Reference Values For Execution Time Of Db Connection Instructions; Instructions - Omron NX701-1620 User Manual

Appendix B

Reference Values for Execution Time of DB Connection Instructions

B-1-2
The DB Connection Instructions are function block type of instructions that are executed over multiple
task periods.
The following table gives the reference values for execution time of each DB Connection Instruction.
Refer to B-2-1 Restrictions to Execution Time of DB Connection Instructions for the factors that
fluctuate execution time of DB Connection Instructions.
Conditions
DB_Insert: When executing an INSERT operation for 100-column record
DB_Select: When searching for one record from 100,000 records and retrieving 100-column data*
* The primary key is specified for the retrieval condition.
Measurement Condition 1
The following table shows the measurement conditions and items.
Measurement conditions
Item
CPU Unit
Server
SQL statement to
execute
Operation Logs
 NX701-1720
DB type
Oracle Database 11g
SQL Server 2012
DB2 10.5
MySQL 5.6
Storage engine:
InnoDB
Firebird 2.5
PostgreSQL 9.4
B-4
Subitem
Task composition Primary periodic task only
Task period: 1 ms
DB Map Variable: An internal variable of a program
Computer CPU: Intel Xeon(R) CPU E5-2603 @ 1.7GHz, 6 Core
Memory: 32.00GB
Operating system Windows Server 2016 Standard 64bit
DB type Oracle Database Express Edition 11g 11.2.0
SQL Server 2016
DB2 for Linux, UNIX and Windows 10.5
MySQL Community Edition 5.6
Firebird 2.5
PostgreSQL 9.4
Record INT: 40 columns
composition REAL: 40 columns
STRING[16]: 16 columns
DATE_AND_TIME: 4 columns
Execution Log Recorded
Debug Log Stopped
SQL Execution Not recorded
Failure Log
for instruction execution time
Instruction
Average
DB_Insert 2.4 ms
DB_Select 5.11 ms
DB_Insert 2.35 ms
DB_Select 2.62 ms
DB_Insert 3.44 ms
DB_Select 7.39 ms
DB_Insert 15.76 ms
DB_Select 2.21 ms
DB_Insert 12.95 ms
DB_Select 21.22 ms
DB_Insert 2.93 ms
DB_Select 5.16 ms
Description
Reference value
Maximum
12 ms
22 ms
13 ms
21 ms
21 ms
20 ms
74 ms
10 ms
32 ms
32 ms
21 ms
14 ms
NJ/NX-series Database Connection CPU Units User's Manual (W527)