I have a teamspeak3 server latest version on Ubuntu 14.04 and Maria DB, with increased cache values.
So here is the issue, at first with normal cache values whenever someone changed a channel or deleted everyone would Drop out of the server.

So I increased the values to a few dozens MB more of cache, everyone in the server got a disconnect when the server deleted a channel, and someone with a 'Bang*' in the nickname left afterwards (nicknames replaced with ### for obvious reasons).

I suspect that Ts3 server has a blocking problem with the DB, if it does not respond immediately 200 ppl...ish get connection lost.
Server has NPL.

2015-07-31 21:17:22.628330|INFO |VirtualServerBase| 1| client disconnected '######'(id:54395) reason 'reasonmsg=leaving'
2015-07-31 21:17:24.703768|INFO |VirtualServerBase| 1| client disconnected '#########'(id:54840) reason 'reasonmsg=Leaving'

2015-07-31 21:18:31.125513|INFO |VirtualServerBase| 1| channel 'PTL'(id:42556) deleted by 'server'(id:0)

2015-07-31 21:18:31.995558|INFO |VirtualServerBase| 1| client disconnected '#######'(id:48770) reason 'reasonmsg=leaving'
2015-07-31 21:18:32.886026|INFO |VirtualServerBase| 1| client disconnected '#######'(id:25948) reason 'reasonmsg=connection lost'
2015-07-31 21:18:32.891429|INFO |VirtualServerBase| 1| client disconnected '######'(id:54056) reason 'reasonmsg=connection lost'
2015-07-31 21:18:32.894898|INFO |VirtualServerBase| 1| client disconnected ####''(id:52382) reason 'reasonmsg=connection lost'
2015-07-31 21:18:32.898359|INFO |VirtualServerBase| 1| client disconnected '#######'(id:54827) reason 'reasonmsg=connection lost'
2015-07-31 21:18:32.901938|INFO |VirtualServerBase| 1| client disconnected '########'(id:37305) reason 'reasonmsg=connection lost'
2015-07-31 21:18:32.905424|INFO |VirtualServerBase| 1| client disconnected '#######'(id:51182) reason 'reasonmsg=connection lost'
2015-07-31 21:18:32.908304|INFO |VirtualServerBase| 1| client disconnected '####'(id:54828) reason 'reasonmsg=connection lost'
2015-07-31 21:18:32.911415|INFO |VirtualServerBase| 1| client disconnected '#######'(id:53909) reason 'reasonmsg=connection lost'
2015-07-31 21:18:32.914815|INFO |VirtualServerBase| 1| client disconnected '#######'(id:41209) reason 'reasonmsg=connection lost'
2015-07-31 21:18:32.919137|INFO |VirtualServerBase| 1| client disconnected '#####'(id:30819) reason 'reasonmsg=connection lost'
2015-07-31 21:18:32.942576|INFO |VirtualServerBase| 1| client disconnected '####'(id:53296) reason 'reasonmsg=connection lost'
2015-07-31 21:18:33.317292|INFO |VirtualServerBase| 1| client disconnected '#####'(id:49670) reason 'reasonmsg=connection lost'
2015-07-31 21:18:33.392210|INFO |VirtualServerBase| 1| client disconnected '#####'(id:53852) reason 'reasonmsg=connection lost'
2015-07-31 21:18:33.396684|INFO |VirtualServerBase| 1| client disconnected '#####'(id:48016) reason 'reasonmsg=connection lost'
2015-07-31 21:18:33.403250|INFO |VirtualServerBase| 1| client disconnected '#####'(id:53772) reason 'reasonmsg=connection lost'
2015-07-31 21:18:33.419045|INFO |VirtualServerBase| 1| client disconnected '#####'(id:44825) reason 'reasonmsg=connection lost'
2015-07-31 21:18:33.436040|INFO |VirtualServerBase| 1| client disconnected '####'(id:54809) reason 'reasonmsg=connection lost'
2015-07-31 21:18:33.444133|INFO |VirtualServerBase| 1| client disconnected '###'(id:54810) reason 'reasonmsg=connection lost'
2015-07-31 21:18:33.449325|INFO |VirtualServerBase| 1| client disconnected '######'(id:47016) reason 'reasonmsg=connection lost'


and a lot more