For sap user login history details Use transaction code SE16 and the table as USR02 and execute then displays the required information.
Used transaction codes you can use
Using ST03 with below procedure:
1. Start the Workload Monitor by calling transaction ST03.
2. Choose the instance and period to be analyzed by double-clicking.
3. Choose Analysis Views -> Transaction Profile -> Details -> <transaction code>.
4. The system displays the usual output area, in which the requested workload is displayed.
You can use even STAD or STAT also.
For more information click [SAP User Login Transaction code History details|http://help.sap.com/saphelp_nw04s/helpdata/en/1f/0be73ac6e7ec28e10000000a114084/frameset.htm].
For more information [clickme|http://help.sap.com/saphelp_nw04s/helpdata/en/1f/0be73ac6e7ec28e10000000a114084/frameset.htm].
Hi Senthil Kumar,
Please check the this [url|http://help.sap.com/saphelp_nw04/helpdata/EN/c7/69bcb7f36611d3a6510000e835363f/frameset.htm]. As per this Help document " The audit files are retained until you explicitly delete them " ,So you need to chek if some one manually cleared them by runing SM18. You need to check who run this.
Check this [Link|http://www.scribd.com/word/removal/11546901?query=howtoconfigure+sm19]
> We activate security audit logs in sm18. But it works on only one day.
You can activate and deactivate the Security Audit Log as necessary. Although you may wish to audit your system on a daily basis, you do not have to. For example, you may wish to activate the Security Audit Log for a period of time before a pre-designated audit and deactivate it between audits.If you want toactivate the audit log set the below mentioned profile using RZ10
rsau/enable: Set to 1 to activates audit logging
rsau/local/file: Name and location of the audit log file
rsau/max_diskspace/local: Max. space of the audit file. If maximum size is reached auditing stops.
rsau/selection_slots: Max. number of filters
Look Kumar,the maximum size of an audit file is 2 gigabytes for a single day.So the in case of profile parameter rsau/max_diskspace/local the min value is 1000000kb & maximum value is 2GB.For profile parameter rsau/max_diskspace/per_file minimum is 1MB & Maximum is 2 GB.Like that for rsau/max_diskspace/per_day minimum value should be 3*per_file & maximum 1024 GB.So check these parameter.