|
Problem IT35444
|
Status: Closed |
MULTIPLE MEMORY LEAKS IN GEO-SPATIAL CALLS WHEN EXECUTING CERTAIN GEO-SPATIAL FUNCTIONS
|
| product: |
DB2 FOR LUW / DB2FORLUW / B50 - DB2 |
| Problem description: |
There are multiple a memory leaks which are triggered by
Geo-spatial function calls.
1. Starting in V11.5GA and later using Spatial Extender and
Spatial Analytics functions ST_LOCATEALONG, ST_LOCATEBETWEEN,
ST_FINDMEASURE, ST_MEASUREBETWEEN and ST_BUFFER may result in
memory leaks when executed.
2. Starting in V11.5.5 using Spatial Analytics functions (in
addition to the first issue) a memory leak occurs when executing
any spatial ST_* function requiring a coordinate system for
processing, e.g. any of the spatial relation functions such as
ST_INTERSECTS.
The symptoms are shown in:
a) top output ( The RES - SHR value for db2sysc would be
unusually large )
OR
b) ps -elf output will show an unusually large size for the
db2sysc pid and it will slowly keep growing
AND
c) db2pd -memblocks pid= will show OSSe blocks
allocated with LOC 43 and File 0.
A snippet of the output from db2pd -memblocks output:
Address DataAddress PoolID PoolName BlkAge
Size(Bytes) I LOC File
0x00002AABEE9008E0 0x00002AABEE9008F0 OSSe OSSe OSSe
304 1 43 0
0x00002AABEE900A40 0x00002AABEE900A50 OSSe OSSe OSSe
296 1 43 0
0x00002AABEE900B90 0x00002AABEE900BA0 OSSe OSSe OSSe
296 1 43 0
0x00002AABEE900CE0 0x00002AABEE900CF0 OSSe OSSe OSSe
320 1 43 0 |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* all *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Db2 11.5.5.1 or higher *
**************************************************************** |
| Local Fix: |
The fix is included in V11.5.5.1 and later. |
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* all *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to Db2 11.5.5.1 or higher *
**************************************************************** |
| Comment |
Upgrade to Db2 11.5.5.1 or higher |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 07.01.2021
31.03.2021
31.03.2021 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
