBJECT_ID=96826 and owner='PAYNET');

TBL$PAY_OPER ( so here is related table)

After that that we can see rowid which is equal to 'AAAXo6AAAAAAAAAAAA'

So i take the value of the rowid and put it to the query

select * from TBL$PAY_OPER where rowid like 'AAAXo6AAAAAAAAAAAA';

and have nothing in returne

above that all that related stuff above file - 0, block - 0, slot - 0

all zeros

Could someone put here some comments please?

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Locked on Dec 7 2015
Added on Nov 9 2015
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