|
Problem IT44034
|
Status: Closed |
VARIOUS MEMORY CORRUPTION WITH STMT_CACHE AND EXT_DIRECTIVES AREENABLED
|
| product: |
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10 |
| Problem description: |
This problem is introduced into 12.10.FC15/14.10.FC5 with the
fix for APAR IT33659.
The server will have STMT_CACHE and EXT_DIRECTIVES enabled as
shown below:
STMT_CACHE 2
EXT_DIRECTIVES 2
The memory corruption can cause any number of assertions but
common assertions include memory block header corruption.
One thing to look for to help identify this defect when
statement cache is turned on and external directives are enable
is the memory corruption will typically look shifted by a byte
or possibly a few bytes. Without a shared memory dump, this can
sometimes be obvious in an assertion failure file that reports
memory block header corruption as the surrounding memory is
dumped into the file. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users of Informix Server 14.10.xC5* to 14.10.xC10* *
* inclusive. Also users of Informix Server 12.10.FC15 to *
* 12.10.FC16W1 inclusive. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Informix Server 14.10.xC11. A future release of *
* Informix Server 12.10 will address this as well. *
**************************************************************** |
| Local Fix: |
A workaround is to disable EXT_DIRECTIVES (usually preferred) or
to disable STMT_CACHE |
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* Users of Informix Server 14.10.xC5* to 14.10.xC10* *
* inclusive. Also users of Informix Server 12.10.FC15 to *
* 12.10.FC16W1 inclusive. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Informix Server 14.10.xC11. A future release of *
* Informix Server 12.10 will address this as well. *
**************************************************************** |
| Comment |
Fixed in Informix Server 14.10.xC11. |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 22.06.2023
03.06.2024
03.06.2024 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
