How much memory does a single data log value consume within PME?

Issue
How much memory does a single data log value consume within PME?

Product Line
Power Monitoring Expert (PME)
StruxureWare Power Monitoring (SPM)
ION Enterprise (ION-E)

Environment
SQL server databases

Resolution
This value can vary based on the installed version of PME for the system, but this can be checked through SQL Management Studio.

** Warning:  Only those familiar with SQL server and PME should be working with SQL Management Studio.  Making direct modifications to the PME databases can leave a system inoperable and require restoration from backups. **

1)  Log in to SQL Management Studio
2)  Expand the databases folder, right-click ION_Data, select Reports < Standard Reports <  'Disc Usage by Top Tables'



3) This will produce a report that shows the memory usage per table within the database as shown below.



4) Divide the number of records by the Data (KB) column for the DataLog2 table.  This will give an approximate value of the memory usage for a single-row entry.
2,265,592 / 95,808 = 23.6472110888, so each row entry within the DataLog2 table consumes approximately 23.67 kilobytes of hard drive space.
This example was taken from a PME 8.1 test system.

Udgivet til: Schneider Electric Danmark