It depends on the level you are looking at it. From a high level, every
database does PIO (read/write data to disk), then from the buffer cache
(global/local) it does do LIO (accessing buffers). Access to these buffers is
synchronized (latching/locking not only on buffers but also on a higher level
-> SQL statements). Ofcourse requests need to be forwarded to the database
engine. You need network for that (tcp, pipe, shared memory, etc).
So I think that each database has these 4 areas:
Network - Synchronization - LIO - PIO
Ofcourse for each database vendor there are different kind of stats /
principles in each area. That is where you have to learn.
Optimizing databases is basically reducing PIO, LIO, Synchronization and
Network traffic .....
Anjo.
On Saturday 15 February 2003 17:38, you wrote:
> I overheard one guy mention that once you learn one database, you know them
> all. Is this true? Or was he just talking about the theory behind the db?
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