Preparing the Preliminary Estimate - MultiLoad

Teradata® MultiLoad Reference - 20.00

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
Lake
VMware
Product
MultiLoad
Release Number
20.00
Published
October 2023
Language
English (United States)
Last Update
2024-03-18
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Product Category
Teradata Tools and Utilities

Use the following formula to prepare the preliminary estimate for one target table, assuming no fallback protection, no journals, and no NUSIs:

PERM = (using data size + 38) * (number of rows processed) * number of apply conditions satisfied) * (number of Teradata SQL statements within the applied DML)

For example, in the following Teradata MultiLoad job the preliminary estimate would be 84 * (number of rows processed):

.LOGTABLE LOGTABLE001;
.LOGON TDP0/xxxxx,xxxxx ;
.BEGIN MLOAD TABLES A;
.LAYOUT TRANSACTION;
.FILLER  TRANSCODE * CHAR(4);
.FIELD   PIDX * CHAR(2);
.FIELD   VAL * CHAR(2);
.DML LABEL  DEL;
DELETE FROM A WHERE UPI = :PIDX AND VAL = :VAL (SMALLINT);
.DML LABEL  INS;
INSERT INTO A (UPI, VAL) VALUES (:PIDX, :VAL (SMALLINT));
.IMPORT INFILE DAT01
LAYOUT TRANSACTION
APPLY  DEL
APPLY  INS;
.END MLOAD;
.LOGOFF;

where

  • using data size = 4 (2 for FIELD PIDX and FIELD VAL. FILLER fields are not counted.)
  • number of apply conditions satisfied = 2, since the APPLY statements APPLY and APPLY INS are unconditional.
  • number of Teradata SQL statements within the applied DML = 1, since the DML LABEL DEL and DML LABEL INS commands have one SQL statement each.