PUBLIC MARKS with tags performance & cleverplanet

For a fairly large community site (think OG, node access control, private messages etc), we were getting in trouble giving authenticated users a decent browsing experience. The worst page was taking 16 (yes, sixteen) seconds to load and others were getting in trouble too now that the number of users and nodes was growing rapidly. Not acceptable of course, so we went searching for solutions:

excellente présentation faite par Oracle traitant de l’optimisation des performances de PHP dans un environnement base de données Oracle avec le driver OCI8