How can you define the amount of memory required for the performance indicator log of the Windows system monitor (performance monitor)?
The hard disk space required for a performance indicator log file depends on:
- the type and number of the performance indicators used
- the acquisition cycle
- the duration of the logging (logging time)
In order to avoid a memory problem you should try out the size of a performance indicator log file before running the diagnostics.
This entry describes how you should proceed to do that.
|1||End the configuration of the performance indicator log|
The configuration of the performance indicator log should be ended. If you change parameters of a performance indicator log, then it is highly likely that the memory requirement of the associated log file will also change. You should then determine the memory required once again.
|2||Make multiple test recordings|
Make several test recordings of the performance indicator log in one log file.
|3||Determine the memory requirement per data record|
Determine the size of each log file recorded. For this you open the Windows Explorer and go to the directory in which the log files are located. Switch the view of the Windows Explorer to "Details" if necessary. The log files and their sizes are now displayed in the Windows Explorer. Convert the size of each log file to a standard logging time (e.g. 1 minute) or the size per data record.
The following figure shows the log files in the Windows Explorer.
The following table shows the memory requirement for the various test recordings.
From the table you can see that one data record does not require more than 50 KB in the log file. It can generally be assumed that each data record probably requires less than 50 KB.
|4||Calculate the maximum logging time|
Using the value determined in Step 3 for the size of a data record, the acquisition interval and size of the free space on the hard disk, you can now calculate the relevant maximum logging time. At the latest once the logging time has expired, you should check the free space, save the log files and if necessary delete some.
The calculated maximum logging time is approx. 72 days.