Identifying Space Problems Using Viewpoint - Teradata Database

Teradata Database Administration

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Use the Space Usage portlet to track detailed space usage parameters, including available space, current usage, and peak usage for each space type, by database or user.

1 Select the system you want to investigate and click Next>.

2 In the selection menu, select Database: By most space and click Next>.

3 Use the Database Total view to display perm space usage for all databases that have assigned perm space. The following columns may indicate perm space problems.





Current Perm%

Percentage of available perm space currently being used by each user and database.

Consider allocating additional perm space to any user or database when it reaches 90% perm space usage. See “Reallocating Perm Space to Resolve Space Issues” on page 177.


Peak Perm%

The highest percentage of total available perm used by each user and database since the last reset (default 24 hours).

Current Perm Skew%

A measure of how the perm space for a database distributes across all AMPs. Higher percentages indicate uneven distribution.

A high perm skew percentage indicates that one or more tables in the database is skewed, that is, it has a poorly designed primary index.

To identify skewed tables, see “Finding and Fixing Skewed Tables Using Viewpoint” on page 178.

Note: If you think there is a space problem, you can click on a database name to display the Details view, which shows the current perm, peak perm, and skew% for each table in the database.

4 Use the Users Over 85% Spool view to display any users that have exceeded the safe range of spool usage since the last reset.

Note: In some cases excess spool usage may be the result of poorly constructed queries rather than an actual shortage of spool.





Current Spool%

Percentage of available spool space currently being used by each user and database (list)

Monitor regularly to determine whether certain users regularly exceed 85% spool.

  • Use Query Monitor to track query activity for users exceeding the limit, to determine whether the excessive spool usage is caused by poorly constructed queries.
  • Increase the spool space limit for users who need spool by modifying the user or applicable profile definition. See “Increasing the Spool Space Limit for a User” on page 178.
  • Peak Spool%

    Largest percentage of available spool space recently used by each listed user and database since the last reset (default 24 hours).