[imp] Re: [horde] Who is online?

[Gary Smith]

Careful grasshopper...  A friend of mine runs multiple web sites for a small company on a dual processor Xeon and one of the things that they run quite a bit is phpnuke and phpbb.  You would be amazed at the resources it actually takes to keep track of these.  First off is it real important to track these users and if you are required to then what is the best way.  We found that by removing things like "who's online" tracking information out of programs like phpnuke we get a good amount of CPU back under normal usages (300k hit's/day).

Maybe using some sort of shared memory might be in order but this would only work on single server instances.  This would reduce your read/write time.  I think that updating the database for every user is almost insane as the data is not important (as it's only temporary state data) and isn't worth the write cycles.  OTOH I do know that sometimes business requirements seem far more important than performance (especially if your managers are like mine :) ).

So, in essence my short answer is don't do it but if you have to don't write it to a db and try not to write it to disk (shared memory being preferred over the rest).

Gary Smith



 -----Original Message-----
From: 	Sn!per [mailto:sniper at home.net.my] 
Sent:	Sunday, September 07, 2003 9:12 PM
To:	imp at lists.horde.org
Subject:	[imp] Re: [horde] Who is online?

Charles Robinson wrote:
> The way I tell is from the logs.
> The logs shows when someone logs in & logs out of horde.

could we, instead, simulateneously write the login/logout info to db (and /tmp/horde.log) and then access it from there. could this technique be faster than opening/reading/and searching thru unix filesystem ?

please advise.


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