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ora-7445 error or core dump while querying V$OPEN_CURSOR (Doc ID 435093.1)

Last updated on OCTOBER 01, 2019

Applies to:

Oracle Database - Enterprise Edition - Version and later
Information in this document applies to any platform.
Oracle Server - Enterprise Edition - Version:
This problem can occur on any platform.


You run a query against V$OPEN_CURSOR and you see an ORA-7445 error and/or a core dump.

If you review the 'stack' portion of the trace file, you will see some or all of the following function codes.:

kglLockIterator kqlftl qerfxFetch qerghFetch qerflFetchOutside opifch2


An explain plan inside the trace would
confirm access on fixed table X$KGLLK. 

If you search the trace file for "X$KGLLK" you will find an explain plan that is something like:

Plan Table
| Id | Operation | Name | Rows | Bytes | Cost | Time |
| 0 | SELECT STATEMENT | | | | | |
| 1 | SORT AGGREGATE | | | | | |
| 2 | FIXED TABLE FULL | X$KGLLK | | | | |


This may occur after an upgrade or patch application but it may also occur during normal business processing.


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