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Informix - Problem description

Problem IT42672 Status: Closed

REPLICATING SMARTBLOBS GREATER THAN 2GB ISSUE.

product:
INFORMIX SERVER / 5725A3900 / E10 - 
Problem description:
When replicating smartblobs with a size greater than 2GB, you
can see it going through ER queues but then it just ends up with
a 0 byte in the sbspace.

In the following oncheck output, there's a ~1.5 MB FILETOBLOB
which shows correctly, the second one corresponds to a ~3.5 GB
FILETOBLOB on the replicated server

informix@farias-ThinkPad-P50:~/prods/12.10/FC14$ oncheck -cS
sbspace1

Validating space 'sbspace1' ...

  sbspace Metadata Partition                       Partnum
Used      Free
  sbspace1:'informix'.TBLSpace                     0xb00001
6        44
  sbspace1:'informix'.sbspace_desc                 0xb00002
2         2
  sbspace1:'informix'.chunk_adjunc                 0xb00003
2         2
  sbspace1:'informix'.LO_ud_free                   0xb00004
2     10865
  sbspace1:'informix'.LO_hdr_partn                 0xb00005
2     61361

  Large Objects
  ID               Ref Size       Allocced       Creat   Last
  Sbs# Chk#  Seq#  Cnt    (Bytes)    Pages Extns Flags
Modified
  ---- ---- ----- ---- ---------- -------- ----- -----
------------------------
    11   11     1    1    1674465      833     1 N-N-H Wed Dec
7 14:33:47 2022
    11   11     2    1          0        0     0 N-N-H Wed Dec
7 15:31:18 2022

informix@farias-ThinkPad-P50:~/prods/12.10/FC14$ oncheck -pe
sbspace1


DBspace Usage Report: sbspace1            Owner: informix
Created: 12/07/2022


 Chunk Pathname                             Pagesize(k)  Size(p)
Used(p)  Free(p)
    11
/External/prods/12.10/FC14/storage/ol_informix1210_sbspace1_p_1
2  4194304 see below see below

 Description
Offset(p)  Size(p)
 -------------------------------------------------------------
-------- --------
 RESERVED PAGES
0        2
 CHUNK FREELIST PAGE
2        1
 sbspace1:'informix'.TBLSpace
3       50
 SBLOBSpace LO [11,11,1]
53      833
 SBLOBSpace FREE USER DATA (AREA 1)
886  1116286
 SBLOBSpace RESERVED USER DATA (AREA 1)
1117172   838848
 sbspace1:'informix'.sbspace_desc
1956020        4
 sbspace1:'informix'.chunk_adjunc
1956024        4
 sbspace1:'informix'.LO_ud_free
1956028    10867
 sbspace1:'informix'.LO_hdr_partn
1966895    61363
 SBLOBSpace FREE META DATA
2028258   210078
 SBLOBSpace RESERVED USER DATA (AREA 2)
2238336   838848
 SBLOBSpace FREE USER DATA (AREA 2)
3077184  1117120

 Total Used:    73124
 Total SBLOBSpace FREE META DATA:   210078
 Total SBLOBSpace FREE USER DATA:  3911102

i


While following shows on the source correctly:

informix@affinity:~$ oncheck -cS sbspace1

Validating space 'sbspace1' ...

  sbspace Metadata Partition                       Partnum
Used      Free
  sbspace1:'informix'.TBLSpace                     0xb00001
6        44
  sbspace1:'informix'.sbspace_desc                 0xb00002
2         2
  sbspace1:'informix'.chunk_adjunc                 0xb00003
2         2
  sbspace1:'informix'.LO_ud_free                   0xb00004
2     10865
  sbspace1:'informix'.LO_hdr_partn                 0xb00005
2     61361

  Large Objects
  ID               Ref Size       Allocced       Creat   Last
  Sbs# Chk#  Seq#  Cnt    (Bytes)    Pages Extns Flags
Modified
  ---- ---- ----- ---- ---------- -------- ----- -----
------------------------
    11   11     1    1    1674465      829     1 N-N-H Wed Dec
7 14:33:45 2022
    11   11     2    1    1674465  1907463     2 N-N-H Wed Dec
7 14:45:23 2022

informix@affinity:~$ oncheck -pe sbspace1



DBspace Usage Report: sbspace1            Owner: informix
Created: 12/07/2022


Chunk Pathname                             Pagesize(k)  Size(p)
Used(p)  Free(p)
    11
/home/informix/prods/12.10/FC14/storage/ol_informix1210_sbspace1
_p_1            2  4194304 see below see below

Description
Offset(p)  Size(p)
-------------------------------------------------------------
-------- --------
RESERVED PAGES
0        2
CHUNK FREELIST PAGE
2        1
sbspace1:'informix'.TBLSpace
3       50
SBLOBSpace LO [11,11,1]
53      829
SBLOBSpace LO [11,11,2]
882   790343
SBLOBSpace FREE USER DATA (AREA 1)
791225   325947
SBLOBSpace RESERVED USER DATA (AREA 1)
1117172   838848
sbspace1:'informix'.sbspace_desc
1956020        4
sbspace1:'informix'.chunk_adjunc
1956024        4
sbspace1:'informix'.LO_ud_free
1956028    10867
sbspace1:'informix'.LO_hdr_partn
1966895    61363
SBLOBSpace FREE META DATA
2028258   210078
SBLOBSpace RESERVED USER DATA (AREA 2)
2238336   838848
SBLOBSpace LO [11,11,2]
3077184  1117120

Total Used:  1980583
Total SBLOBSpace FREE META DATA:   210078
Total SBLOBSpace FREE USER DATA:  2003643


You can verify with onstat -g rqm recvq that it's being
sent/received
Problem Summary:
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 14.10.FC10.                *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 14.10.FC10.                       *
****************************************************************
Local Fix:
Solution
Workaround
****************************************************************
* USERS AFFECTED:                                              *
* Users of Informix Server prior to 14.10.FC10.                *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* See Error Description                                        *
****************************************************************
* RECOMMENDATION:                                              *
* Upgrade to Informix Server 14.10.FC10.                       *
****************************************************************
Comment
Fixed in Informix Server 14.10.FC10.
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
08.12.2022
23.02.2023
23.02.2023
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
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