Hi Shradha,
E2E BI HOUSEKEEPING is must run job in solution manager. it is actually needed for your BI house cleaning.
1. We have not been using End to End analysis tab in solman workcenter tcode -> root cause analysis so is this job still necessary to run in solman ?
In 7.1, there is no dedicated guided concept for RCA, if you have done managed system configuration iteself, most of the extractors were active for the system, the data collection and storing to BI has started. You must have this housekeeping job. Recently solution manager has UPL integration too. All these features would go long term if you have proper housekeeping activity scheduled. hence please make this job running without fail.
2. If not, its been running for a while what would be the affect of un-scheduling the job now ?
3. Do I have to carry out any steps to check if doesn't affect any steps in solman or connected systems ?
This is the independent job, will not affect any other scheduled jobs.
Refer my blog How Is The Health Of Your SAP Solution Manager BI Content? and the sap note 1480588 - ST: E2E Diagnostics - BI Housekeeping - Information
Please check
Thanks
Jansi