Make keealive feature more robust

[ekofedriyanto]

Make keealive feature more robust

[GoogleCodeExporter]

The default keepalive packet interval is set to 2 minutes.

This can be overriden by the device itself when it establishes the Push Daemon. 

On a BlackBerry 8330 Curve on the Sprint CDMA network, the optimal interval 
without a
dead connection is 55 seconds. From the BlackBerry forums, this seems to be a 
bug in
the TCP stack shipped with the 833x devices.

After testing it even at 55 seconds, the battery impact is minimal

Polling is the last resort, but provided as an option for the user nonetheless. 
The
processing needed to build and destroy a connection is quite expensive for the
battery. If the poll interval is set to something like 30 minutes, then its ok. 
But
then again, a wait of 30 minutes for a Cloud update is a sucky end user 
experience.

Also, push vs poll depends on the App itself. If its a messaging app like 
Email, its
a blocker, but say its some non-critical departmental App, then its ok.

Original comment by [email protected] on 24 Apr 2010 at 8:04

• Changed state: Verified