|
Problem IT31851
|
Status: Closed |
A CHUNK CAN BE EXTENDED PAST THE INTERNAL LIMIT OF 2,147,483,647PAGES
|
| product: |
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10 |
| Problem description: |
When chunk extension is enabled, it is possible to extend the
size of a chunk beyond the internal limit of 2,147,483,647
(0x7fffffff) pages.
When this happens, the first symptom is a negative chunk size in
the
onstat -d output. However, this will also lead to I/O errors as
the server attempts
to use the chunk pages that are now all beyond the negative
chunk size. Examples:
Chunk in space '' has been extended by
14497846 kb.
I/O bad request chunk , pagenum 1807035447, pagecnt 1
I/O bad request chunk , pagenum 111209559, pagecnt 1
I/O bad request chunk , pagenum 2037804858, pagecnt 1
I/O bad request chunk , pagenum 111263159, pagecnt 1
Assert Warning: I/O bad request chunk , pagenum
891944057, pagecnt 1 |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users of Informix Server prior to 12.10.xC14 and 14.10.xC4. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Update to Informix Server 12.10.xC14 or 14.10.xC4 (when *
* available). *
**************************************************************** |
| Local Fix: |
Disable chunk extension if the chunk is anywhere near
2,147,483,647 pages.
EXECUTE FUNCTION task("modify chunk extendable off", "chunk
number"); |
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* Users of Informix Server prior to 12.10.xC14 and 14.10.xC4. *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Update to Informix Server 12.10.xC14 or 14.10.xC4 (when *
* available). *
**************************************************************** |
| Comment |
Update to Informix Server 11.70.xC9W2, 12.10.xC14 and 14.10.xC4.
Change summary:
The server now calculates the maximum size of a chunk based on
the dbspace's page size and ensures that no chunk is extended
beyond that size. If the chunk is at the maximum size, the
server will turn off the extendable flag and will not allow the
chunk to be made extendable again. Messages are written to the
online message log explaining the reason for the new behavior. |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 12.02.2020
04.03.2020
31.08.2020 |
| Problem solved at the following versions (IBM BugInfos) |
12.10.xC14,
14.10.xC4
|
| Problem solved according to the fixlist(s) of the following version(s) |
