Session Handling: Which Should I Choose?

[eluser]EugeneS[/eluser]
[quote author="WanWizard" date="1282099506"] the database engine is a lot more effecient in I/O then PHP's file I/O code. [/quote]

you might be kidding here
file reading slower than running SQL query ? do you understand that database/table any ways stored in files and MySql is kind of intermediary ?

more over highly visited sites makes sessions table reindexing all the time and as higher load as higher database load ... if table engine MyISAM then we have table locks = queue
if InnoDB = slower updates/inserts

and you still wanna say that storing sessions in DB is more efficient way than native sessions ?
you will never make me believe that use of intermediary + slow all the time updates and inserts (with the use of already loaded mysql with other queries) could be faster than just separate read and write to file by file name

storing sessions in the database cant be faster than native php sessions