queueing

Oracle Advanced Queue with VB help needed

I have attempted to get the advanced queueing code work with no good results. It just doesnt call the callback function when i add a new entry in the queue from Sql Plus or SQL DEveloper. I have put the Callback class as an Active X DLL. Any help is appreciated. Form Level Code Dim S As String 'Create the OraSession Object Set SS = C...

Tools for quantitative systems performance analysis ?

I have a model of a simple distributed system as a heterogeneous network of a number of producers and consumers of various classes of workitem, and a number of compute nodes which can process those workitems at various rates. There are arcs connecting the nodes introducing latencies and bandwidth limits. What I'm looking for is some pr...

Where are possible locations of queueing/buffering delays in Linux multicast?

We make heavy use of multicasting messaging across many Linux servers on a LAN. We are seeing a lot of delays. We basically send an enormous number of small packages. We are more concerned with latency than throughput. The machines are all modern, multi-core (at least four, generally eight, 16 if you count hyperthreading) machines, a...