I'm not sure this is the answer you are looking for, but for me 'it depends' is the right answer: how long the repertoire is, how difficult it is to master and how much time I have to practice..... another variable, always, is where I am with learning each piece: new and struggling vs. reasonable and 'polishing'. I can handle more in the 'polishing' rather the 'new to me and struggling' phase.
I would recommend that you think about whether what you are doing is too much for your personal circumstances: if it is, discuss with your teacher about putting something 'on hold' until you feel like you can accomplish something by working on it. If not 'keep on, keeping on' . We all have different amounts of time for practice, and different numbers of current repertoire from each other.