10.1.10 OS resource utilization
The limiting values recommended in this section for OS servers or OS single stations are based
on empirical values. They are listed as OS quantity structures in the event of Alarm Logging
and Tag Logging in the PCS 7 catalog.
Work station
Once the OS engineering has completed with OS runtime running check that there is sufficient
hard disk memory for operating the Microsoft SQL servers.
System partition (C): The free memory space must be greater than 20%.
Task Manager
Once the OS engineering has completed with OS runtime running check that the following
values are being adhered to within the Task Manager:
● System performance: Processor utilization less than 30% on average
● System performance: Available physical memory greater than 200 MB
Alarm Logging
Once the OS engineering has completed with OS runtime running check that the permanent
load of messages for an OS server is less than 10 messages per second.
The check can be made by additional configuration of an Alarm Control as a hitlist in a process
picture.
Tag Logging
Once the OS engineering has completed with OS runtime running check that the tag archiving
for an OS server is less than 1500 values per second.
For this monitor the internal tags @TLGRT_TAGS_PER_SECOND and
@TLGRT_AVERAGE_TAGS_PER_SECOND in the TagLoggingRT group.
Note
Check the configuration as well as the associated infrastructure if these limiting values are
being reached or even exceeded.
AS-OS communication
The wait time when opening pictures/faceplates depends partly on the AS load from which the
data for the corresponding picture/faceplate was obtained. A faceplate can therefore exhibit
different representation times when responding to the associated block in two different
automation systems.
Configuring OS functions
10.1 Project settings
Compendium Part A - Configuration Guidelines (V8.2)
222 Configuration Manual, 08/2016, A5E38166869-AA
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