> ? the registry is totaly in CPU, no disk i/o? The Registry hives are loaded into pageable memory when the system loads, so even an initial read of a user password is from RAM (unless you're extremely memory-starved). On top of that, the Registry has *extremely* good, heuristic caching for reads, so after the first auth for each user, you're reading even faster. It does 5-second lazy writes for writing.
> wouldn't the 250k registry fit in 128 mbytes controller cache? It is likely that it would even use controller cache for the writes, but it does depend on what else is in the Registry besides Imail and whether WM/WC settings are being stored for every user. 250K users could put the Registry size over 128 MB in some cases. Sandy Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit the Knowledge Base for answers to frequently asked questions: http://www.ipswitch.com/support/IMail/
