[horde] Best timing settings for Horde ActiveSync

[Patrick De Zordo]

>
> The best thing to do is to allow the device to manage the heartbeat unless
> you have a really good reason for not doing so.  The heartbeat interval
> indicates the amount of time that a PING (or looping SYNC) is allowed to run
> (thus keeping a connection open on the webserver) if no changes are
> encountered. It doesn't have anything to do with how long after the request
> completes that another request is issued.
>
> You should tail the synclog of a OL2013 client and see what request is 
> running
> when you see this slowdown. If there is an active PING or looping SYNC
> running and you are seeing this delay, it could be that decreasing the
> "waitinterval" might help. This determines the number of seconds that the
> server sleeps between each iteration of the loop that checks for changes
> within a single PING/SYNC request. Though this value is used for every
> request (and is not something the client
> controls) so I'm not sure why it would affect OL and not other clients.
>
> If you notice a delay in the time between the end of one PING and the start
> of the next, then there is nothing we can do server-side to change that.


I've tried to debug a bit the things..
Please download this file: 
https://www.dropbox.com/s/tsdjfeaumhiy79p/BUG%20OL%20slow%20response%20on%20new%20message.zip?dl=0

This is the timeline:
- I have connected 1 Android and 1 OL2013 client via ActiveSync to our server 
(we are using Horde GIT version from some weeks ago).
- The problem is happening just with the OL2013 client

In "9A9F4000B00444C8BC2C1E40D55ED522_sleeping.txt" log file you can see some 
tailed details about the OL2013 client

OL2013 is working normal till 10:07:32: You can see "Sleeping for 15 seconds." 
In log again and again..
>From 10:07:32 - 10:12:50 -> nothing, sleeping, winter sleep..
>From 10:12:55 - 10:18:04 -> nothing, sleeping, winter sleep..
>From 10:18:05 - 10:23:23 -> nothing, sleeping, winter sleep..
>From 10:23:23 - 10:28:45 -> nothing, sleeping, winter sleep..
>From 10:28:50 - 10:34:08 -> nothing, sleeping, winter sleep..
>From 10:34:13 - 10:39:31 -> nothing, sleeping, winter sleep..

Then 3 times:
2015-01-12T10:39:32+01:00 INFO: [3158] Sleeping for 15 seconds.
2015-01-12T10:39:47+01:00 INFO: [3158] Sleeping for 15 seconds.
2015-01-12T10:40:04+01:00 INFO: [3158] Sleeping for 15 seconds.

>From 10:40:23 - 10:45:41 -> nothing, sleeping, winter sleep..

Then again lot of times:
2015-01-12T10:46:09+01:00 INFO: [10625] Sleeping for 15 seconds.
2015-01-12T10:46:25+01:00 INFO: [10625] Sleeping for 15 seconds.
..

On 11:30:xx - I have marked 1 message as read on smartphone..
>From 11:30:16 - 11:48:24 -> nothing, sleeping, winter sleep.. (at 11:45:25 - I 
have deleted another 2 messages on smartphone, just to clarify log lines)
>From 11:48:28 - 12:08:05 -> nothing, sleeping, winter sleep..
>From 12:08:10 - 12:13:28 -> nothing, sleeping, winter sleep..

OL2013 is showing "All folders are up-to-date" all the time..

So what is maybe causing this big delays?
Could this be a BUG, so I could create a new BUG?
If you need a complete Horde sync log, I could give you another link.

Thank you!
Patrick.


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