Which .so is needed?
I run mostly vbulletin. And these .so are loaded
extension = "pdo.so"
extension = "pdo_sqlite.so"
extension = "sqlite.so"
extension = "pdo_mysql.so"
extension = "memcache.so"
I use APC.
I am not sure about timezonedb.so, what is it?
About memcache.so, i plan to remove it.
About the rest (pdo, pdo_sqlite, sqlite), i am not sure what is it.
pdo_mysql.so, i think it is for normal mysql code, so i need it.
I use litespeed