ElChristou wrote:maxim wrote:...This even more indicates a performance (and hence optimization) leak of the unterlying database...
There is a cure doctor?
If the SQL database is the bottleneck (which doesn't seem to be the case as selden explained above) and if the database runs on a MySQL Server, I would suggest reading chapter 7 'MySQL Optimization' of the MySQL manual that can be found here:
http://dev.mysql.com/doc/mysql/en/mysql-optimization.html
It's difficult to give further advice, as database performance issues are very individual to the actual structure of the used database and the underlying hardware.
Another advice would be to scan phpbb-technical-forums to check if someone owns a forum that has yet been used so extensively that database performance became a problem.
maxim