Hi @jiang_xu1 and welcome in the MongoDB community 
!
Do you have a jumbo chunk issue on this collection? What’s the shard key? How many chunks do you have in this collection and how big is it in total?
Cheers,
Maxime.
Hi @jiang_xu1 and welcome in the MongoDB community !
Do you have a jumbo chunk issue on this collection? What’s the shard key? How many chunks do you have in this collection and how big is it in total?
Cheers,
Maxime.