guanfeix opened a new issue #3956:
URL: https://github.com/apache/couchdb/issues/3956


   OS: Ubuntu 14.04.1
   KernelVersion: 4.19.90
   Architecture:x86_64
   CouchDB version: 1.6.1
   Erlang version: R16B03
   It's a single node,a little traffic,maybe about sixty dbs,each with around 
ten view_functions average
   Our Couchdb database directory  is /var/lib/couchdb
   After couchdb restart , df -h to check free 30G,even du -sh  show no change 
in disk take up.
   Find the question(root file system space is not enough):
   
![图片](https://user-images.githubusercontent.com/34960209/157635543-7a35d095-dc95-4af7-8bef-a3cdfd2a3e6e.png)
   After restart couchdb:
   
![图片](https://user-images.githubusercontent.com/34960209/157635627-570ca866-c2c6-4d2b-b9ce-241a8511dffd.png)
   
   And also I find the largest db file have a compact file  
dpl_job.compact,which compaction can't be really restart.so this db will never 
be compact.so It will increase always. 
   I try every methods to compact this database,autocompaction, url, futon 
compact and cleanup operation. whether delete(wiil produce a new smaller one) 
or not.
   
![图片](https://user-images.githubusercontent.com/34960209/157840735-a39e5e54-708b-4ff1-9c08-eabf3bb78713.png)
   
   this maybe related
   
![图片](https://user-images.githubusercontent.com/34960209/157848345-5582bdaa-d97d-4046-a0f2-e0bb01a077e0.png)
   
    


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