> There's a good bit of depth in the archives of this list. I would start > searching back for discussions of effective_cache_size, as that is involved > in *costing* the caching job that the OS is doing.
Thanks - that's just what I need to sink my teeth into. I'll have a trawl and get back later. Regards Andy ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match