Most database servers will use RAM as aggressively as possible (limits defined in the configuration files), so yes, more RAM is preferable. However, it's diffic

Most database servers will use RAM as aggressively as possible (limits defined in the configuration files), so yes, more RAM is preferable. However, it's difficult to get a large amount of RAM at an affordable price when it comes to VPS. There's a little saying that's like, "Don't think of an SSD as expensive disk; think of it as cheap RAM." I think that's a good rule that serves well, more or less, if you orient your systems to behave that way.