Activating and Configuring the Activity Data Collector 
Procedure
Activate and configure the activity data collector by modifying properties of the DataCollectionHook portal service, and then restarting the service.
The activity data collector writes each record to the main file, as specified by the Main File Format property, and additional files as specified by the Additional FileFormats property.
Navigate to
System Administration 
System Configuration Service Configuration 
.In the Portal Catalog, navigate to the portal service at
Applications com.sap.portal.activitydatacollector Services DataCollectionHook .Right-click DataCollectionHook, and select Configure.
Set the following properties:
Property
Description
Activate Data Collector
Turns on the data collector and starts creating data files.
Valid values are true (activated) and false (not activated). The default is false.
Additional File Formats
The formats for additional data files.
Place each file format inside braces, without a separator, as follows:
{<format1>} {<format2>). . .
The file name of each additional file is in the format:
add_<seq>_<base name>_<nodeID>_<timestamp>
where:
seq is a sequence number.
base name is defined by the Base File Name property.
nodeID is the ID of the server node in the cluster.
timestamp is the time the file was created.
For more information on specifying the file format, seeFile Formats.
Base File Name
The base string from which to build each data file name, as described in the Main File Format and Additional File Formats properties.
Directory Name
The directory in which the data file is written, either:
Relative to the <System ID><Instance ID>/j2ee/cluster/server0 directory
An absolute path on the server, starting with <Drive>:\
File Encoding
The file encoding of the data files.
The default is UTF-8.
Hour in the day to close all files
The hour in the day to close all open files and start writing to a new file, in GMT.
It may take up to two hours from the specified hour for the file to close.
0 = midnight, 23 is 11 p.m.
Main File Format
The format for the main file.
The file name of the main file is in the format:
<base name>_<nodeID>_<timestamp>
where:
base name is defined by the Base File Name property.
nodeID is the ID of the server node in the cluster.
timestamp is the time the file was created.
For more information on specifying the file format, seeFile Formats
Max Buffer Size
The amount of data to store in memory before writing the data to a file, in kilobytes.
NoteThe value for this property can significantly affect performance, and it is best to experiment to find the best value.
Generally, a high number reduces the number of calls to the database, improving performance, but also requires more data to be written for each call, which hurts performance.
The default values are designed to work well with the default service configuration, including the default file formats.
End of the note.Max File Size
The maximum file size, in kilobytes, for the main file before closing all data files and starting to write to new files.
Files may be closed before reaching this limit, as all files are closed at the hour specified in the Hour in the day to close all files property.