Re: Why unused space of wiredTiger stay unused?

From: michael.cahill@xxxxxxxxx
To: mongodb-user <mongodb-user@xxxxxxxxxxxxxxxx>
Date: Thu, 28 Apr 2016 19:58:22 -0700 (PDT)
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Hi Yos,
 

Why 591m still stays unused(available for reuse)?
If they were used efficiently, file size would not go up to 1520m.


It's difficult to be certain, but space does not become available in 
WiredTiger immediately.  At least one checkpoint has to complete in between 
the removes and the space becoming available.

If you sleep for ~2 minutes after the removes, before inserting again, do 
you still see the file grow?

Regards,
Michael.

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