16.10 - Adding Vprocs - Teradata Database

Teradata Database Administration

Product
Teradata Database
Release Number
16.10
Release Date
April 2018
Content Type
Administration
Publication ID
B035-1093-161K
Language
English (United States)

The following table lists reasons for adding vprocs.

IF you want to … THEN add …
increase storage capacity disks, probably with AMPs, and perhaps nodes. When you add storage, you normally add AMPs.

The number of AMPs you add depends on the number of ranks assigned to the existing AMPs. For example, if you add two disk cabinets to each of 20 ranks, you would add 10-20 more AMPs to your configuration.

Teradata recommends that you increase memory when you add AMPs.

If your existing CPUs cannot handle the load caused by the additional AMPs, you may also need to add nodes.

reduce single-user response time AMPs.
  • Optimization of single-user throughput or response time is especially significant when there are fewer AMPs than CPUs per node.
  • In a concurrent workload, you might be able to achieve the desired throughput by adding more AMPs to existing nodes.
  • Be sure your memory is adequate for the additional AMP workload.
increase the capacity for concurrent sessions PEs, perhaps nodes, and perhaps a mainframe connection.
  • For network sessions, add PEs if you have fewer than 10 PEs per node. If you already have 10 PEs per node, add another node.
    The session limit is 120 for each PE and 1200 for each gateway. Because each node runs just one instance of the gateway, more than 10 PEs per node does not provide increased network sessions.
  • The channel driver does not have a session limit, but normally one PE is configured for each channel connection.

    If your configuration has less than 4 channel connections, you can add another channel connection and another PE.

  • Verify that there is enough CPU capacity to handle more PEs. If not, add nodes.