Hello Rupali
Error in here is straight forward.
===================
DIA8300C A memory heap error has occurred.
===================
Please check available memory resources on your system
You can run " db2pd -dbptnmem
this command should give you current usage and HighwaterMark memory used.
eg of above command output will be like below.
=============================================
Database Member 0 -- Active -- Up 6 days 00:59:55 -- Date 2015-09-24-15.47.43.22 2329
Database Member Memory Controller Statistics
Controller Automatic: N
Memory Limit: 2800000 KB (1)
Current usage: 2162496 KB (2)
HWM usage: 2767616 KB (3)
Cached memory: 393344 KB
Individual Memory Consumers:
Name Mem Used (KB) HWM Used (KB) Cached (KB)
========================================================
APPL-DB6 27904 160000 9024
DBMS-db2db6 118976 166976 640
FMP_RESOURCES 22528 22528 0
PRIVATE 74496 513600 0
DB-DB6 1918336 2516928 383680
LCL-p12463 128 128 0
LCL-p20300 128 128 0
====================================================
1) Memory limit is INSTANCE_MEMORY in the database manager configuration, upper limit of database memory since V9.5 INSTANCE_MEMORY is the amount of memory used from db2sysc. But there are other processes outside of db2sysc.
2) Current usage, it can happen that INSTANCE_MEMORY becomes bigger than the configured limit.
3) HWM Usage is max used memory value.
Based on these figures you need to consider the options to increase INSTANCE_MEMORY or other database memory allocations.
Further more you can refer to IBM documentation based on your current DB version.
Hope it helps
Thanking you
Regards
Venkat.