I recently had an issue where my PS4 would kind of stall and then beep three times every time I shut down or went into rest mode. Rebuilt the database and it helped some, but the problem went away entirely after I went to power options and restarted the PS4 from there. It seems that can help as well.
I did this once and if I remember correctly, I lost my entire home screen layout set up. I'm kind of hesitant to do it now on Vita due to that. Although last time I mostly did it due to missing options in the settings, I was trying to turn off party join notifications and the option just was not there until I did a rebuild.
Not really, but then I have to point out that sometimes after a firmware update it may do a database rebuild anyway and I vaguely remember there being a recent one, so if there was a difference it would have been minimal to me. It is a good maintenance tool however and something you want working correctly, whether it be manual or after an update so it's something you would want to fix regardless imo.
As I pointed out with the Vita, I was missing options until I did a rebuild. This was also the same with the PS3, as most EU owners will know we have a Singstar app thing always on our XMB, that disappeared for me until I did a rebuild. Not that I wanted it back, but a rebuild is not just for performance, it's for keeping everything in working order and making sure everything is as how it should be, which is probably why it does a rebuild after some firmware updates and is most likely the same with PS4.
Trying this now... I have a issue where the ps4 has trouble turning on. Like it will beep get to the PS symbol. And turn off. Sony want 150 bucks to fix because I'm out of warranty. My thing is.... it's going on hour 2. And isn't showing any connection to the tv. Is this normal?
Have had this problem off and on for over a year now. Sony's advice was a short term fix but the problem kept coming back. Since my console was out of warranty I opened the case and put a piece of electrical tape over the eject button sensor -- no problems since (I just have to eject with the controller).
If you're having issues, first step should be to switch the PS4 off completely. Not even a restart, a complete shutdown, then restart from cold.
After that, a DB rebuild should be next on the list. Basically the thing to remember is that this is essentially a stripped down PC, and the kind of housekeeping you *should* do on a PC applies. Things like constantly using suspend can cause loading issues, so it's always best to occasionally power down completely and restart.
DB rebuild is, I'm guessing, like defragging an HDD or disk cleanup.