topic Re: Collisions in Operating System - HP-UX

Collisions

Jeff Ferris — Wed, 29 Nov 2000 14:03:00 GMT

Help. My database and OS seems to be working at peek performance, however, I am seeing alot of collisions on 'glance plus' all of the sudden which is slowing down the users response time.
The analogy is it seems as if we had a 18 lane open highway into our server and it has been reduced to 5 lanes. Any suggestions?!?

Re: Collisions

Carol Garrett — Wed, 29 Nov 2000 15:20:27 GMT

According to the O'Riellys TCP book if you are experiencing network collisions at a rate 10% or more of packets then your local subnet is flooded (too many TCP devices transmitting) and you need to move some devices off your subnet or move your host to a lesser used subnet.

Re: Collisions

David Lodge — Thu, 30 Nov 2000 12:58:18 GMT

This is a complicated subject - a lot of which depends upon your network setup - for example in a switched domain you should see *no* collisions.

There are a few things that you should check on your server. Make sure the hub/switch settings are the same as for your NIC.

For example if your duplex/speed is misset you will see a lot of collisions.

This can be checked using the 'lanadmin -x' command and set using 'lanadmin -X'.