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Gregory_Gerard_'s avatar
Gregory_Gerard_
Icon for Nimbostratus rankNimbostratus
Jul 09, 2008

How long does it take to establish an HTTP connection?

I'm trying to get worst case information for how long it takes for an LTM 1500 to bring up a brand spanking new TCP connection to handle an HTTP request from the outside world.

 

 

Is there a monitor I can look at to quickly find out how much time is spent bringing up new TCP connections?

 

 

If I can't find the statistic, could someone venture a guess for what it *should* be for a switch 1gb Ethernet with no routing between LTM and pool members? A ballpark in milliseconds would be great.

 

 

thanks!
management
monitoring

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  • JRahm's avatar
    JRahm
    Icon for Admin rankAdmin
    Jul 09, 2008
    Are you asking about the Client->LTM connection, the LTM->Server connection, or both connections? If Client->LTM, that depends on latency (server side too if not on the LAN). I've personally never seen the LTM->Server handshake take longer than 1 millisecond on a directlly connected lan.
  • Gregory_Gerard_'s avatar
    Gregory_Gerard_
    Icon for Nimbostratus rankNimbostratus
    Jul 09, 2008
    Both would be good numbers to know. It doesn't seem like it should be much at all.

     

     

    Along a similar vein, is there a metric for tracking HTTP connection reuse?
  • Deb_Allen_18's avatar
    Deb_Allen_18
    Historic F5 Account
    Jul 28, 2008
    I concur with citizen_elah's observation, sub-millisecond for local conns.

    You can find OneConnect stats in the MIB. For the default profile named "oneconnect", the "ReUses "OID is:
    F5-BIGIP-LOCAL-MIB::ltmConnPoolProfileStatReuses."oneconnect"
    Full OID:
    .iso.org.dod.internet.private.enterprises.f5.bigipTrafficMgmt.bigipLocalTM.ltmProfiles.ltmConnPool.ltmConnPoolProfileStat.ltmConnPoolProfileStatTable.ltmConnPoolProfileStatEntry.ltmConnPoolProfileStatReuses."oneconnect"

    Numeric:
    .1.3.6.1.4.1.3375.2.2.6.4.2.3.1.4.10.111.110.101.99.111.110.110.101.99.116

    HTH

    /deb