It was basically two training battalions of Waffen SS who were stationed nearby, along with a few hundred other odds and ends. About 2000 men total. The Germans suffered 17 dead and 94 wounded. On the Jewish side, there were about 13,000 dead and 56,000 survivors shipped off to the death camps.
Lots of folks confuse the 1943 Ghetto uprising with the much larger Warsaw uprising about 18 months later. You are correct as to the battle being discussed. Not a major drain on the Nazi resources at that time, and no real impact on the war.