ivansalloum I'm not using anything for object caching at the moment. It's not like it's a critical item, and backend speeds without it is still very good/snappy. I found Litespeed webserver boosted the backend really good too.
Some other things you can do to help wp-admin run faster is make sure the tables are all innodb, and you can add high performance index keys using the MySQL Index plugin (this plugin can convert old/slow myisam tables to innodb too, and you can uninstall the plugin when you're done using it).
