[horde] memcache session tracking

[Kevin Konowalec]

If that is the same session tracking that you can get through the  
admin interface I've tried it.  It THRILLED me to finally be able to  
see who was logged on at any given time since we had that  
functionality with mySQL-based sessions but lost it when we went to  
Memcache.

Unfortunately as soon as I put the machines into production and under  
load it becomes useless.  The web page times out before showing me  
anything.  So I've stopped playing with it - doesn't seem to work well  
with large installations like ours (70,000+ users).


K

On Oct 13, 2008, at 6:21 PM, Andrew Morgan wrote:

> Is anyone successfully using the memcache session tracking  
> ($conf['sessionhandler']['params']['track'] = true  with memcache  
> sessions)?
>
> It seems to work on a lightly loaded test system I have.  It will  
> display session information for logged in folks.
>
> On our production system (3 frontends, several million hits a day),  
> it will never contain any session older than a few seconds.  I wrote  
> a small command line php script to fetch the tracking variable from  
> memcache and parse it.  Successive runs output:
>
> webmail4:/private/admin# php session_count.php
> Found sessions.
> array(3) {
>  ["2427e1d36ffa5a7b3fb4b6a709907a97"]=>
>  int(1223943400)
>  ["d978d68aca74351c25543e5b65cba284"]=>
>  int(1223943400)
>  ["75fca5d8bfb8e2f6789b88d8d1c85104"]=>
>  int(1223943401)
> }
> Total Sessions: 3
> Authenticated Sessions: 2
>
>
> webmail4:/private/admin# php session_count.php
> Found sessions.
> array(4) {
>  ["2427e1d36ffa5a7b3fb4b6a709907a97"]=>
>  int(1223943400)
>  ["d978d68aca74351c25543e5b65cba284"]=>
>  int(1223943400)
>  ["75fca5d8bfb8e2f6789b88d8d1c85104"]=>
>  int(1223943401)
>  ["ea2a5c6fdbf09a46fb8b09f190e4696f"]=>
>  int(1223943402)
> }
> Total Sessions: 4
> Authenticated Sessions: 2
>
>
> webmail4:/private/admin# php session_count.php
> Found sessions.
> array(4) {
>  ["362415f027bf0d9d0020b8e996ffd381"]=>
>  int(1223943404)
>  ["f635e9ff1c8995a7b252996c8e3674fc"]=>
>  int(1223943404)
>  ["315b7bd0a4dfdf3f531a9840e3922d42"]=>
>  int(1223943404)
>  ["c7c8bdb59270d3c9199fad8b05254e20"]=>
>  int(1223943404)
> }
> Total Sessions: 4
> Authenticated Sessions: 1
>
>
> Could this be a garbage collection problem?
>
> I would like to get a count of authenticated sessions in order to  
> track usage patterns over time.  Has anyone else using memcache for  
> sessions found a way to do this?
>
> Thanks,
> 	Andy
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