Crashdumps appear as table images, which contain information that Teradata Services uses to investigate crashes.
To assign perm space to the crashdumps:
- Calculate optimal perm space for the crashdumps database using the formula:
Crashdumps Perm Space = (Number of TPA Nodes) * (Memory in GB per node) * (6)This equation is based on the following assumptions:
- 32 GB of memory per node
- A crashdump uses approximately 50% of node memory capacity
- Allocate enough space for at least 3 crashdumps
- If you specify FALLBACK protection for tables, the required space doubles
Based on these assumptions, the calculation for a four-nodes system is:
Crashdumps Perm Space = (4) * (32 GB) * (6), or 768 GB.
- Modify the default perm space value for the crashdumps user from the 1 GB default to the calculated value:
MODIFY USER Crashdumps AS PERM=perm_spaceSTARTUP = '' FALLBACK NO BEFORE JOURNAL NO AFTER JOURNAL COLLATION = HOST DEFAULT CHARACTER SET = LATIN DATEFORM = INTEGERDATE TIME ZONE = NULL ;
where perm_space is the amount of space you calculated. All other syntax elements shown are default settings.Periodically monitor crashdumps space utilization and adjust space allocations as necessary.
|For step...||Information on...||Is available in...|
|1 and 2||The use and maintenance of the crashdumps database||Teradata Vantage™ - Database Administration, B035-1093|
|Details about perm space|
|2||The MODIFY DATABASE statement||Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144|