Pool Stats

You are correct that one connect basically cuts down LB to server connection and reuses any idle connection and manages the sessions within the connection. The pool states from I can tell only look at connections and not sessions.

 

 

I hope this helps

 

 

CB

 

so there is not way to see how the sessions are being distributed across a pool?

There is no concept of application session at the TCP layer, so CB's response is correct.

 

 

Are you trying to track which HTTP requests are associated with which TCP connection? If not, can you clarify what the problem is and what you're trying to determine?

 

 

Thanks,

 

Aaron

Every so often I get a "the application is performing slowly and we think the LB isn't distributing load correctly", which is miraculously fixed by restarting their app on one of the servers in the pool, yet they never seem to stop blaming the LB. :-) They also never seem to understand that we use persistence too. What I'm trying to determine is there a way to see how many users are connected to each server in the pool. I know, with persistence, it's very likely that one server will have more load than another. When this 'issue' cropped up yesterday, I looked in the GUI at the pool stats and saw 3 current connections to this pool, 1 current connection to pool member 1 and 2 current connections to pool member 2. I told the business owner that and he did not believe that only 3 people were using this app at that particular time. Hence my trying to figure out a way to see how many users were actually connected to the pool and how many were on each server in the pool (there are 2 servers in this pool).

If this is a web application, then it's possible you can pull this information from WebTrends or something some server that can analyze each log file from the web server.

 

You can also probably write up an irule to count each HTTP trigger to track the connections. Here is a link to a forum post talking about using Profile STATS which can store custom counter information

 

(http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&tpage=1&view=topic&postid=33148).

 

In the post they are tracking Web content but, it's possible to track sessions on clients.

 

I hope this helps

 

thanks,

 

CB

Conceptually, I suppose you could use the session table to store [IP::server_addr] as the key and increment/decrement the value on each request/response then do a lookup periodically to log the data.

with the possibility of showing my ignorance, i am wondering if there is a way to show pool stats for only 1 pool, and/or to include stats for only the active nodes in a given pool? i have an LTM running 9.4.3. i've done some searching but i cannot seem to find a way to this, with a iRule perhaps? I have written a few iRules so I am not completely in the dark, but i seem to be missing something somewhere. thanks in advance for any ideas or anyone who can point me to a URL i can read. thanks...

you could use a script to do this (icontrol or a perl script gathering via snmp) I wrote a perl script for interface stats (Click here) a while back that could be modified for pool stats. Probably best not to be an iRule, but it is possible.