What is groom in Netezza?

The GROOM TABLE command reclaims disk space, reorganizes tables that are based on the clustered base table organizing keys, and migrates data for tables that have multiple stored versions. For more information, see the IBM Netezza System Administrator’s Guide .

How do I check my groom status in Netezza?

When you select a database in the top pane of the Database Administration view, the lower pane has a Groom Status tab that summarizes the information for any active grooms that are running on that database.

What database does netezza use?

The IBM® Netezza® data warehouse appliance includes a highly optimized SQL that is called IBM Netezza Structured Query Language (SQL). You can use the SQL commands to create and manage your Netezza databases, user access and permissions for the databases, and to query the contents of the databases.

How is the groom table used in Netezza?

Use the GROOM TABLE command to maintain the user tables by reclaiming disk space for deleted or outdated rows. You can also use GROOM TABLE command to reorganize the tables by their organizing keys columns. End user can execute DML statements such as SELECT, UPDATE, DELETE, and INSERT operations while the data grooming is running.

What do you need to know about Netezza software?

Netezza sells software-based products for migrating from Oracle Exadata and for implementing data virtualization and federation ( data abstraction) schemes. The Netezza appliance was the foundation of IBM DB2 Analytics Accelerator (IDAA). In 2012 the products were re-branded as IBM PureData for Analytics.

How to groom a table in a database?

Syntax for grooming database using nzreclaim: GROOM TABLE replaced this option but can be used in grooming database RECORDS READY – Reclaim and reorganize records in the table that is not groomed and those tables previously groomed but marked for re-grooming.

Why do we need a neteza table to reclaim disk space?

Because compression is variable,when you delete a row, it is not certain whether any other row can fit entirely within the space left by the deleted. It would be extermely deleterious to performance to determine a row’s size first and then hunt for a deleted row’s space that would accommodate the new row.