It is in the view that we come across many day to day issues in VCS environment, of which most of them (if not all) would not have occurred if these servers where once rebooted periodically (may be once is fortnight).
And rest of the genuine problems seems to be with not applying some or the other fix that already exist.

So, is there a need to perform periodic maintenance of the HA environment? Is there such a maintenance list already available.
 
To list some

1. Restarting the HA service alone (online activity)
2. Restarting the HA Agents alone (online activity)
3. Reboot of the servers
4. Applying Rolling Patch
5. Upgrading to new Maintenance Level