I’m not sure if this has been asked before? But is there information on how much time a Jedi can spend without sleeping? Or without eating or drinking? Does the force help with that? Because I think there was a TCW episode when they were chasing Grievous and Obi-Wan mentioned that Anakin hadn’t sleep in a long time and I’m wondering if he was exaggerating or it was real?

padawanlost:

Yes, Jedi can go for a
long time without sleep, food or rest. Most of them can push themselves beyond
the normal limits of the human body but to go without sleep or food for a
really long period (years) was something most Jedi could not achieve.

[Obi-wan] drew himself
into an alert meditative state. For the last couple of years, Obi-Wan had tried to cut down on his need
to sleep. While all of the Jedi he knew slept, he had heard that some did not.
He was certain that meditative alertness performed all the functions of sleep,
and would give him time to examine his own thoughts at their deepest levels, to
maintain vigilance. [Greg Bear. Rogue Planet]

[Anakin] started
crawling again, once more ignoring the hot, quivering protests of strained
muscle and sinew. Refusing to acknowledge his dry mouth and throat, the
headache behind his eyes, the voracious rumbling in his gut. The Force would sustain him a little while
yet. [Karen Miller. Clone Wars Gambit: Stealth]

How many days ago had that been? [Anakin]
couldn’t remember. Not many. When you don’t sleep, days smear together into a
haze of fatigue so deep it becomes a physical pain. The Force could keep him
upright, keep him moving, keep him thinking, but it could not give him rest. Not that he wanted rest. Rest might
bring sleep. What sleep might bring, he could not bear to know. [Matthew
Stover. Revenge of the Sith]

 But this force ability
was not without consequences:

To his great relief,
Obi-Wan managed a faint chuckle. “No. It’s all right. Truth be told, I’m
hungry, too. It’s unfortunate but it can’t be helped. We’ll manage.” Of course they would. They’d manage by
drawing on the Force to fuel them. Which it would, but at a steep cost to their
overstretched bodies. And when the inevitable crash came afterward it was going
to be messy. “I can cope with the burnout,” Anakin said. “But what about
you?” [Karen Miller. Clone Wars Gambit: Stealth]

 The war made them push
themselves more than usual so we could say most Jedi were sleep-deprived and
eating poorly during that time. but they manage to keep their strength up by
using the Force. In Anakin’s case, this is particularly true as he lost weight
and, by his own admission, hadn’t slept properly in years.

[Anakin] was badly
distracted and full of unease. His
dearly familiar Jedi tunic looked just a little too loose on him, as though
he’d recently lost some weight. The war’s wearing him down. He takes it so
personally. He wants to fix everything that’s broken. He thinks that’s his job.
[Karen Miller. Clone Wars Gambit: Stealth]

 “I—no. No, I’m all
right.” Anakin sank gratefully into a dangerously comfortable chair. “I’m
just—a little tired, that’s all.” “Not sleeping well?” “No.” Anakin offered an
exhausted chuckle. “I haven’t been
sleeping well for a few years, now.” [Matthew Stover. Revenge of the Sith]

PS: Despite using the
force to sustain himself, Anakin didn’t enjoy going hungry for a very particular
reason.

 If he said hungry,
Obi-Wan would throw something at him. But he was. [Anakin] was ravenous. And he hated, hated, feeling hungry. The sensation
stirred too many memories. Distracted him with the past when he needed his mind
on the present. [Karen Miller. Clone Wars Gambit: Stealth]