Teradata Parallel Data Pump

Chapter 3: Teradata TPump Commands
BEGIN LOAD
Syntax Element
PACK
statements
RATE
RETRYTIMES nn
Description
Keyword for the number of statements to pack into a multiplestatement
request.
Maximum value is 2430.
Packing improves network/channel efficiency by reducing the number
of sends and receives between the application and Teradata Database.
Number of statements, as a positive integer of up to 2430, to pack into a
multiple-statement request.
Default value is 20 statements per request.
Under certain conditions, Teradata TPump may determine that the pack
factor has been set too high. Teradata TPump then automatically lowers
the pack setting to an appropriate value and issues warning message
UTY6625, for instance:
“UTY6625 WARNING: Packing has been changed to 12 statements per
request” and continues.
Packing improves network/channel efficiency by reducing the number
of sends/receives between the application and the database.
The packing factor is validated by sending a fully packed request to
Teradata Database using a prepare. This test checks for syntax problems
and requests that are excessively large and may overwhelm the parser.
To simplify the script development process, Teradata TPump ignores
certain errors returned by an overloaded parser, shrinks the request,
retries the prepare until it executes successfully and finally, issues a
warning noting the revised packing factor size.
When this happens, the Teradata TPump script should be modified to
eliminate the warning, thereby avoiding the time-consuming process of
shrinking the request.
A packing failure may occur if the source parcel length does not match
the data defined. If this happens, Teradata TPump issues the message:
“UTY2819 WARNING: Packing may fail because input data does not
match with the data defined.”
To resolve this problem, increase the packing factor and resubmit the
job.
Keyword for entering the rate at which statements are sent to Teradata
Database.
Keyword for retry times number of retry times.
Default is 16.
If nn equals 0, the retry times will be set to 16. If retrytimes is set, this
only takes effect for the requests/data between "BEGIN LOAD" and
"END LOAD" pair.
Teradata Parallel Data Pump Reference 103