There seems to be a bug where doing .dropCollection() and then immediately recreating the collection does not seem to release space back to OS. This was encountered where a collection was dropped and immediately remade with the same indexes in order to free space. But this then required a server res…

@rkamath - this is an expected behavior in MongoDB. MongoDB seldom returns disk space to the operating system during deleting, these disk pages are marked dirty and reserved for writing in the future. The compact command lets WiredTiger return this space. (like PostgreSQL’s Vacuum). Note, that the c…

.dropCollection() potential bug

MongoDB Percona Server for MongoDB

rkamath July 16, 2024, 2:18pm 4

https://perconadev.atlassian.net/browse/PSMDB-1480
I created it here although I’m not sure if this was the right place or not.

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.dropCollection() potential bug

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