Yeah kdb is built so that the entire core of the db fits in L1 CPU cache. It really is an impressive feat of engineering and optimization.

I did hate it when we used it however. It required more or less a team of people doing querying on it fulltime. Have you seen the queries in Q? It looks like someone set the baud speed wrong on a serial connection:

From wikipedia's page on Q (the query language of kdb):

    The factorial function can be implemented directly in Q as
    
    {prd 1+til x}
    or recursively as
    
    {$[x=0;1;x*.z.s[x-1]]}